Sennheiser FT-902 manual

INSTRUCTION FOR USE EM 203[...]

CONTENTS 1 TECHNICAL OVERVIEW 1.1 Computer Control 1.2 Diversity 1.3 HIDYN plus ® noise reduction system 1.4 Block diagrams 2 POSSIBLE TRANSMITTER/RECEIVER COMBINATIONS 2.1 EM 203 receiver/SK 2012 TV(HiDyn plus ® ) and SKM 4031 HiDyn plus ® 2.2 EM 203 receiver/SK 50/250 UHF and SKM 5000 (HiDyn plus ® ) 2.3 EM 203 receiver/SER 20 transceivers 3 [...]

Introduction The wireless Mikroport multi-channel sound transmission system EM 1046 is a transmitter/receiver system in a modular design. It offers comfortable handling and can be relied on for dependable service. • 3-channel diversity receiver EM 203 with microprocessor-controlled receiver modules • Ultimate flexibility in the selection of tra[...]

T echnical overview 1 Computer control 1.1 Diversity 1.2 HiDyn plus ® noise reduction 1.3 Block diagrams 1.4[...]

Every single EM 1046 RX receiver module has an in-built micro- processor for the RF section, the operating elements and all indicators. It serves to control the following components or parameters: • phase locked loop (PLL) synthesizer • function of keys • 8 digit LED display • two LED bargraph displays • true diversity • monitoring • [...]

Diversity 1.2 Every EM 1046 RX receiver module operates on true diversity. An antenna splitter, integrated into the chassis, serves to route the antenna signals from both antennas to the three receiver modules. The receiving antenna not only receives direct electromagnetic waves, but also reflections from walls, windows, ceilings and other installa[...]

HiDyn plus ® 1.3 »HIDYN plus ® « NOISE REDUCTION SYSTEM The »HIDYN plus ® « noise reduction system serves to reduce the effects of RF interference fields. It increases the signal-to-noise ratio and gets close to about 110 dB for peak modulation. »HIDYN plus ® « is a wideband compander system. It is a combination of a compressor at the tra[...]

Block diagram EM 203 1.4[...]

Possible transmitter/ 2 receiver combinations EM 203 receiver/ 2.1 SK 2012 TV (HiDyn plus ® ) and SKM 4031 TV-HiDyn plus ® T ransmitters EM 203 receiver/ 2.2 SK 50/250 UHF and SKM 5000 (HiDyn plus ® ) T ransmitters EM 203 RECEIVER/ 2.3 SER 20 TRANSCEIVER[...]

2.1 EM 203 receiver/ SK 2012 TV (HiDyn plus ® ) and SKM 4031 TV -HiDyn plus ® AB 1036 TV 2 GZA 1036 TV 450 - 800 MHz or 2 GZA 1036-9 140 -960 MHz SKM 4031 TV-HiDyn plus ® SK 2012 TV (HiDyn plus ® ) MKE 10-2 R MKE 102-2 R MKE 2-2 R EM 203 receiver NOTA BENE NOTA BENE SK 2012 body-pack transmitters can be retrofitted (change from HIDYN ® to HIDY[...]

EM 1046/ SK 50 UHF / SK 250 UHF and SKM 5000 2.2 2 GZA 1036 TV 450 - 800 MHz or 2 GZA 1036-9 140 -960 MHz SK 50 UHF / SK 250 UHF AB 1036 TV MKE 10-4 MKE 2-4 MKE 102-4 SKM 5000 EM 203 receiver[...]

EM 203 receiver/ 2.3 SER 20 transceiver SER 20 transceiver with HiDyn plus © 2 GZA 1036 TV 450 - 800 MHz or 2 GZA 1036-9 140 -960 MHz Retrofitted SER 20 transceivers (change from HIDYN © to HIDYN plus © ) can be used in conjunction with EM 203 receivers. Refer retrofitting to Sennheiser distributors or Sennheiser's Service Department, 30900[...]

MANIPULA TION FUNCTION DISPLA Y (RX) 13 EM 203, Publ. 10/94 engl Putting the EM 203 receiver 3 to work M ains connection 3.1 A ntenna connection 3.2 A F connection 3.3 S tart-up procedure/ operating indicators 3.4[...]

Power is supplied by a plug-in power supply unit. The power module is available as a 110, 230 or 240 V AC model. The unit can easily be adapted to changing power requirements by replacing the power module. Connection of the plug-in power supply unit is via socket P at the back panel of the EM 203. Mains connection 3.1 The two antennas needed for di[...]

MANIPULA TION FUNCTION DISPLA Y (RX) 15 EM 203, Publ. 10/94 engl This is how the channel module indicates that it is ready for operation (after power-up). The three LED indicators for the operating voltages light up (see ch. 4.2.1 ). The display changes after about 5 seconds It shows the frequency on which the mdoule is operating or the name of the[...]

A vailable modules 4 EM 1046 RX 4.1 receiver module Monitor 4.2[...]

EM 1046 RX receiver module 4.1 Adjustment 4.1.1 Receiver frequencies 4.1.2 Squelch 4.1.3 Selection 4.1.4 RF Signal level/deviation/ battery condition Display 4.1.5 T ext/frequency/battery condition Entry of brief texts 4.1.6 System configurations and specifications 4.1.7 Remote monitoring 4.1.8 Of transmitter battery Monitoring of audio signals 4.1[...]

OPERA TING ELEMENTS ON THE EM 1046 RX MODULE RACK CONNECTOR (invisible) 8 DIGIT ALPHANUMERIC LED DISPLAY KEYS TO CONTROL THE MENU AND TO PROGRAM THE MODULE INDICATOR FOR REMOTE MONITORING MONITOR KEY STAND-BY APPROVAL NUMBER DIVERSITY CHANNELS LED BARGRAPH DISPLAYS FOR DEVIATION/RF SIGNAL LEVEL/ BATTERY CONDITION[...]

MANIPULA TION FUNCTION DISPLA Y (RX) 19 EM 203, Publ. 10/94 engl Adjustment 4.1.1 Y N SET ESC MENU AB DIVERSITY Depress an arbitrary menu key on the EM 1046 RX receiver module: Y N SET ESC The receiver switches to the menu mode. It is now ready for data entry. Receiver operation remains unaffected. The receiver is not set to the new parameters unle[...]

MANIPULA TION FUNCTION DISPLA Y (RX) 20 EM 203, Publ. 10/94 engl Receiver frequencies 4.1.2 Y N SET ESC MENU AB DIVERSITY SET 24 MHz maximal 24 MHz maximal 24 MHz maximal Chose option "RX-Freq." ( chapter 4.1.1 ). Depress to allow the receiver frequencies to be selected. The "M" on the display starts blinking. The EM 1046 RX rec[...]

MANIPULA TION FUNCTION DISPLA Y (RX) 21 EM 203, Publ. 10/94 engl Use keys to select a receiver frequency as per pre-programmed parameters. • Keeping the key depressed acdelerates selection. Depress to store new frequency. Y N • Freely selectable receiver frequencies can easily be adjusted in a 5 kHz grid. The unit changes automatically from one[...]

MANIPULA TION FUNCTION DISPLA Y (RX) 22 EM 203, Publ. 10/94 engl Depress to store data or depress or to stop storage. Y Y = YES ! The new frequency is stored in the memory. The EM 1046 RX receiver module switches to the new frequency selected. For a short time the display indicates The program returns to the selection mode. Additional frequencies c[...]

MANIPULA TION FUNCTION DISPLA Y (RX) 23 EM 203, Publ. 10/94 engl Squelch 4.1.3 Choose option „Squelch“ (see ch. 4.1.1 ) Depress to allow the squelch threshold to be set. Use keys to select the squelch threshold. • Keeping the key depressed accelerates adjustment. Depress and subsequently: to store the squelch threshold or depress or: to stop [...]

MANIPULA TION FUNCTION DISPLA Y (RX) 24 EM 203, Publ. 10/94 engl Selection 4.1.4 RF signal level/deviation/batery condition SET Y N It is useful to have permanent settings to facilitate day-to-day applications. The LED bargraph displays on the EM 1046 RX receiver module can be set to four different modes: DEVIATION/FIELD STRENGTH OF THE ACTIVE CHAN[...]

MANIPULA TION FUNCTION DISPLA Y (RX) 25 EM 203, Publ. 10/94 engl Use or to select the parameters to be indicated. Depress and subsequently to store the latest setting or depress to stop storage. DEVIATION/FIIELD STRENGTH to be indicated: The left-hand bargraph display indicates DEV (= Deviation) in % The right-hand bargraph display shows the field [...]

MANIPULA TION FUNCTION DISPLA Y (RX) 26 EM 203, Publ. 10/94 engl Use or to select the parameters to be indicated. Depress and subsequently to store the latest setting or depress to stop storage. Y = YES ! Y SET N = NO ! N CONTINUED FROM PAGE 25, CH. 4.1.4 SET ESC MENU AB DIVERSITY Y N RFA RFB µ V 1000 100 RF µ V 1000 100 RF FIELD STRENGTH OF CHAN[...]

MANIPULA TION FUNCTION DISPLA Y (RX) 27 EM 203, Publ. 10/94 engl Y N SET N = NO ! N CONTINUED FROM PAGE 26, CH. 4.1.4 SET ESC MENU AB DIVERSITY Y N DEV A DEV B DEVIATION CHANNELS A/B (DIVERSITY) to be indicated: The left-hand bargraph display indicates DEV (= deviation) in % for diversity channel A. The right-hand bargraph display shows the DEV (= [...]

MANIPULA TION FUNCTION DISPLA Y (RX) 28 EM 203, Publ. 10/94 engl Use or to select the parameters to be indicated. Depress and subsequently to store the latest setting or depress to stop storage. Y N Y = YES ! Y SET N = NO ! N CONTINUED FROM PAGE 27, CH. 4.1.4 SET ESC MENU AB DIVERSITY Y N µ V 1000 100 RF 150 100 DEV % After having depressed and NO[...]

MANIPULA TION FUNCTION DISPLA Y (RX) 29 EM 203, Publ. 10/94 engl Y N SET ESC MENU AB DIVERSITY Choose option "DispConf" (see ch. 4.1.1 ). Depress to allow the display to be set. Use to select the parameters to be indicated. Depress and subsequently to store the latest setting or depress key to stop storage. Display 4.1.5 T ext/frequency/b[...]

MANIPULA TION FUNCTION DISPLA Y (RX) 30 EM 203, Publ. 10/94 engl Entry of brief texts 4.1.6 SET Y N Y N SET ESC MENU AB DIVERSITY The display indicates the latest text entered. Thefirst segment of the eight alphanumeric segments starts blinking. NOT A BENE • If you don't want to use all segments: When "scrolling" the character set,[...]

MANIPULA TION FUNCTION DISPLA Y (RX) 31 EM 203, Publ. 10/94 engl System configurations 4.1.7 and identification data Y N SET ESC MENU AB DIVERSITY The receiver specifications are stored in every single module: The display indicates the MODEL/SERIES • EM 1046-U-L UHF ( 450 - 790 MHz) • EM 1046-U-H UHF ( 630 - 960 MHz) SERIAL NUMBER OF THE MODULE[...]

MANIPULA TION FUNCTION DISPLA Y (RX) 32 EM 203, Publ. 10/94 engl Remote monitoring of 4.1.7 transmitter battery Y N SET ESC MENU AB DIVERSITY Choose the option to indicate the condition of the transmitter battery (see ch. 4.1.1 ). Depress to select the display mode for the indication of the battery condition. NOT A BENE This function is only operat[...]

MANIPULA TION FUNCTION DISPLA Y (RX) 33 EM 203, Publ. 10/94 engl CONTINTUED FROM PAGE 32, CH. 4.1.8 CAPACITY OF RECHARGEABLE BATTERIES: Capacity of 100 % Capacity of about 80 % Capacity of about 60 % Capacity of about 40 % Capacity of about 20 %, the display starts blinking. Attention ! Replace the battery pack. The remaining capacity only suffices[...]

MANIPULA TION FUNCTION DISPLA Y (RX) 34 EM 203, Publ. 10/94 engl Monitoring of audio signals 4.1.8 It is only possible to monitor the active channel, i. e. one channel at a time. The LED on the monitor key lights up if the key is depressed, i. e. monitoring is possible. Depress to monitor the audio signal via headphones connected to the mainframe. [...]

MANIPULA TION FUNCTION DISPLA Y (RX) 35 EM 203, Publ. 10/94 engl Stand-by 4.1.9 Y N Y N SET ESC MENU AB DIVERSITY Y N In some situations it is useful not only to mute the audio signal at the mixing console but also to switch off the complete RF section of the EM 1046 receiver module. Two reasons of several possible are: • the wish to have only ac[...]

Monitor 4.2 LED indicators 4.2.1 Monitor headphones 4.2.2 OPERA TING ELEMENTS MONITORING VOLUME 20 dB GAIN FOR MONITORING ON/OFF SWITCH POWER INDICATORS BOOSTER INDICATORS (INCL. OVERLOAD) REMOTE SWITCH (REMOTE CONTROL) WITHOUT FUNCTION! MONITOR HEADPHONES (STEREO, 6,3 mm Ø MIN. IMPED. 50 Ω )[...]

MANIPULA TION FUNCTION DISPLA Y (RX) 37 EM 203, Publ. 10/94 engl LED indicators 4.2.1 REMOTE + 20 dB + 20 dBu + 12 V - 12 V + 5 V DC - A DC - B OL - A OL- B POWER LED DISPLA Y The three upper LEDs light up if the in-built power supply unit operates perfectly + 12 V supply voltage = 12 V - 12 V supply voltage = -12 V + 5 V supply voltage = 5 V If on[...]

MANIPULA TION FUNCTION DISPLA Y (RX) 38 EM 203, Publ. 10/94 engl Monitor headphones 4.2.2 REMOTE + 20 dB + 20 dBu + 12 V - 12 V + 5 V DC - A DC - B OL - A OL- B POWER The monitor socket is suited to connect mono or stereo headphones with an impedance of about 50 to 300 Ω . The rotary switch serves to adjust the volume. The " + 20 dB " s[...]

T echnical data 5 Frequency range 450 - 790 MHz with RX module item no. 03246 760 - 960 MHz with RX module item no. 03247 Bandwidth 24 MHz Channel spacing, min. 300 kHz Channel grid, min. 5 kHz 1st oscillator frequency (1st LO) 71 MHz below / above Fe 1st intermediate frequency (1st IF) 71 MHz 2nd oscillator frequency (2nd LO) 81.7 MHz 2nd intermed[...]

SENNHEISER ELECTRONIC KG 30900 Wedemark Subject to alterations. Errors and omissions excepted! Publ.: 10/94 51104[...]