Tektronix 1780-R инструкция обслуживания

Operator ’ s Manual 1780R-Series V ideo Measur ement Set 070-6890-08 This document supports firmware version 1.10 to 1.16. Operator ’ s Manual 1780R-Series V ideo Measur ement Set 070-6890-08 This document supports firmware version 1.10 to 1.16.[...]

Copyright © T ektronix, Inc. All rights reserved. T ektronix products are covered by U.S. and foreign patents, issued and pending. Information in this publication supercedes that in all previously published material. Specifications and price change privileges reserved. T ektronix, Inc., P .O. Box 1000, W ilsonville, OR 97070–1000 TEKTRONIX and T[...]

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W ARRANTY T ektronix warrants that the products that it manufactures and sells will be free from defects in materials and workmanship for a period of three (3) years from the date of shipment. If a product proves defective during this warranty period, T ektronix, at its option, either will repair the defective product without charge for parts and l[...]

Contacting T ektronix Product Support For questions about using T ektronix measurement products, call toll free in North America: 1-800-TEK-WIDE (1-800-835-9433 ext. 2400) 6:00 a.m. – 5:00 p.m. Pacific time Or contact us by e-mail: tm_app_supp@tek.com For product support outside of North America, contact your local T ektronix distributor or sales[...]

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1780R-Series Operator ’ s Manual i T able of Contents General Safety Summary xi . . . . . . . . . . . . . . . . . . . . . . . . . . . . Getting Started Documentation Overview 1–1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Operator ’ s Manual 1–1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Service Manual 1?[...]

T able of Contents ii 1780R-Series Operator ’ s Manual Power 2–3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . CR T Controls 2–3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Precision Measurement (Large Knob) 2–5 . . . . . . . . . . . . . . . . . Menu Access Switches 2–7 . .[...]

T able of Contents 1780R-Series Operator ’ s Manual iii Parade Operation 3–23 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T wo Line or Field Parade 3–23 . . . . . . . . . . . . . . . . . . . . . . . . . . . Three Line Display 3–23 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Offset Menu 3–23 . [...]

T able of Contents iv 1780R-Series Operator ’ s Manual Measure Menu 3–56 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Using the Measure Menu 3–56 . . . . . . . . . . . . . . . . . . . . . . . . . . . Beep 3–57 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Store and Recal[...]

T able of Contents 1780R-Series Operator ’ s Manual v K Factor Measurement 4–20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Enter K Factor Mode 4–20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Making K Factor Measurements 4–20 . . . . . . . . . . . . . . . . . . . . . Chroma / Luma Inequalities Measurement [...]

T able of Contents vi 1780R-Series Operator ’ s Manual List of Figures Figure 1–1: Location of the four scr ews that secure the instrument to rack-mounting cabinet or portable case 1–5 . Figure 1–2: Dimensions used for rack-mounting the 1780R-Series V ideo Measur ement Set 1–6 . . . . . . . . . . . . . . . Figure 1–3: Dimensions of the [...]

T able of Contents 1780R-Series Operator ’ s Manual vii Figure 3–15: Left Side of Fr ont Panel, showing Menu Buttons and T ouch Screen 3–31 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 3–16: T ouch Screen 4 X 4 Matrix 3–33 . . . . . . . . . . . . . . . . Figure 3–17: Password Menu Scr een 3–34 . . . . . . . .[...]

T able of Contents viii 1780R-Series Operator ’ s Manual List of T ables T able 2–1: Possible Parade and Overlay Configurations 2–1 1 . . T able 2–2: W aveform Magnification 2–13 . . . . . . . . . . . . . . . . . . . T able 2–3: Multiple Filter Displays 2–14 . . . . . . . . . . . . . . . . . . . . T able 2–4: Possible CH B1, CH B2, [...]

T able of Contents 1780R-Series Operator ’ s Manual ix T able 5–2: W aveform Monitor V ertical System 5–2 . . . . . . . . . . T able 5–3: W aveform Monitor Probe Input 5–7 . . . . . . . . . . . . . T able 5–4: W aveform Monitor Horizontal Deflection System 5–7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .[...]

T able of Contents x 1780R-Series Operator ’ s Manual T able of Contents x 1780R-Series Operator ’ s Manual[...]

1780R-Series Operator ’ s Manual xi General Safety Summary Review the following safety precautions to avoid injury and prevent damage to this product or any products connected to it. T o avoid potential hazards, use this product only as specified. Only qualified personnel should perform service pr ocedur es. T o Avoid Fire or Personal Injury Use [...]

General Safety Summary xii 1780R-Series Operator ’ s Manual Do Not Operate in Wet/Damp Conditions. Do Not Operate in an Explosive Atmosphere. Keep Product Surfaces Clean and Dry . Provide Proper V entilation. Refer to the manual’ s installation instructions for details on installing the product so it has proper ventilation. Safety T erms and Sy[...]

Getting Started Getting Started[...]

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1780R-Series Operator ’ s Manual 1–1 Getting Started Documentation Overview This operator ’ s manual is one of a set of two manuals that document the T ektronix 1780R-Series V ideo Measurement Set. T o purchase a service manual, please refer to the “Contacting T ektronix” page located near the front of this manual for address and phone nu[...]

Getting Started 1–2 1780R-Series Operator ’ s Manual Documentation Conventions W ithin this manual, front-panel push-button names are shown all in capitals, such as the PRESET menu button. T ouch screen words are represented in brackets, such as <DEF AUL T>. CR T instructional labels, such as SELECT MEASUREMENT , are represented in italic[...]

Getting Started 1780R-Series Operator ’ s Manual 1–3 A selection of internal and external graticules and electronic cursors permit measurements specific to many studio and transmission system applications. An external horizontal input facilitates ICPM measurements. External staircase from a camera control unit may be selected remotely . Slow sw[...]

Getting Started 1–4 1780R-Series Operator ’ s Manual 1780R-Series Package The 1780R-Series is supplied as a single 5 1/4-inch high package, ready for rack-mounting. A portable cabinet is available, providing handle, feet, and front and rear covers. The instrument is equipped with a high reliability cooling fan so that no clearance is required a[...]

Getting Started 1780R-Series Operator ’ s Manual 1–5 Figure 1–1: Location of the four screws that secure the instrument to rack-mounting cabinet or portable case W ARNING. Do not attempt to carry a cabinetized instrument without installing the r ear-panel mounting scr ews. Ther e is nothing to hold the instrument in the cabinet if it is tippe[...]

Getting Started 1–6 1780R-Series Operator ’ s Manual Figure 1–2: Dimensions used for rack-mounting the 1780R-Series Video Measurement Set Getting Started 1–6 1780R-Series Operator ’ s Manual Figure 1–2: Dimensions used for rack-mounting the 1780R-Series Video Measurement Set[...]

Getting Started 1780R-Series Operator ’ s Manual 1–7 Figure 1–3: Dimensions of the adjustable rear rack-mounting bracket T o install the instrument in the rack: First remove the four securing screws and take the instrument out of the rack-mounting cabinet. (All 1780R-Series instruments are shipped in the rack-mounting cabinet to provide extra[...]

Getting Started 1–8 1780R-Series Operator ’ s Manual Figure 1–4: Installing rear rack-mounting brackets for rack applications of depths from 18 to 24 inches NOTE . For ease of installation, place the nut bars to the outside of the adjustable brackets and drive the scr ews from the center into the nut bars. For applications where it is necessa[...]

Getting Started 1780R-Series Operator ’ s Manual 1–9 Options The 1780R-Series is shipped with a standard U.S. plug, or can be ordered with one of the following options. Option A1 (220 V , European plug) Option A2 (240 V , United Kingdom plug) Option A3 (240 V , Australian plug) These are the only options currently available for the 1780R-Series[...]

Getting Started 1–10 1780R-Series Operator ’ s Manual Optional Accessories The following is a list of the most common accessory items for the 1780R-Series. Part numbers, if applicable, are listed in Section 6. 1780R-Series Service Manual V iewing Hood Portable Cabinet Extender Kit for Oscillator and Z-Axis Circuit Boards Getting Started 1–10 [...]

Connectors, Controls, Indicators Connectors, Controls, Indicators[...]

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1780R-Series Operator ’ s Manual 2–1 Connectors, Controls, Indicators This section provides an overview of control and connector functions. T o locate more detailed information, please refer to the manual index or table of contents. Switches Push and release the front-panel switches to toggle between selections. Push and hold to access outlined[...]

Connectors, Controls, Indicators 2–2 1780R-Series Operator ’ s Manual Audio Feedback (Beep) A Beep Sounds When: The limit of a front-panel control range has been reached. An attempt is made to change a locked setting. An attempt is made to access an invalid condition, such as a Parade display in 1-line mode. Disable the Beep Selecting Beep Of f[...]

Connectors, Controls, Indicators 1780R-Series Operator ’ s Manual 2–3 Front-Panel Controls NOTE . Locations for the following contr ols ar e shown in Figure 2–1. Power 1. POWER. The Power push-button switch turns the instrument on or to standby status, and displays a colored spot inside the switch when power is on. CRT Controls The five CR T [...]

Connectors, Controls, Indicators 2–4 1780R-Series Operator ’ s Manual Figure 2–1: Left side of front panel Connectors, Controls, Indicators 2–4 1780R-Series Operator ’ s Manual Figure 2–1: Left side of front panel[...]

Connectors, Controls, Indicators 1780R-Series Operator ’ s Manual 2–5 7. VER T POS. Use the V ertical Position control to move the display up and down. A beep indicates the limits of the control range. (Positioning range is greater for waveform monitor than for vectorscope.) 8. HORIZ POS. Use the Horizontal Position control to move the display [...]

Connectors, Controls, Indicators 2–6 1780R-Series Operator ’ s Manual tion or variable sweep is selected, the cursor interval is magnified correspondingly . T o change the large knob assignment from one cursor to another , touch the quadrant labeled <CURSOR 1 / CURSOR 2>. The current assignment is outlined by a box. T iming cursors are no[...]

Connectors, Controls, Indicators 1780R-Series Operator ’ s Manual 2–7 Different lines can be displayed on the waveform and vector- scope CR T s, when that function is selected via the Line Select menu by touching <WFM = VECT> until <NO> is outlined. For softwar e versions 1.13 and up, installed in instruments SN B020100 and up: For [...]

Connectors, Controls, Indicators 2–8 1780R-Series Operator ’ s Manual Menu Access Switches NOTE . Detailed menu information is located in Section 3. 16. PRESET . This switch provides access to the Preset menu screen, which allows the user to store, recall, and name up to 12 complete instrument setups. 17. MEASURE. This switch provides access to[...]

Connectors, Controls, Indicators 1780R-Series Operator ’ s Manual 2–9 Probe 20. BNC Connector . This is the input connector for a X1 or X10 probe. 21. CAL OUT . This pin jack outputs the calibration signal used to compensate the X10 probe. DC Restorer must be OFF (page 1 of the Configure menu) and EXT REF must be selected. Display Mode Companio[...]

Connectors, Controls, Indicators 2–10 1780R-Series Operator ’ s Manual Figure 2–2: Right side of front panel Connectors, Controls, Indicators 2–10 1780R-Series Operator ’ s Manual Figure 2–2: Right side of front panel[...]

Connectors, Controls, Indicators 1780R-Series Operator ’ s Manual 2–1 1 NOTE . The following switch gr oups ar e companion switches: VECT / SCH & XY / PIX, P ARADE / OVERLA Y & W A VEFORM/ WFM + CAL. Refer to the preceding instructions entitled Companion Switch Example. Locations of the switches ar e shown in Figure 2–2. 22. VECT / SC[...]

Connectors, Controls, Indicators 2–12 1780R-Series Operator ’ s Manual T able 2–1: Possible Parade and Overlay Configurations (Cont.) Display Automatic Selections Possible Inputs * Overlay C H B1 an d C H B 2 , o r Cd C 3 r If TWO L IN E o r T H R EE L IN E op er a - s se e ed s r me re er ONE LINE or FIELD C H B1 an d C H B 3 , o r CH B2 and[...]

Connectors, Controls, Indicators 1780R-Series Operator ’ s Manual 2–13 and continuously increase the magnification factor . Magnifica- tion factors are shown in T able 2–2. T able 2–2: Waveform Magnification > tton Magni ication m sec/Div > Bu tton Setting Magni f ication Factor 1 Line 2 Line 3 Line Off X1 5.0 m s 10.0 m s 15.0 m s On[...]

Connectors, Controls, Indicators 2–14 1780R-Series Operator ’ s Manual 34. W A VEFORM (Control). Use this knob to control the amount of variable gain when V AR is selected. 35. VECTOR (Control). Use this knob to control the amount of variable gain when V AR is selected. 36. V AR / MAX (Switch). Push and release this switch to turn on the vector[...]

Connectors, Controls, Indicators 1780R-Series Operator ’ s Manual 2–15 NOTE . The thr ee INPUT switches ar e companion switches. Refer to the pr eceding Companion Switch Example. Input 39. A–B1 / B1–B2 / B1–B3. This switch selects from the following inputs for display: CH A minus CH B1, CH B1 minus CH B2, or CH B1 minus CH B3. Push and ho[...]

Connectors, Controls, Indicators 2–16 1780R-Series Operator ’ s Manual Rear Panel Connectors Connectors CH A, CH B1, CH B2, CH B3, EXT REF , and CW are high impedance bridging loop-through inputs. CH A, CH B1, CH B2, and CH B3 have either a grounded or floating shield, depending on the position of the grounding screw , which is located between [...]

Connectors, Controls, Indicators 1780R-Series Operator ’ s Manual 2–17 Figure 2–3: Rear-Panel Connectors Connectors, Controls, Indicators 1780R-Series Operator ’ s Manual 2–17 Figure 2–3: Rear-Panel Connectors[...]

Connectors, Controls, Indicators 2–18 1780R-Series Operator ’ s Manual 12. EXT HORIZ. The EXT HORIZ input connector allows external control of waveform monitor sweeps. A positive-going signal deflects the sweep from left to right. A 0 V to +5 V signal is required for full scale deflection (ICPM). 13. SERIAL POR T . This 9-pin D-type connector p[...]

Operating Instructions Operating Instructions[...]

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1780R-Series Operator ’ s Manual 3–1 Operating Instructions Large Knob And Associated Switches Timing Cursors Push the TIME switch to enable the timing cursors and obtain a menu on the vectorscope CR T . Use this menu to choose cursors that track together or are positioned separately , and to choose between locate and measure. When <SEP ARA [...]

Operating Instructions 3–2 1780R-Series Operator ’ s Manual For softwar e versions 1.13 and up, installed in instruments SN B020100 and up: The Timing Cursor dots are positioned on the V oltage Cursors while in Line Select mode, for ease in viewing the T iming Cursors. V oltage Cursors Push the VOL T AGE switch to enable the voltage cursors and[...]

Operating Instructions 1780R-Series Operator ’ s Manual 3–3 For softwar e versions 1.13 and up, installed in instruments SN B020100 and up: V oltage cursors are automatically enabled when in Line Select with T iming Cursors. Line Select This switch enables the line select function, which is available for both waveform and vectorscope. For wavef[...]

Operating Instructions 3–4 1780R-Series Operator ’ s Manual Figure 3–1: Line Select Menu Screen with <2 OF 4> Fields selected The waveform and vectorscope CR T s can be used to display the same selected line or different lines. T o display different lines, enable the Line Select menu, then touch <WFM = VECT> until <NO> is ou[...]

Operating Instructions 1780R-Series Operator ’ s Manual 3–5 Figure 3–2: Line Select Menu Screen with <1 OF 8> Fields selected For softwar e versions 1.13 and up: A dual Line Select mode is available for making ICPM measurements when in Line Select. It is described in Section 4, under ICPM Measur ement . Phase Shift This switch enables p[...]

Operating Instructions 3–6 1780R-Series Operator ’ s Manual Knob The Precision Measurement control (large knob) provides analog precision adjustments associated with the REFERENCE SET , LINE SELECT , PHASE, TIMING CURSOR, and VOL T AGE CURSOR switches, or as assigned by menu selections. The current function of this knob is circled on the CR T s[...]

Operating Instructions 1780R-Series Operator ’ s Manual 3–7 Figure 3–3: 1780R V ector Graticule The graticule includes four burst amplitude marks: 75% with setup, 75% with no setup, 100% with setup, and 100% with no setup. On the NTSC graticule, each chrominance vector terminates in a system of graticule targets in the form of two boxes (a sm[...]

Operating Instructions 3–8 1780R-Series Operator ’ s Manual amplitude centered around 100% standard amplitude. The dimen- sions of the smaller inner target represent ± 3 _ and ± 5% of chromi- nance amplitude. Note that the chrominance vectors associated with the –V burst are terminated in the smaller targets only . Figure 3–4: 1781R V ect[...]

Operating Instructions 1780R-Series Operator ’ s Manual 3–9 amplitude (3 dB), there are gaps in the horizontal and vertical axes. This calibration aid makes it possible to check the –3 dB points of the demodulator output amplifiers. Differential Gain and Phase Measurements. The 1780R-Series provides differential gain and phase measurements th[...]

Operating Instructions 3–10 1780R-Series Operator ’ s Manual XY INPUT Connector . The rear-panel XY INPUT connector is a 15-pin, sub-miniature, D-type connector that provides input to the Horizontal and V ertical (X and Y) Amplifiers. They are balanced (differential), DC-coupled, high impedance (>20 k W ), un-terminated inputs provided for a[...]

Operating Instructions 1780R-Series Operator ’ s Manual 3–1 1 Pin Number Function 1 –X Input 2 No Connection 3 +X Input 4 No Connection 5 –Y Input 6 No Connection 7 +Y Input 8 No Connection 9 –X Input 10 Ground 11 +X High Gain Input 12 Ground 13 –Y Input 14 No Connection 15 +Y High Gain Input Figure 3–5: Rear-panel X–Y Connector Pin[...]

Operating Instructions 3–12 1780R-Series Operator ’ s Manual Using The W aveform Graticule Basic W aveform Graticule Markings. The two basic 1780R-Series internal waveform graticules are the NTSC and P AL graticules. The NTSC graticule is shown in Figure 3–6, and the P AL graticule is shown in Figure 3–7. External graticules (short time dis[...]

Operating Instructions 1780R-Series Operator ’ s Manual 3–13 Figure 3–7: 1781R W aveform Graticule Graticule horizontal scales are divided into 12.7 divisions along the horizontal line at blanking level. The vertical graduations are scaled according to measuring units and ranges unique to each system – mV for the CCIR graticule, and IRE uni[...]

Operating Instructions 3–14 1780R-Series Operator ’ s Manual of the bar . Use the ± 2% and ± 5% graticule marks to quantify the peak-to-peak deviation of the bar top (tilt or rounding) within the structure. The vertical gain can be increased to measure small errors. (When the X5 setting is selected, the graticule marks correspond to ± 0.4% a[...]

Operating Instructions 1780R-Series Operator ’ s Manual 3–15 Remote Operation REMOTE Connector The rear-panel REMOTE connector is a subminiature 15-pin D-type receptacle with female contacts. All the active Remote control lines are enabled by remote ground closures or TTL levels (0 V to +0.8 V). Pin assignments for the REMOTE connector are show[...]

Operating Instructions 3–16 1780R-Series Operator ’ s Manual a. T o recall a preset, force the corresponding remote line low . b. T o store a front-panel configuration at a preset location, apply a low first to the Store line (pin 1 1) and then to the desired preset. Alternately , the Store line and desired preset line may be forced low simulta[...]

Operating Instructions 1780R-Series Operator ’ s Manual 3–17 T able 3–2: Remote Pin Functions (Cont.) Pin Function Name 9 Ground 10 Remote Sync Input 5 k W input impedance to ground. Polarity set by jumper A2J192. Factory set for positive polarity . 11 / Store Low = Store. Used with pin 5, 6, 7, 8, 12, 13, 14, or 15. 12 / Preset 8 Low with Pi[...]

Operating Instructions 3–18 1780R-Series Operator ’ s Manual Serial Communications Interface Serial Interface Connector The rear-panel SERIAL interface connector is a 9-pin, sub-minia- ture, D-type connector . It is used as an RS422A or RS232D interface to the 1780R-Series microcontroller . Drivers for both interfaces are resident. RS422A is a [...]

Operating Instructions 1780R-Series Operator ’ s Manual 3–19 9-Pin Male Connector Figure 3–10: Serial Interface Connector Wiring Converter Serial Remote Information 1780R-Series instrument configurations can be stored at (and retrieved from) a remote location. T o accomplish this, the 1780R-Se- ries is connected to a host computer through a s[...]

Operating Instructions 3–20 1780R-Series Operator ’ s Manual T able 3–3: Serial Remote Commands to the 1780R-Series Command* Function Results #U or #u UPLOAD 1780R-Series sends a stream of data, representing the current instrument configuration, to the host computer . #D or #d DOWNLOAD 1780R-Series expects a stream of data representing an ins[...]

Operating Instructions 1780R-Series Operator ’ s Manual 3–21 The data stream transmitted to and from the host (representing the current 1780R-Series settings) consists of 512 bytes, followed by a one-byte checksum. All data bytes are in the range of Hex 20 to Hex 7F , so that they are printable ASCII characters. SCH Display NOTE . Switch functi[...]

Operating Instructions 3–22 1780R-Series Operator ’ s Manual EXT REF setting: only one dot appears on the vectorscope compass rose. This relative mode allows the comparison of the color framing of two signals. The two signals are color framed when the sync dot is within 90 _ of the burst vector . SCH Phase Measurement Procedure 1. Select the SC[...]

Operating Instructions 1780R-Series Operator ’ s Manual 3–23 Parade Operation NOTE . Switch function is further described in Section 2. Select the Parade mode of operation by pushing the P ARADE/ OVERLA Y button, shown in Figure 3–1 1, until the Parade LED lights. T wo pushes may be required, depending on the previous condition. If One Line o[...]

Operating Instructions 3–24 1780R-Series Operator ’ s Manual Figure 3–12: Offsets Menu Screen T o obtain Offset menu, touch <OFFSET MENU> until <ON> is outlined. T ouch <OFFSET> until <V AR> is outlined, and touch CHB2 or CHB3 to assign large knob function to desired of fset. Large knob assignment will be circled. Usin[...]

Operating Instructions 1780R-Series Operator ’ s Manual 3–25 DC Level Measurement Procedure 1. Enter the Parade mode. Press the CONFIGURE button and then use the vectorscope touch screen to select <GND> under the <COUPLING> area. Press the CH B1 / CH B2 / CH B3 switch to go to Three Line. 2. Ensure that the button under the WFM CR T[...]

Operating Instructions 3–26 1780R-Series Operator ’ s Manual Overlay Operation NOTE . Switch function is further described in Section 2. Select the Overlay mode of operation by pushing the P ARADE/ OVERLA Y button, shown in Figure 3–1 1, until the Overlay LED lights. T wo pushes may be required, depending on the previous condition. The instru[...]

Operating Instructions 1780R-Series Operator ’ s Manual 3–27 WFM + CAL NOTE . Switch function is further described in Section 2. Enter WFM+CAL Mode Select the WFM+CAL mode of operation by pushing the WFM / WFM+CAL button, shown in Figure 3–1 1, until the WFM+CAL LED lights. T wo pushes may be required, depending on the previous condition. The[...]

Operating Instructions 3–28 1780R-Series Operator ’ s Manual    Figure 3–13: WFM + CAL Readout with ABS selected    Figure 3–14: WFM + CAL Readout with REL selected Operating Instructions 3–28 1780R-Series Operator ’ s Manual  [...]

Operating Instructions 1780R-Series Operator ’ s Manual 3–29 When operating in the <V AR> mode, software versions 1.11 & Up provide a choice of absolute or relative readouts. When <ABS> is selected, the readout appears in IRE or mV . (For an IRE readout, <IRE> must be selected on page 2 of the Configure menu.) When <REL[...]

Operating Instructions 3–30 1780R-Series Operator ’ s Manual 2. Use the large knob to align a horizontal reference point (usually the sync tip) of one display with the white bar of the second display . 3. Push the REF SET button and obtain a CAL readout of 0.00 dB and 100.0%. 4. Relative burst amplitude is measured in the same manner as absolut[...]

Operating Instructions 1780R-Series Operator ’ s Manual 3–31 equal that value when the back porch of one display is aligned with the white bar of the second display . c. The 700 mV (98.0 IRE) calibrator amplitude (NTSC and P AL) can be used to adjust component levels for component video. d. The 300 mV (P AL) calibrator amplitude is used for adj[...]

Operating Instructions 3–32 1780R-Series Operator ’ s Manual Many selections are made by touching the desired word on the CR T screen, as shown in Figure 3–15. This is indicated by the use of the word ‘touch’ (as opposed to ‘push’ for front-panel switches). The touch screen menu quadrants are illustrated as a documentation tool, and d[...]

Operating Instructions 1780R-Series Operator ’ s Manual 3–33 Figure 3–16: T ouch Screen 4 X 4 Matrix The touch screens are light sensitive, so it is not necessary to apply pressure. If it is necessary to adjust quadrant center points, refer to the 1780R-Series Service Manual . Operating Instructions 1780R-Series Operator ’ s Manual 3–33 F[...]

Operating Instructions 3–34 1780R-Series Operator ’ s Manual Password Menu Figure 3–17: Password Menu Screen Enable / Disable the Password T o enable password operation, place button #2 of S385 (MPU board) in the closed position. T urn the instrument power to standby and back to on for the microprocessor to recognize the new switch setting. D[...]

Operating Instructions 1780R-Series Operator ’ s Manual 3–35 2, 3, and 4). That password is then stored, and remains in memory , even when the instrument power is turned to standby and back to on. Change the Password Move button #2 of S385 (MPU board) to the open position to disable password operation. Apply power to the instrument. Follow prec[...]

Operating Instructions 3–36 1780R-Series Operator ’ s Manual Preset Menu Figure 3–18: Preset Menu Screen Recall Recall Preset Settings. Push PRESET button to enter Preset menu, shown in Figure 3–18. Recall desired preset by touching the preset name. Example: <PRESET 9>. Instrument is reset to configuration stored under that preset, me[...]

Operating Instructions 1780R-Series Operator ’ s Manual 3–37 If a Measure menu selection (for example, user-modified R–Y SWEEP setup) has been stored at a Preset location, recalling it will cause the instrument to reenter the stored measurement mode (R–Y SWEEP in this example), turning on both Preset and Measure LEDs. Exit Preset Menu. Use [...]

Operating Instructions 3–38 1780R-Series Operator ’ s Manual T able 3–5: Initial Settings (Cont.) Control Setting Control Setting COUPLING AC BEEP On FIELD TRIG F1 BAUD RA TE 9600 SLOW SWEEP TRIG + PROBE GAIN X1 FRONT INPUT HI Z CLAMP BP VECTOR P AL (1781R only) ABS UNITS IRE (1780R) mV (1781R) The Preset menu LED will stay on until the menu [...]

Operating Instructions 1780R-Series Operator ’ s Manual 3–39 As soon as any right-side front-panel control setting is changed, the instrument settings (as configured before that change) are saved, and the Preset menu is exited. T o recover saved configuration, push the PRESET button again, and then touch <RECOVER>. If the Preset menu is e[...]

Operating Instructions 3–40 1780R-Series Operator ’ s Manual Name Renaming a PRESET : H Push the PRESET button to enter Preset menu. H T ouch <Name>. If password is enabled, enter the password now . H <RENAME WHICH?> is added to the display . <ST ORE>, <RECOVER>, <NAME>, and <INIT> are omitted. H T ouch the p[...]

Operating Instructions 1780R-Series Operator ’ s Manual 3–41 Figure 3–19: Name Menu Screen Operating Instructions 1780R-Series Operator ’ s Manual 3–41 Figure 3–19: Name Menu Screen[...]

Operating Instructions 3–42 1780R-Series Operator ’ s Manual Calibrate Menu General Calibration Menu Information The Calibrate menu is available for both vector and waveform, and uses both CR T s. Pushing the front-panel CALIBRA TE button provides access to the menu. Several calibration features (such as Readout Intensity) can be selected using[...]

Operating Instructions 1780R-Series Operator ’ s Manual 3–43 W aveform Calibration Procedure 1. Apply a video signal to a 1780R-Series input channel and select that channel for display . 2. Push the front-panel CONFIGURE button and touch <FIXED CAL AMPL> until 1000 (1.0 volt) is outlined. 3. Push the front-panel CALIBRA TE button. If Pass[...]

Operating Instructions 3–44 1780R-Series Operator ’ s Manual Left CRT display Right CRT display Figure 3–20: W aveform Calibration Menu Display Operating Instructions 3–44 1780R-Series Operator ’ s Manual Left CRT display Right CRT display Figure 3–20: Waveform Calibration Menu Display[...]

Operating Instructions 1780R-Series Operator ’ s Manual 3–45 7. T ouch <CAL AMPL ZERO SET> to obtain a menu on the waveform CR T for adjusting the calibrator zero level. Adjust the large knob to overlay the two calibrator waveforms. Press the front-panel REFERENCE SET button to record this zero setting. 8. T ouch <VOL T CURSORS ZERO SE[...]

Operating Instructions 3–46 1780R-Series Operator ’ s Manual i. T ouch <EXT HORIZ CAL>. The large knob will now adjust sweep length (time) with respect to the graticule. Do not change the MAG setting (automatically set to 100 mV/div). Adjust the large knob for a horizontal display of 10 divisions. V ectorscope Calibration Information READ[...]

Operating Instructions 1780R-Series Operator ’ s Manual 3–47 Left CRT display Right CRT display Figure 3–21: V ectorscope Calibration Menu Display for 1780R (NTSC), software versions 1.1 1 & Up, with CAL OSC Off Operating Instructions 1780R-Series Operator ’ s Manual 3–47 Left CRT display Right CRT display Figure 3–21: V ectorscope [...]

Operating Instructions 3–48 1780R-Series Operator ’ s Manual Left CRT display Right CRT display Figure 3–22: V ectorscope Calibration Menu Display for 1780R (NTSC), software versions 1.1 1 & Up, with CAL OSC On Operating Instructions 3–48 1780R-Series Operator ’ s Manual Left CRT display Right CRT display Figure 3–22: V ectorscope C[...]

Operating Instructions 1780R-Series Operator ’ s Manual 3–49 For 1781R (P AL), touch <GAIN CAL> and use the large knob to make the circle match the compass rose. b. T ouch <CAL OSC> until <OFF> is outlined. 6. T o check the V ectorscope Gain adjustment, push the front-panel CALIBRA TE button to enter the Calibration menu, then[...]

Operating Instructions 3–50 1780R-Series Operator ’ s Manual Left CRT display Right CRT display Figure 3–23: V ectorscope Calibration Menu Display for 1781R (P AL) all software versions, and for 1780R (NTSC) software versions 1.10 & Below Operating Instructions 3–50 1780R-Series Operator ’ s Manual Left CRT display Right CRT display F[...]

Operating Instructions 1780R-Series Operator ’ s Manual 3–51 3. <READOUT INTENSITY> will be circled, and a test readout will be displayed. Use the large knob to adjust intensity . (The front-panel INTENSITY control adjusts signal intensity only . Readout intensity must be adjusted through the Calibration menu.) 4. T ouch <TRACE ROT A T[...]

Operating Instructions 3–52 1780R-Series Operator ’ s Manual Configure Menu Changing Configurations Push the CONFIGURE button to enter the Configure menu. All front-panel controls remain operational during Configure menu operation. The Configure menu is a three-page menu, shown in Figures 3–24, 3–25, and 3–26. Page one of the menu is disp[...]

Operating Instructions 1780R-Series Operator ’ s Manual 3–53 Left CRT display Figure 3–24: Configure Menu Screen, page 1 T able 3–6: Configure Menu Selections, page 1 SYNC Direct or Auto Frequency Controlled wfm sync. COUPLING AC / DC coupling or ground reference, sets all four inputs. (The probe input is always AC coupled.) When GND is sel[...]

Operating Instructions 3–54 1780R-Series Operator ’ s Manual Left CRT display Figure 3–25: Configure Menu Screen, page 2 T able 3–7: Configure Menu Selections, page 2 BARS V ectorscope can be calibrated to 75% or 100% color bars. PHASE DISPLA Y 360 = Phase reads from 0 _ to 360 _ . 180 = Phase reads from +180 _ to –179.95 _ . VECT GRA T S[...]

Operating Instructions 1780R-Series Operator ’ s Manual 3–55 Left CRT display Figure 3–26: Configure Menu Screen, page 3 T able 3–8: Configure Menu Selections, page 3 CW SYNC When CW subcarrier is used for vectorscope reference, wfm sync source can be INT or EXT . SLOW SWP TRIG Select positive or negative transition of the input signal to t[...]

Operating Instructions 3–56 1780R-Series Operator ’ s Manual Measure Menu Left CRT display Figure 3–27: Measure Menu Screen Using the Measure Menu Push the front-panel MEASURE button to enter the Measurement menu, illustrated in Figure 3–27. T o select a measurement type, touch the desired measurement on the screen. (Selections are describe[...]

Operating Instructions 1780R-Series Operator ’ s Manual 3–57 Front-panel and menu settings are automatically adjusted to accommodate the selected measurement. T o exit a measurement mode, push the front-panel MEASURE button. In the case of DIFF PHASE and DIFF GAIN measurements, touch <GO TO DIFF GAIN> and <GO T O DIFF PHASE> areas o[...]

Operating Instructions 3–58 1780R-Series Operator ’ s Manual After both Preset and Measure menus have been exited, push the PRESET button and touch the appropriate preset. The stored measurement mode, including the user modifications, will be recalled. Both Preset and Measure LEDs will be on. Making Measurements Detailed instructions for each m[...]

Measurements Measurements[...]

[...]

1780R-Series Operator ’ s Manual 4–1 Measurements Measurement Information Figure 4–1: Measure Menu Access NOTE . The measur ements described in this section ar e accessed thr ough the Measur ement menu, shown in Figur e 4–1. Push the front-panel MEASURE button to enable the Measurement menu. T o access a desired measurement mode, touch the [...]

Measurements 4–2 1780R-Series Operator ’ s Manual measurements, touch the <GO TO DIFF PHASE> and <GO T O DIFF GAIN> areas of the screen to alternate between those two measurement modes. T o perform additional measurements, push the MEASURE button and touch the next desired measurement. Differential Phase Measurement Enter DIFF PHASE[...]

Measurements 1780R-Series Operator ’ s Manual 4–3 Right CRT display Left CRT display Figure 4–2: Differential Phase Measurement Measurements 1780R-Series Operator ’ s Manual 4–3 Right CRT display Left CRT display Figure 4–2: Differential Phase Measurement[...]

Measurements 4–4 1780R-Series Operator ’ s Manual T able 4–1: DIFF PHASE Front-Panel Configuration VECTORSCOPE V ector display enabled, other choices locked out. W A VEFORM R–Y sweep displayed, all front-panel choices locked out. (There is no LED to indicate R–Y sweep.) INPUT Status does not change. All differential modes locked out; if a[...]

Measurements 1780R-Series Operator ’ s Manual 4–5 NOTE . Fr eeze only available with Noise Reduction ON. Freeze. T o capture the display (right CR T only), touch <NOISE REDUCTION> so that <ON> is outlined, then touch <FREEZE>. <FREEZE> will be outlined. The captured display remains on the screen even if the input signal [...]

Measurements 4–6 1780R-Series Operator ’ s Manual 3. Use the vectorscope variable gain control to set the amplitude of the chroma to be measured to the edge of the compass rose. 4. Use the large knob to set the phase of the chroma to be measured to the nine o’clock position. See Figure 4–3. 5. Use the W aveform V ertical Position control to[...]

Measurements 1780R-Series Operator ’ s Manual 4–7 2. Line Select readout is provided on the waveform CR T . Make sure the Line number is circled. If it is not, touch the screen in that area. 3. T ouch <MENU> to outline <ON> for Line Select menu display on the vectorscope CR T . Make Line select menu choices as desired. 4. Use large [...]

Measurements 4–8 1780R-Series Operator ’ s Manual Left CRT display Right CRT display Figure 4–3: Differential Gain Measurement Measurements 4–8 1780R-Series Operator ’ s Manual Left CRT display Right CRT display Figure 4–3: Differential Gain Measurement[...]

Measurements 1780R-Series Operator ’ s Manual 4–9 T able 4–2: DIFF GAIN Front-Panel Configuration VECTORSCOPE V ector display enabled, other choices locked out. W A VEFORM Demodulated sweep displayed, all front-panel choices locked out. (There is no LED to indicate demodulated sweep.) INPUT Status does not change. All differential modes locke[...]

Measurements 4–10 1780R-Series Operator ’ s Manual The captured display remains on the screen even if the input signal is removed. The display is lost when the DIFF GAIN menu is exited by any method, including touching <GO TO DIFF PHASE>, pushing any of the four front-panel menu buttons, pushing the front-panel LINE SELECT button to enter[...]

Measurements 1780R-Series Operator ’ s Manual 4–1 1 6. Differential gain is the amount of signal that is above or below the graticule reference mark. Read the amount directly off the graticule scale (waveform CR T); 1 major division = 1% (10 IRE NTSC or 100 mV P AL). Double-T race DIFF GAIN Measurement Procedure 1. Apply a staircase signal or a[...]

Measurements 4–12 1780R-Series Operator ’ s Manual Simultaneous Diff Phase & Diff Gain Measurements Enter DP & DG Mode Push the MEASURE button to enable the Measurement menu, shown in Figure 4–1. T ouch <DP & DG> on the screen to enable simultaneous differential phase and differential gain measurements. The DP & DG menu [...]

Measurements 1780R-Series Operator ’ s Manual 4–13 Right CRT display Left CRT display Figure 4–4: DP & DG Measurement Measurements 1780R-Series Operator ’ s Manual 4–13 Right CRT display Left CRT display Figure 4–4: DP & DG Measurement[...]

Measurements 4–14 1780R-Series Operator ’ s Manual T able 4–3: DP & DG Front-Panel Configuration VECTORSCOPE V ector display enabled, other choices locked out. W A VEFORM Demodulated sweep displayed, all front-panel choices locked out. (There is no LED to indicate demodulated sweep.) INPUT Status does not change. All differential modes lo[...]

Measurements 1780R-Series Operator ’ s Manual 4–15 settings will be stored and recalled at next entry to DP & DG mode. The amount of distortion is read from the graticule scale. DIFF PHASE & DIFF GAIN Measurement Procedure 1. Apply a staircase signal or a ramp signal with subcarrier to the 1780R-Series. 2. T ouch <DP & DG>. 3.[...]

Measurements 4–16 1780R-Series Operator ’ s Manual Noise Measurement Enter Noise Measurement Mode Push the MEASURE button to enable the Measurement menu, shown in Figure 4–1. T ouch <NOISE> on the screen. Exit Noise Measurement Mode T o exit Noise mode, push the MEASURE button again. All instrument settings return to their previous stat[...]

Measurements 1780R-Series Operator ’ s Manual 4–17 ICPM Measurement Enter ICPM Measurement Mode (Incidental Carrier Phase Modulation) Push the MEASURE button to enable the Measurement menu, shown in Figure 4–1. T ouch <ICPM> on the screen. The instrument is now configured as specified in T able 4–4. T able 4–4: ICPM Front-Panel Conf[...]

Measurements 4–18 1780R-Series Operator ’ s Manual The 1780R-Series ICPM measurement method is similar to the T ektronix 1480-Series method. Refer to the 1450 manual for details on configuring the demodulator for this measurement. The external low-pass filters (T ektronix P/N 015-0352-00) can be used to improve the display . ICPM Measurement Pr[...]

Measurements 1780R-Series Operator ’ s Manual 4–19 5. The 1780R-Series on-screen readout shows the ICPM phase error in degrees. Figure 4–5: Making ICPM Measurements Measurements 1780R-Series Operator ’ s Manual 4–19 5. The 1780R-Series on-screen readout shows the ICPM phase error in degrees. Figure 4–5: Making ICPM Measurements[...]

Measurements 4–20 1780R-Series Operator ’ s Manual K Factor Measurement Enter K Factor Mode Push the MEASURE button to enable the Measurement menu, shown in Figure 4–1. T ouch <K F ACTOR> on the screen. K F ACTOR is displayed on the left CR T . The input signal and electronic graticule are displayed on the right CR T . The instrument is[...]

Measurements 1780R-Series Operator ’ s Manual 4–21 Left CRT display Right CRT display Figure 4–6: K Factor Electronic Graticule Measurements 1780R-Series Operator ’ s Manual 4–21 Left CRT display Right CRT display Figure 4–6: K Factor Electronic Graticule[...]

Measurements 4–22 1780R-Series Operator ’ s Manual T able 4–5: K Factor Front-Panel Configuration VECTORSCOPE Selected by operator W A VEFORM Waveform display enabled, choices locked out INPUT Selected by operator REFERENCE Status does not change FIL TER Status does not change WFM SWEEPS One Line sweep selected, other choices may be selected [...]

Measurements 1780R-Series Operator ’ s Manual 4–23 Chroma / Luma Inequalities Measurement Enter Chroma / Luma Mode Push the MEASURE button to enable the Measurement menu, shown in Figure 4–1. T ouch <CHROMA / LUMA> on the screen. V ectorscope and waveform displays are enabled and the instrument is now configured as shown in Figure 4–7[...]

Measurements 4–24 1780R-Series Operator ’ s Manual Right CRT display Left CRT display Figure 4–7: Initial Chroma / Luma Inequalities Measurement Screen Measurements 4–24 1780R-Series Operator ’ s Manual Right CRT display Left CRT display Figure 4–7: Initial Chroma / Luma Inequalities Measurement Screen[...]

Measurements 1780R-Series Operator ’ s Manual 4–25 T able 4–6: Chroma / Luma Front-Panel Configuration VECTORSCOPE V ector display initially enabled, other choices locked out. Chroma-to-Luma Lissajous display selected by touching <VECTOR / C/Y> area of screen. W A VEFORM Waveform display enabled, other choices locked out. INPUT Status d[...]

Measurements 4–26 1780R-Series Operator ’ s Manual If OTHER was selected on Step 1, this step allows the 1780R-Se- ries instrument to determine the pulse width and adjust the readout accordingly . a. V oltage cursors are automatically set to 50% of the amplitude entered in step 2. b. T iming cursors are enabled and appear as bright-up dots on t[...]

Measurements 1780R-Series Operator ’ s Manual 4–27 Chroma / Luma Measurements with Lissajous Display The Lissajous display is an X/Y plot of the sine-squared luminance pulse versus the sine-squared envelope of the demodulated chrominance. This display is useful when signals have previously been transcoded into a component format, so that R–Y [...]

Measurements 4–28 1780R-Series Operator ’ s Manual Short-Time Distortion Measurement Enter Short-Time Distortion Mode Push the MEASURE button to enable the Measurement menu, shown in Figure 4–1. T ouch <SHOR T -TIME DISTOR TION> on the screen. V ectorscope and waveform displays are enabled and the instrument is now configured as shown i[...]

Measurements 1780R-Series Operator ’ s Manual 4–29 Left CRT display Right CRT display Figure 4–9: Short-Time Distortion Electronic Graticule Measurements 1780R-Series Operator ’ s Manual 4–29 Left CRT display Right CRT display Figure 4–9: Short-Time Distortion Electronic Graticule[...]

Measurements 4–30 1780R-Series Operator ’ s Manual T able 4–7: Short-Time Distortion Mode Front-Panel Configuration VECTORSCOPE Selected by operator W A VEFORM Waveform display enabled, other choices may be selected by operator INPUT Status does not change REFERENCE Status does not change FIL TER Flat is selected, other choices are locked up [...]

Measurements 1780R-Series Operator ’ s Manual 4–31 R–Y Sweep Measurement Enter R–Y Sweep Mode Push the MEASURE button to enable the Measurement menu, shown in Figure 4–1. T ouch <R–Y SWEEP> on the screen. V ectorscope and waveform displays are enabled and the instrument is now configured as shown in T able 4–8. T able 4–8: R?[...]

Measurements 4–32 1780R-Series Operator ’ s Manual Using R–Y Sweep Mode 1. Set the burst to 180 _ on the vector graticule. The R–Y compo- nent of the input signal is viewed on the waveform CR T . 2. Set the front-panel VECT / SCH INPUT selection to SCH, and the SCH Phase component is added to the R–Y display . The SCH Phase display is pro[...]

Measurements 1780R-Series Operator ’ s Manual 4–33 Bowtie Measurement Use the following information to perform bowtie measurements. Enter Bowtie Measurement Mode Push the MEASURE button to enable the Measurement menu, shown in Figure 4–1. T ouch <BOWTIE> on the screen. BOWTIE is displayed on the left CR T . The CH B1–B2 and CH B1–B3[...]

Measurements 4–34 1780R-Series Operator ’ s Manual Right CRT display Left CRT display Figure 4–10: Bowtie Measurement Screen Measurements 4–34 1780R-Series Operator ’ s Manual Right CRT display Left CRT display Figure 4–10: Bowtie Measurement Screen[...]

Measurements 1780R-Series Operator ’ s Manual 4–35 T able 4–9: Bowtie Mode Front-Panel Configuration VECTORSCOPE Selected by operator W A VEFORM Parade selected, other choices locked INPUT B1–B2 & B1–B3 selected, other choices locked REFERENCE Status does not change FIL TER Status does not change WFM SWEEPS T wo Line selected, other c[...]

Measurements 4–36 1780R-Series Operator ’ s Manual F SC Time Marks Measurement Enter F SC Time Marks Measurement Mode Push the MEASURE button to enable the Measurement menu, shown in Figure 4–1. T ouch <FSC TIME MARKS> on the screen. The large knob function is assigned to phase shift. The instrument is now configured as specified in T a[...]

Measurements 1780R-Series Operator ’ s Manual 4–37 Making SCH Phase Measurements The 1780R-Series offers two methods of measuring SCH phase errors: The polar SCH display , and this F SC T ime Marks (voltage-vs- time) method. The F SC time marks display is more direct than the polar display , and affords the operator more manual control, but may[...]

Measurements 4–38 1780R-Series Operator ’ s Manual Other Measurements The 1780R-Series instruments are capable of other measurements not described in this manual, such as Group Delay and Chrominance Non-Linear Phase and Gain. These measurements and others are covered in the book, T elevision Measur ements , available through T ektronix Customer[...]

Specifications Specifications[...]

[...]

1780R-Series Operator ’ s Manual 5–1 Specifications T able 5–1: Input/Output Characteristics Performance Requirements Supplemental Information V ertical Ranges V olts Full Scale 1.0 Accuracy – 1.0 V ± 0.007 V . P-to-P Amplitude for Full Graticule. 1.0 volt / 140 IRE. Va r ≤ 0.5:1 to ≥ 1.5:1 (0.67 V to 2.0 V input signal can be made ful[...]

Specifications 5–2 1780R-Series Operator ’ s Manual T able 5–1: Input/Output (Cont.) Characteristics Supplemental Information Performance Requirements Max volts from Loop- Through common terminal to chassis 2 V rms at mains frequency . Rejection ratio of common- to-chassis in floating ground mode, ≥ 34 dB at mains frequency . Max DC Output [...]

Specifications 1780R-Series Operator ’ s Manual 5–3 T able 5–2: Waveform Monitor V ertical System (Cont.) Characteristics Supplemental Information Performance Requirements Crosstalk T ypically 70 dB isolation between channels. Mea- sured at F SC between channels and each channel and EXT REF . Frequency Response Flat (X1) From 50 kHz Reference[...]

Specifications 5–4 1780R-Series Operator ’ s Manual T able 5–2: Waveform Monitor V ertical System (Cont.) Characteristics Supplemental Information Performance Requirements Cal Amplitude Accuracy 1.00 V ± 0.2%. NTSC 0.714 V ± 0.5%. Resolution 1 mV at 1.00 V . P AL 0.700 V ± 0.5%. DC Restorer Clamp Point Back porch or Sync Tip. Mains Hum Att[...]

Specifications 1780R-Series Operator ’ s Manual 5–5 T able 5–2: Waveform Monitor V ertical System (Cont.) Characteristics Supplemental Information Performance Requirements V ertical Overscan Baseline Distortion <7 mV variation in baseline of chroma when positioned any- where between sync tip and 100% white. 1 V p-to-p P AL or NTSC Modulate[...]

Specifications 5–6 1780R-Series Operator ’ s Manual T able 5–2: Waveform Monitor V ertical System (Cont.) Characteristics Supplemental Information Performance Requirements Diff Steps (Differentiated Steps Attenuation) >40 dB at 3.58 MHz (4.43 MHz P AL) 5 step, 20 IRE staircase within 2% of flat display . V ertical Gain increase approximate[...]

Specifications 1780R-Series Operator ’ s Manual 5–7 T able 5–3: Waveform Monitor Probe Input Characteristics Performance Requirements Supplemental Information Input Resistance 1 M W . Input RC Product 20 m s (20 pF). Gain Unity 3%. With gain adjusted for equivalent 1 V p-to-p dis- play . Frequency Response 25 Hz to 5 MHz ± 2%. F r o m 50 kHz[...]

Specifications 5–8 1780R-Series Operator ’ s Manual T able 5–4: W aveform Monitor Horizontal Deflection System (Cont.) Characteristics Supplemental Information Performance Requirements 1 Field Sweep Displays 1 full field includ- ing vertical interval. 2 Field Sweep Displays 2 full fields and the vertical interval between them. First sweep (le[...]

Specifications 1780R-Series Operator ’ s Manual 5–9 T able 5–4: W aveform Monitor Horizontal Deflection System (Cont.) Characteristics Supplemental Information Performance Requirements Magnified Sweep Accuracy X5 (1 m s/Div .) ± 1%. A ppli es to th e c e nt er 10 ds s f m f e d X10 (0.5 m s/Div .) ± 2%. d ivi s ion s o f un m agni f i ed s [...]

Specifications 5–10 1780R-Series Operator ’ s Manual T able 5–4: W aveform Monitor Horizontal Deflection System (Cont.) Characteristics Supplemental Information Performance Requirements RGB/YRGB Staircase Input Amplitude A +10 V input will result in a horizontal display of 9 divisions ± 1.4 major divisions. Ground to +10 V . +10 V correspond[...]

Specifications 1780R-Series Operator ’ s Manual 5–1 1 T able 5–5: Waveform Monitor DG and DP Display Characteristics Performance Requirements Supplemental Information Differential Gain Deflection Factor 5% dG deflects the trace 50 IRE (NTSC) or 500 mV (P AL) ± 5%. W aveform gain X1, V ar . gain off. V ector gain ad- justed to place chroma at[...]

Specifications 5–12 1780R-Series Operator ’ s Manual T able 5–5: Waveform Monitor DG and DP Display (Cont.) Characteristics Supplemental Information Performance Requirements Recursive Filter Noise Reduction ≈ 15 dB signal-to-noise reduction with filter se- lected. Assumes white noise source. Cross-Luminance Rejection ≈ 30 dB with filter s[...]

Specifications 1780R-Series Operator ’ s Manual 5–13 T able 5–6: Synchronization Characteristics Performance Requirements Supplemental Information Sync Input Internal Ref. Sync Separator 0.2 to 2.0 V peak-to-peak composite video. Composite video applied to Inputs A, B1, B2, or B3 or probe. Int. Sync Separator 0.5 to 2.0 V peak-to-peak composi[...]

Specifications 5–14 1780R-Series Operator ’ s Manual T able 5–6: Synchronization (Cont.) Characteristics Supplemental Information Performance Requirements AFC Sync Horiz. Freq. Range 15.75 kHz ± 200 Hz. Lock-In Time <1 second. Sync Jitter Comp sync or video ≤ 10 n s ; with th e a dd ition o f 36 dB white noise, ≤ 12 ns. V ariable APL [...]

Specifications 1780R-Series Operator ’ s Manual 5–15 T able 5–6: Synchronization (Cont.) Characteristics Supplemental Information Performance Requirements Remote Sync Amplitude 2.0 to 5.0 V square wave, or 4.0 V composite sync. Input enabled through rear-panel REMOTE con- nector . Input Impedance 1 M W . Frequency 30/60 Hz (NTSC), 25/50 Hz (P[...]

Specifications 5–16 1780R-Series Operator ’ s Manual T able 5–7: V ectorscope V ector Display (Cont.) Characteristics Supplemental Information Performance Requirements Display V ector Phase Accuracy ± 1.25 _ . Measured with color bar signal. V ector Gain Accuracy ± 2.5% (1.25 IRE). Quadrature Phasing ± 0.5 _ . Subcarrier Regenerator Pull-I[...]

Specifications 1780R-Series Operator ’ s Manual 5–17 T able 5–7: V ectorscope V ector Display (Cont.) Characteristics Supplemental Information Performance Requirements V ector Display Differential Phase ≤ 1 _ . Differential Gain ≤ 1%. Measured with 140 IRE (1 V) linearity signal with 40 IRE (300 mV) of subcarrier . Position Control Range [...]

Specifications 5–18 1780R-Series Operator ’ s Manual T able 5–8: V ectorscope XY Display Characteristics Performance Requirements Supplemental Information Input DC coupled differential inputs through rear-panel connector . Input Amplitude 2 to 9 V peak-to-peak. Adjustable full scale deflec- tion 0 dBm to +12 dBm for 600 W system. Factory set [...]

Specifications 1780R-Series Operator ’ s Manual 5–19 T able 5–9: V ectorscope SCH Phase Display (Cont.) Characteristics Supplemental Information Performance Requirements Input Timing Stable display with any time relationship between sig- nals on CH A, CH B, and EXT . Display Range Ext Reference 360 _ . Int Reference ± 70 _ . T ypically >8[...]

Specifications 5–20 1780R-Series Operator ’ s Manual T able 5–1 1: Power Requirements Characteristics Performance Requirements Supplemental Information Mains V oltage Ranges 1 10 V AC 90 – 132 V . S e l e ct ed b y re a r- pan e l s 220 V AC 200 – 250 V . s witch. Mains Frequency Range 48 – 66 Hz. Crest Factor ≥ 1.3. Power Consumption[...]

Specifications 1780R-Series Operator ’ s Manual 5–21 T able 5–13: Environmental Summary Characteristics Supplemental Information T emperature Operating 0 _ C to +50 _ C. Non-Operating –55 _ C to +75 _ C. Altitude Operating T o 2 km maximum. Vibration Operating 0.015 inch (0.38 mm) peak-to-peak 10 –55 Hz, 75 minutes total. Shock Non-Operat[...]

Specifications 5–22 1780R-Series Operator ’ s Manual T able 5–14: Certifications and compliances EC Declaration of Conformity – EMC 1 Meets intent of Directive 89/336/EEC for Electromagnetic Compatibility . Compliance was demonstrated to the following specifications as listed in the Official Journal of the European Communities: EN 50081-1 E[...]

Specifications 1780R-Series Operator ’ s Manual 5–23 T able 5–14: Certifications and compliances (Cont.) Pollution Degree 1 No pollution or only dry , nonconductive pollution occurs. Products in this category are generally encapsulated, hermetically sealed, or located in clean rooms. Pollution Degree 2 Normally only dry , nonconductive pollut[...]

Specifications 5–24 1780R-Series Operator ’ s Manual T able 5–14: Certifications and compliances (Cont.) Altitude (maximum operating) 2000 meters Equipment T ype T est and measuring Safety Class Class 1 (as defined in IEC 1010-1, Annex H) – grounded product Overvoltage Category Overvoltage Category II (as defined in IEC 1010-1, Annex J) Pol[...]

Options and Accessories Options and Accessories[...]

[...]

1780R-Series Operator ’ s Manual 6–1 Options and Accessories Options The Power Cord options are the only currently available options for purchase with the 1780R-Series. Part numbers are listed below . Accessories Standard Accessories The following accessories are shipped with the 1780R-Series. Qty T ek Part Number Description 1 070–6890–XX [...]

Options and Accessories 6–2 1780R-Series Operator ’ s Manual One of the following cables is shipped with each instrument: Qty T ek Part Number Description 1 161–0216–00 Cable, Power 1 161–0066–09 Cable, Power (Option A1, 220 V Euro) 1 161–0066–10 Cable, Power (Option A2, 240 V , UK) 1 161–0066–11 Cable, Power (Option A3, 240 V ,[...]

Index Index[...]

[...]

1780R-Series Operator ’ s Manual Index–1 Index A Absolute units (mV / IRE), 3–54 Accessories, 6–1 Adjustments Calibrator amplitude (zero set), 3–45 External horizontal gain (waveform), 3–46 Gain (vector), 3–46, 3–49 Horizontal gain (waveform), 3–45 Horizontal position control cal- ibration, 3–43 Readout intensity (vector), 3–4[...]

Index Index–2 1780R-Series Operator ’ s Manual Coupling (AC / DC / GND), 3–53 CR T controls, 2–1, 2–3 Cursors T ime, 2–5, 3–1 Set interval, 3–45 V oltage, 2–6, 3–2 Units (mV / IRE), 3–54 Zero set, 3–45 CW connector , 2–16 CW reference, 2–12, 3–55 D DC level measurements, 3–24 DC restorer (slow / fast / off), 3–53 D[...]

Index 1780R-Series Operator ’ s Manual Index–3 NTSC, 3–6 P AL, 3–7 W aveform NTSC, 3–12 P AL, 3–12 XY graticule scale, 3–9 H Hold for function switches, 2–1 Horizontal gain adjustment (waveform), 3–45 Horizontal position control, 2–5 Horizontal position control calibra- tion, 3–43 How to... Adjust calibrator amplitude (zero se[...]

Index Index–4 1780R-Series Operator ’ s Manual Low–pass filter , 2–14 Luminance filter , 2–14 M Magnifier, 2–12 Measurement menu Bowtie, 4–33 Chrominance–to–luminance inequalities, 4–23 Diff phase and dif f gain, 4–12 Differential gain, 4–7 Differential phase, 4–2 F SC time marks, 4–36 General measurement informa- tion, [...]

Index 1780R-Series Operator ’ s Manual Index–5 R Readout (ON / OFF), 3–55 Readout intensity adjustment (vectorscope), 3–46 Readout intensity adjustment (waveform), 3–43 Rear panel connectors, 2–16 Recall a preset, 3–36 Recall initial settings, 3–37 Recover function, 3–37 Reference switch (INT / EXT / CW), 2–12 Remote connector, [...]

Index Index–6 1780R-Series Operator ’ s Manual X X–Y input, 2–16 XY / PIX switch, 2–1 1 XY graticule scale, 3–9 Z Zero carrier (ICPM), 4–18 Zero set Calibrator amplitude, 3–45 Phase shift (reference set), 2–7 V oltage cursors, 3–45 Index Index–6 1780R-Series Operator ’ s Manual X X–Y input, 2–16 XY / PIX switch, 2–1 1 [...]