HP (Hewlett-Packard) HP 83236B PCS Interface manuale d’uso

1 HP 83 236B PCS Interface C DMA /PCS Ba se S tation Tes t Sof twar e , User ’s Guide Software Ve rsion A.02.01 HP Part No. 83236- 90121 Printed in U. S. A. March 1997 Revision A[...]

2 Copyrigh t © Hewlett -Pac kard Compa ny 1996 RESTRICT ED RIGHTS LE GEN D Use, duplicati on or disclo sure by the U. S. Government is subje ct to restric tions a s set for th in s ubparagrap h (c) (1) (ii) of the Rights in Tech nical Data and Computer Softwa re Clause in DFARS 25 2.227-701 3. Hewl et t-Pa ckard Co m p any 3000 Ha nover S treet Pa[...]

3 In th is Book This b ook d ocuments the us e of th e CDMA/PCS Base Sta tion Te st Software su p- plied w i th the PCS In terf ace. It focus es spe ci fica lly on the use of the PCS Inter - face in tes ting CDMA/PCS base station eq uipment. Chapte r 1, G etting Starte d This chapt er prov ide s th e step s for lo adi ng and run n ing the CDMA/PCS [...]

4 Con v en ti on s Used in this Book The followin g terms are used thro ughout thi s book: • Test Set - the HP 8921A Cell Sit e Test Set . • Cellu lar Ada pter - t he HP 8 3203B or 832 05A CDMA Ce ll ular Ad apter. • PCS In terfac e - the HP 83236 A,B; us ed to tra nslate PCS signa ls int o t he ra nge of t he Te s t Se t. • Softwar e - the[...]

Contents 5 1 Gett in g S tarte d Introduc tion 12 Who s hould us e the CDMA/ PCS BS Test Sof twa re? 12 Prod uct De scri ption 12 So ftw ar e Oper at ion in B rie f 12 Requi re d Equi pmen t 13 Step 1 : Make Connection s 14 Step 2 : Lo ad and R un the CDMA/PCS B S Test Softwar e 15 Nav i ga ti on of the C DM A /P CS BS T est S o ftwa r e 17 Step 3:[...]

Contents 6 2 M aki ng M eas ur eme nts Overvie w 25 Tran smit t er Mea sur emen ts 25 Re cei ve r Meas ure ment s 25 Other 25 Averag e P ower 2 6 Overvie w 26 Requi re ments 26 Step s 27 Notes 27 Modulatio n Qualit y (R ho) 28 Overvie w 28 Requi re ments 28 Step s 29 Notes 29 Code Dom ain Powe r 30 Overvie w 30 Requi re ments 30 Step s 31 Notes 31 [...]

Contents 7 Ov er vi ew 36 Requi re ments 36 Step s: Go to Spe ctrum A nalyz er @ P resen t Chan 37 Step s: Go to Spe ctrum Anal yzer & Ent er Fr eq 38 Notes 39 Receive r Sens itivity 40 Ov er vi ew 40 Requi re ments 40 Step s 41 Notes 41 Receive r Performanc e in Additive Noise 42 Ov er vi ew 42 Requi re ments 42 Step s 43 Notes 43 Search fo r [...]

Contents 8 3 Operatin g Ove rview Overvie w 50 Co nfi gu rat i on In for mat io n 50 Re feren ce I nfo rmat i on 50 Selecti ng a PCS B and 51 Step s 51 Notes 51 Compensati ng for TX a nd RX Measur ement Path Loss 53 Requi re ments 53 Step s 53 Notes 53 Saving Configu ration I nformatio n to Memory 54 Requi re ments 54 Step s 54 Notes 54 Loadin g Co[...]

Contents 9 Setting the Test S ystem “ Beep” 59 Step s 59 Notes 59 An Alte rna tive T est-System-t o-Base-Sta tion Tim ebase Configur ation 60 Step s 60 Notes 60[...]

Contents 10 4 Troublesh ooting Overvie w 64 Error s When Loa d ing and Running the Softwar e 65 Me mo ry O ver fl ow Err ors 6 5 Test S ystem Conf ig urati on Erro rs at Runti me 66 Other Tes t Syste m Configur at io n Err or s 67 Co nfi gu rat i on In for mat io n is Not Upda ted as Sav ed 67 Me nu S cre e ns i n th is Bo ok do not Ma tc h th e S [...]

11 1 Getting Start ed Follow the ste ps in this chapter to loa d and r un t he CDMA/PCS BS Test Software , to connect the test eq uipment, and to make initi al setti ngs to confi gur e your Test Syst em. Getti ng Sta rted[...]

12 Chap ter 1, Getting Started Intr oduction Intr oductio n Who should use t h e CDMA/PCS BS Test Software? If you ar e inst alling, commiss ioning, or m aintaining Personal Co mm unicati on Servi ces (PCS) site s us ing the Code Division Multiple Access (CDMA) stand ard, this Softwa re will assi st you i n p erform ing tests of transmitter an d re[...]

13 Ch apt er 1, G et ti ng Sta r ted Intr oduction Requi red Equip ment Fig ure 1 You mu st s upp ly : Means to c ontro l base st ation and read FE R. CDMA PCS Base Sta tion. Cable s to conn ect the base sta tion to the Test Sys tem . (See t abl e be low .) HP 8 3236A, B Cable Ki t (Supp lied with t he HP 8 3236A,B) Supplied with the Test System : [...]

14 Chap ter 1, Getting Started Step 1: Make Connecti ons St ep 1: Make Connecti ons Make t he conne ctions between the elements o f the Test System and t he base stat ion as shown in figur e 2. NOTE: This fig ure do es not il lust rate al l re ar-pane l co nnecti ons between the Cellula r Adapte r and Te s t S et . R ef e r to th e Ce ll ular Ad ap[...]

15 Ch apt er 1, G et ti ng Sta r ted Step 2: Load and Run the CDMA/PCS BS Te st Soft ware St ep 2: Load a nd Run the CDMA /PCS B S Tes t Softwa re The next st ep is to get the CDMA / PCS BS Test Softwa re loa ded into t he Test Set and runni ng on t he IBASIC con troller . Locate the m emory card su pplied wit h the PCS In t erfa ce an d fo llow th[...]

16 Chap ter 1, Getting Started Step 2: Load and Run the CDMA/ PCS BS Test Software Fig ure 4 Position the cursor at Ch oices : and select PCSCDMA. Position the cursor at Run T est an d select it. The Soft ware is now loading. Position the cursor a t Select P rocedure Filename: and select it. Position the cursor a t Card and s ele ct it. Press TEST [...]

17 Ch apt er 1, G et ti ng Sta r ted Step 2: Load and Run the CDMA/PCS BS Te st Soft ware Navigation of the CDMA/PCS BS Test Softwa re After the S oftwa re has loaded , you should se e the CDMA/PCS BS Test Softw a re’s ma in me nu s cree n on the di splay of the Test S et (se e figur e 5 ). Import ant features of this sc reen are indicate d in th[...]

18 Chap ter 1, Getting Started Step 3: Confi gure the Softwar e Step 3: Co nfigure t he Software The firs t t ime you run the Softwa re you must enter info rmat ion about your setup and the ba se s tation being tested. Use t hese ste ps: Scrol l to and select Base St ation Power Out and enter the level of your tr ansmitt ed signal . Scrol l t o a n[...]

19 Ch apt er 1, G et ti ng Sta r ted Step 3: Conf igure t he Soft ware Scrol l to and se lec t TX Measurement Path Loss . Enter the loss ( th rough cabl es, coup lers, and atte nuators ) between yo ur base stat ion’ s tr ansmitt er t est p ort a nd the RF IN/OUT p ort of the PCS Inte rface. 5 Configuration Informatio n Menu Enter the valu e int o[...]

20 Chap ter 1, Getting Started Step 3: Confi gure the Softwar e This compl etes the req ui r ed entr ies. You may no w save you r ent ries or pres s the Ma in Menu (k5) ke y to retu rn to the mai n menu . To save entr ies see, “Savi ng Config urati on In formati on to Memory” in Chapter 3. k1 k2 k3 k4 k5 USER 9 User keys 1- 5 corres pond to th [...]

21 Ch apt er 1, G et ti ng Sta r ted Step 4 : Perf orm CDMA Tests Step 4: P erform CD MA Tests Now that you have successf ully run the Softwa re and entered your confi guration values, yo u can go on to making CDMA measur ements. Refer to c hapter 2, "Mak ing Measu rements" to s ee detaile d steps for p erform ing CDMA measure ments. If Y[...]

22 Chap ter 1, Getting Started Step 4: Perf orm CDMA Tests[...]

23 2 Maki ng M easu remen ts This c hapter contains desc riptio ns of the m ost c ommon receive r and tra nsmitter tests p erfo r med on CD MA b as e sta tion equipment. For eac h tes t, requir ement s are liste d and the st eps t o perfo rm the measuremen t are provid ed. Making M easur ement s[...]

24 Chapter 2, Making M easurements[...]

25 Ch ap ter 2, M ak in g M e asur eme nts Over vi ew Ov erv i ew This c hapte r pres ents measur ement t asks m ost commonly per formed when testi ng CDMA/PCS base sta tion equipment. The mea surements are s ep arate d by type: transm itter t ests, follo wed by the r eceiver tes ts. For descr iptions o f general Softw a re use , refe r t o c hapte[...]

26 Chapter 2, Making M easurements Av er age Pow er Average Power Overview Ave rage power is a time-ave raged broad band measur ement of the trans mit ted signa l str ength at the RF I N/OUT por t on th e f ront pane l of the PCS Inte r face . The averag e power m ea sur ement is “uncorr elated”; it doe s not req uire th e refer ence signals ( [...]

27 Ch ap ter 2, M ak in g M e asur eme nts Ave r a ge Po we r St ep s 1 Connect the equip ment as shown in fig ure 6. 2 In the mai n me nu, enter the Base Station Channel numbe r f or the t ransmit ter being te sted . 3 Set up th e base stati on to tr ansm it on the cha nne l number entered in step 2. 4 From the main m enu, cho ose Perform Average [...]

28 Chapter 2, Making M easurements Modulation Q uality (Rho) Modu la tion Qu al ity (Rho ) Overview I n this measureme nt, the modulat ed sign al is comp ared t o an idea l , refe rence waveform to determi ne the performanc e of the trans mitter’ s modulation c ircuitr y. Rho va lues are i n th e ran ge of 0 to 1 . A v alue o f 1 indicat es perfe[...]

29 Ch ap ter 2, M ak in g M e asur eme nts Modulation Qualit y (Rho) St ep s 1 Connect the equip ment as shown in fig ure 8. 2 In the mai n me nu, enter the Base Station Channel numbe r f or the t ransmit ter being te sted . 3 Also in the ma in me nu, enter the Base Station PN Offset . 4 Set up the b ase statio n t o tr a nsmi t ( pil ot only ) on [...]

30 Chapter 2, Making M easurements Code Domain Power Code Domain Power Overview The Code Domain Power m ea surement shows the re lative power in eac h of the Walsh chann els of a transm itted sign al. Signal strength of the Pi lot, Paging, Sync, and Tr affi c chan n e ls are d i splayed ( in dB). Figur e 10 CAUTION: Before performi ng any transmit [...]

31 Ch ap ter 2, M ak in g M e asur eme nts Code Domain Power St ep s 1 Connect the equip ment as shown in fig ure 10. 2 In the mai n me nu, enter the Base Station Channel numbe r f or the t ransmit ter being te sted . 3 Also in the ma in me nu, enter the Base Station PN Offset . 4 Scrol l to an d sele ct Go to Code Domain Analyzer Screen . 5 Verify[...]

32 Chapter 2, Making M easurements Code Domain Timing Code Domain Timi ng Overview S imilar to the Code Domain Power test, this measur emen t shows the ti ming rela tionship bet ween the various Walsh channe ls a nd the Pilot channel . Figur e 12 CAUTION: Before performi ng any transmit ter meas ure ments, make sure that th e power level ap pli ed [...]

33 Ch ap ter 2, M ak in g M e asur eme nts Code Domain Ti ming St ep s 1 Connect the equip ment as shown in fig ure 12. 2 In the mai n me nu, enter the Base Station Channel numbe r f or the t ransmit ter being te sted . 3 Also in the ma in me nu, enter the Base Station PN Offset . 4 Scrol l to an d sele ct Go to Code Domain Analyzer Screen . 5 Sc r[...]

34 Chapter 2, Making M easurements Code Domain Phase Code Domain Phase Overview S imilar to the Code Domain Power measur e ment, this measure ment shows the rela tive phase relati onship of the various Wal sh channels re feren ced to the pilot channe l (Walsh 0). Figur e 14 CAUTION: Before performi ng any transmit ter meas ure ments, make sure that[...]

35 Ch ap ter 2, M ak in g M e asur eme nts Code Doma in Phase St ep s 1 Connect the equip ment as shown in fig ure 14. 2 In the mai n me nu, enter the Base Station Channel numbe r f or the t ransmit ter being te sted . 3 Also in the ma in me nu, enter the Base Station PN Offset . 4 Scrol l to an d sele ct Go to Code Domain Analyzer Screen . 5 Sc ro[...]

36 Chapter 2, Making M easurements Transmit S pectrum Tra nsmit Spec trum Overview I t is often useful to l ook at the transmitt er sig nal with the spectru m analyzer to se e its overa ll symmetr y and occupi ed bandwidt h, and to identif y potentia l sources of inte rference . This section de tai ls two methods f or accessi ng t he spectrum analy[...]

37 Ch ap ter 2, M ak in g M e asur eme nts Transmit S pectrum St e p s : G o to Spectrum Anal yzer @ Pr e sent Ch an 1 Connect t he equipment as s hown in figure 16. 2 In the mai n me nu, enter the Base Station Channel numbe r f or the t ransmit ter being te sted . 3 Turn on your b ase stati on tra nsmitt er. 4 Scrol l to an d sele ct Go to Spectru[...]

38 Chapter 2, Making M easurements Transmit S pectrum St e p s : G o to Spectrum Anal yzer & Enter Freq 1 Connect t he equipment as s hown in figure 16. 2 Turn on your b ase stati on tra nsmitt er. 3 In the ma in me nu, scrol l to a nd se le ct Go to Spectrum Analyzer & Enter Freq . 4 The PCS Int erf ac e ana lyzer att enuati on sett ing wi[...]

39 Ch ap ter 2, M ak in g M e asur eme nts Transmit S pectrum Notes For eit her sp ectr um anal yzer mo de ( Go To Spectrum Analyzer @ Present Chan or Go To Spectrum Analyzer & Enter Freq ) , do not make changes to RF port selecti ons, tun e freque nc y, or other “setup” fie lds. You may change spectr um-analyz er-speci fic setti ngs such a[...]

40 Chapter 2, Making M easurements Receiver Sensiti vity Re ce iv er S en s i t iv i ty Overview I n this te st, the CDMA gene rator sends a cal ibrate d signa l to t he ba se st ation’s receive r. For a given RF level, the resulti ng Frame Error Rate (FER) is measured. Standa rds specify an FER of 1.0% or less at an RF level of − 119 dBm. Figu[...]

41 Ch ap ter 2, M ak in g M e asur eme nts Receiver Sensit ivity St ep s 1 Connect the equip ment as shown in fig ure 19. 2 In the mai n me nu, enter the Base Station Channel number. 3 Scrol l to an d sele ct Setup CDMA Generator . 4 Scroll to RF Level and e nter t he sig nal ge nerat or lev el fo r your s ensit ivity measurem ent (in dBm). 5 Scrol[...]

42 Chapter 2, Making M easurements Receiver Performance in Additive Noise Recei ver Perf orman ce in Additi ve Nois e Overview I n this test, the CDM A signal gen era tor is used wi th the Additive White Gaussian Noise (AWGN) s ource to si mulate a n uplink signa l to the base st ations’ s receive r. Various le vels of signal -to-noise (E b /N o [...]

43 Ch ap ter 2, M ak in g M e asur eme nts Receiver Perform ance in Additiv e Noise St ep s 1 Make t he e quipment co nnections as s how n in f igur e 21. 2 On th e main m e nu sc re en , en t er th e Base Station Channel numbe r. 3 Scrol l to an d sele ct Setup CDMA Generator . 4 Set th e Generator Mode to Eb/No . Note tha t a n ew f ield appe ars[...]

44 Chapter 2, Making M easurements Sear ch fo r PN O ffs et Sea rch fo r PN Offs et Overview I f you are uns ure of the PN offset f or the tr ansmitte r and channe l you pla n to test , the S o ftware pr ovides this utili ty to search for and displ ay the PN offset. Figur e 23 CAUTION: Before performi ng any transmit ter meas ure ments, make sure t[...]

45 Ch ap ter 2, M ak in g M e asur eme nts Sear ch fo r PN Of fs et St ep s 1 Connect the equip ment as s hown in fi gure 23 . 2 In the mai n me nu, enter the Base Station Channel numbe r f or the t ransmit ter being te sted . 3 Turn on your base sta tion tra nsmitt er (pilot c hannel mus t be on). 4 Scrol l to an d sele ct Search for PN Offset and[...]

46 Chapter 2, Making M easurements Check Even- Second Clock Che ck Ev en-S econd Clo ck Overview Mo st CDMA transmit ter tes ts requir e an Eve n-Second c lock sign al from the base stat ion in order to corr elate th e measur ement. I f you are r eceiving an e rror st at ing Cannot correlate to input signal. Check setup. , y ou may have a probl em [...]

47 Ch ap ter 2, M ak in g M e asur eme nts Check Even-Second Clock St ep s 1 You ca n st art wi th th e con nec ti ons sho wn i n fi g ur e 24 . You will get prompts from the Software to chang e the E ven-S econd cl ock c onnect ion whe n needed. 2 In the mai n menu, sc roll t o and sel ect Check Even Second Clock . 3 You wi ll h ave t o ma ke a ch[...]

48 Chapter 2, Making M easurements Check Even- Second Clock[...]

49 3 Opera ting Ove rvi e w This c hapter descr ibes gene ral ope ration of the Software. Opera ti ng Overview[...]

50 Ch apt er 3, Op era t ing Ov er vi ew Over vie w Ov erv i ew This chapte r provides deta il on Softwa re operat ions not covered in chapte r 1, "Gett ing Started" or c hapter 2, " Making Meas urements". Conf iguration Information • "Select ing a PCS Ba nd" on p age 5 1 • "Compen sating for TX and RX Mea sur[...]

51 Ch apt er 3, Op erat ing Over view Selecting a PCS Ba nd Select in g a PCS Band With the HP 83236B PCS Inte rfac e, th e Softwar e supports sever al “c hann e l plans ” use d in P CS sy stems inte rnationa ll y. By select ing the appr opria te pl an, yo u can use cha nnel n umbers ( rather than f req uencies) t o tu ne the signa l gene rator[...]

52 Ch apte r 3, Oper ati ng Ov ervi ew Sele ct ing a P CS B an d Table 1 Channe l plans for P CS Band se lections. PCS Band Channel Plan To calculate the transmitter frequency: Nor th Amer ic a n Band Chann el ra nge: 0 t o 1199 Tran smitte r frequ encies : 1930 to 1989. 95 MHz Offset: − 80 M H z Ch ann el spacin g: 50 kHz TX freq = (channel × 0[...]

53 Ch apte r 3, Op erat ing Ove rv iew Compensating for TX and RX Measurement Path Los s Compen sating fo r TX a nd RX Mea sure m ent Path Los s The Softwar e can compensate for losse s (through cable s, attenua tor s, coup lers, and s o for th) betwe en the Test Syste m and the base sta tio n for the best accur acy in average power a nd r eceiver [...]

54 Ch apte r 3, Oper ati ng Ov ervi ew Saving Config uration Informat ion to Memory Savin g Con f ig urat io n Inf or m at io n to M e mor y The infor m ation about your s etup and base stati on ent ered into the Configuration Information Menu can be saved to memory. This s a ves time when running the Sof tware at a later da te and hel ps to preve [...]

55 Ch apte r 3, Op erat ing Ove rv iew Loading Confi guration Informat ion from Memory Load in g Con figu r at ion In f or m at ion f ro m Me mor y The infor m ation about your s etup and base stati on ent ered into the Configuration Information Menu can be saved in memory. This d a ta is loaded aut omatically whe n y ou re -run the Software. You c[...]

56 Ch apte r 3, Oper ati ng Ov ervi ew Purging Conf iguratio n Information from Memory Purg in g Con f igu r ation In f or m at ion f ro m Mem or y The infor m ation about your s etup and base stati on ent ered into the Configuration Information Menu can be saved in memory. This d a ta is loaded aut omatically whe n y ou re -run the Software. In so[...]

57 Ch apte r 3, Op erat ing Ove rv iew Using Aut ost art Using Autostart “Autost a rt” is a featur e of the Test Set’s IBASIC contr olle r and is used to custo m ize the inst rument for a specif ic task. The autostar t feature allows you to “flip a swit ch” to configu re t he Test Set to automatica lly run whateve r program is current ly [...]

58 Ch apte r 3, Oper ati ng Ov ervi ew Viewing Instrument Connection s Viewi ng Ins trument Co nnecti ons In se tting up your Test System, you may have quest ions a bout connecti ons betwee n the Test Set, Cel lular Ada pter, and PCS I nterf ace as we ll a s the connec tions to the CDM A/PCS base stati on. In the Configuration Information Menu is a[...]

59 Ch apte r 3, Op erat ing Ove rv iew Setting the Te st System “Be ep” Setti ng the T es t Sys tem “B eep” The Softwar e can provide an audio tone (bee p) to let you know w h en selections are made in the menu scree ns. This beep sounds when you change menu scree ns, choose an entry f ield, and when y ou complete an entr y. In its default [...]

60 Ch apte r 3, Oper ati ng Ov ervi ew An Alt ernative Test- System-to-Base- Station Timeba se Configurat ion An Alterna ti v e Test -Sy st em-to -Ba s e-S tation Timeba s e Config ura ti on Chapter 1 describe s the most common meth od of connecti ng timeba ses b etween the Test Sy stem and the base -station -under- test. This sect ion shows an alt[...]

61 Ch apte r 3, Op erat ing Ove rv iew An Alternativ e Test-System-to- Base-Station Tim ebase Configur ation Figur e 25 114. 3 MHz IF IN I BAS EBAND OU T AUX CW RF IN IQ RF OUT OPT ION AL SER IAL PO RT CONTROL I/O SYNTH REF IN10 MHz OUT CDMA CLOCK O UTPUTS DSP IN MOD OUT 10 MHz REF O UT Q BA SEBAND O UT PWR REF UNLOCK DIAGNOSTIC MONITOR 1. 22 8 8 M[...]

62 Ch apte r 3, Oper ati ng Ov ervi ew An Alt ernative Test- System-to-Base- Station Timeba se Configurat ion[...]

63 4 Trou blesho oting Use thi s cha pter if you have encounte red Softwa re er rors or i f you ar e quest ioning measure ment results. Troubl eshooting[...]

64 Ch apte r 4, Tr oubl esho oti ng Over vie w Ov erv i ew Use table 2 to locat e your problem or a received err or messag e, then refer to the page nu mber shown. Proble m or error message Refer to: Loading and r unning the so ftware Memory ove rflow e rrors "Memory Ove rfl ow Er rors" on p a ge 6 5 Me ssa ge: HP-IB Com mand not accepted[...]

65 Ch ap ter 4, T rou ble sho oting Errors When Loading a nd Running the Soft ware Erro rs When Loadin g and Ru nning th e Software Memory Over flow Errors Pr ob lem : The random access memory ( RAM ) spa ce of the Test Set is shared by IBASIC progra m s and t he Save/Rec all st orage re gisters. I f yo u have saved a l arge number of re gister s i[...]

66 Ch apte r 4, Tr oubl esho oti ng Errors Whe n Loa ding and Running the Software Test Sy st em Conf iguration E rr ors at Run ti m e Pro blem: When i t is fi r st run, the Software check s to se e t hat all required elements of a CDMA/PCS Test System are present. If i t does not find a CDMA Cellula r Adapter or a P CS Inte r f ace, it will r epor[...]

67 Ch ap ter 4, T rou ble sho oting Errors When Loading a nd Running the Soft ware Other Tes t Syst em Conf iguration Errors Pro blem : Additiona l er ror s can be reported when using the Softwa re, depending on which measure ment modes are being used: Compensation not pe rformed. Che ck DUPLEX O UT cable. Re try? This err or can be report ed if th[...]

68 Ch apte r 4, Tr oubl esho oti ng Errors Whe n Loa ding and Running the Software Menu S creens i n thi s Bo ok do n o t Match the Screens that You See Pro blem: You may have loaded anoth er software proce dur e from the utilit y s oft ware memory car d that is s hipped with each PCS Inte rfac e. Proce dures for Te st System Connect ivity (SYS_CON[...]

69 Ch ap ter 4, T rou ble sho oting Errors While Attempting Measurements Erro rs Whi le Attempt i ng Measu rements CDMA Measurement not Correlatin g Pro blem : If you r Te st Syst em is no t set up correctly for some of t he tests, you m ay see the foll owing message pos ted at the top of the displa y: Cannot correlate to input signal. Check setup.[...]

70 Ch apte r 4, Tr oubl esho oti ng Errors Whil e Attempting Measurements 4 Test System timebase re fere nc e not conne ct ed. Verify tha t you have acces s to the base st at ion’s referenc e timebase signal (typica lly 19.6608 MH z). The r efe rence s houl d be connec te d to the S YNTH REF IN por t on the re ar o f th e C el lul ar A da pte r. [...]

71 Ch ap ter 4, T rou ble sho oting Errors While Attempting Measurements Frame Error Rate (Receiver Measure ments) Pro blem : If your Test Syst em i s not set up corre c tly for receive r tests, you may see erron eous re sults ( extreme ly high F ER or the inabi lity to return a meas urement) on the tool you use for d isplaying t he Frame E r ror R[...]

72 Ch apte r 4, Tr oubl esho oti ng Errors Whil e Attempting Measurements 5 RX PN Offset not se t to ze r o. For r ec e iv er tes ting, th e CDMA Ge ner ator is simul ating th e r ev erse chann el (uplin k) signa l as it would be sent b y a mobile phon e. Mobiles tra nsmit on sys te m time, so the PN Offset should be set to ze ro. Make sure that t [...]

73 Ch ap ter 4, T rou ble sho oting Questionabl e Measurement Result s Ques tion able Measureme nt Results Overview R e fer to the topic s in this section if you are see ing measur ement re sults wit h no indic a ted er rors, but you a r e fa iling a test or you beli e ve you’ r e getting e rroneous results . Th e foll owing pages l ist some comm[...]

74 Ch apte r 4, Tr oubl esho oti ng Questionabl e Measurement Results Rho Meas urements Sources of er rors in rho measurement inc lud e the foll owing: Input si gnal is outside the m easurement r ange of the PCS I nterface The specifie d range for rho measure ments with the PCS Inter fac e is − 13 to + 30 dBm (50 µ W to 1 W) when tes ting ba se [...]

75 Ch ap ter 4, T rou ble sho oting Questionabl e Measurement Result s Sensitivity tests: r andom data not se lected for si gnal so urce For receive r sensitivi ty m eas urement s, c heck to see tha t the CDMA Gener ato r is set to send r andom data . In the CDMA Gener ator Menu Selection screen , the Generator Mode should be set to Data a nd the D[...]

76 Ch apte r 4, Tr oubl esho oti ng Questionabl e Measurement Results[...]

77 Gloss ary Acces s Channel A reverse CDMA chan nel used by mobile stat ions for com mun icati ng to the base stati on. The acc ess channe l is u se d for sh ort sign ali ng me ssa ge e xch ang es suc h as ca l l or iginat ions, r esponses to p a ges, a nd reg is tra ti ons . T h e acc ess ch a nne l is a s lot te d random ac ce ss channel. Added [...]

Gloss ary 78 Code Dom ain Analyz er An ins t rum ent that meas ure s indivi dual Walsh Cha nnel ch ar acte risti cs in a CDMA cha n n e l. The Cell ular Adapter c an di splay all 64 Walsh Ch ann els in a rece ived si gna l and displa y thei r powe r, phase , an d timing rela ti onship. Code Dom ain Phase A me asu r em en t mode that provi de s the [...]

79 Gloss ary Fram e A bas i c tim in g in te rv a l in th e syste m. For the Access ch a nnel, pa gi ng ch an nel , an d t raff ic ch an nel , a f r ame is 20 ms long . For the sync cha nne l, a fra me i s 26.66 6. .. ms long. Fram e Clo cks A phas e-lock ed loop in the CDMA Cellu lar Adapt er tha t provide s the follo wing CDMA cl o cks for int e [...]

Gloss ary 80 Per s onal Communi cat ion Servic es (PCS) Emergin g wirel ess networks u s ing digit al modul ation format s an d opera ting i n the fre que nc y ba nd bet ween 1.8 and 2.4 GHz. Pilot Ch annel An unmodulated , dire ct - sequen c e, spread-s pe c trum sig nal tr an s mit ted cont inuous ly by each CDMA bas e sta tio n. The Pilo t chann[...]

81 Gloss ary Rho The measure of the waveform quality of a modula ted s i gnal in a CDMA sys te m. A r ece iv ed sig na l is co mp a red t o an ide al , refe rence, s ignal. A hig h correla tion bet w ee n th e re ce iv ed sig n a l an d th e refe renc e re prese nt s a high wave form qu ality fact or. Sync Channel A code channe l in the forward CDM[...]

Gloss ary 82 Walsh Function One of 2 N time - or thogonal bina ry func tions (no te t hat t he funct ions a re or thogonal aft er mapping 0 to 1, and 1 to − 1). Walsh Symbol Th e time n ece ssar y t o tr an s mit one W alsh fun ction on the re vers e CDMA ch annel. Zero Offset Pilot PN S equence A pil ot PN seque nce al igne d with System Time su[...]

83 A acce ss c hannel defi niti on, 77 Ad ded Whi te Ga uss ian Nois e defi niti on, 77 adde d whit e ga ussia n noi se, 42 Autosta rt, 57 defi niti on, 77 tur ning off , 57 tur ning on, 57 aver age p ower , 26 defi niti on, 77 susp ect meas urement r es ults , 73 AWGN, 42 defi niti on, 77 B bad mea sureme nts, 73 base st atio n defi n iti on , 77 [...]

Index 84 fron t panel , 58 inst rument s, 14 rear panel, 58 ti meba se s, 60 corr elat i on, 69 corr elat i on errors, 69 D data bl ock defi n iti on , 78 descr iption pr odu c t, 12 E Eb defi nition, 78 Eb/No, 42 defi nition, 78 eq uipment requi red, 13 erro rs, 63 Config urati on I nforma tion, 67 fram e erro r rate (FER ) , 71 HP-IB, 66 meas ur [...]

Index 85 F FER defi niti on, 78 fin ite in pul se respons e fil te r defi niti on, 78 FIR fi lt er defi niti on, 78 forw ar d CD MA ch ann el defi niti on, 78 forw a r d lin k defi niti on, 78 for ward t raff ic channel defi niti on, 78 fr ame defi niti on, 79 fra me clocks defi niti on, 79 fra me delay pu lse defi niti on, 79 fra me delay t im e r[...]

Index 86 I ins trument con necti ons, 14 , 58 inte rme dia te fre que ncy defi niti on, 79 L Load ing Co nfigu rati on In format ion, 55 loa di ng the sof tw are , 15 M main menu scr een, 17 maki ng c onnect ions, 14 maki ng mea sureme nts, 23 Mcps defi nition, 79 mea suremen t erro rs , 69 mea surem en t resul ts av er age p ow er , 73 cod e dom a[...]

Index 87 N n avi gation of soft ware menu s, 17 noi se s our ce , 42 Nois e, Added W hite Gau ssian defi niti on, 77 O offse t quadr ature phas e shif t keyin g defi n iti on , 79 OQPSK defi n iti on , 79 P pagin g channe l defin ition, 79 PCS defin ition, 79 PCS Band se lec tion , 51 PCS freq uencies, 51 PCS Inte r f ace defin ition, 79 error m es[...]

Index 88 Q QPSK defi niti on, 80 q uadrat ure phase shif t keyi ng defi niti on, 80 qua d ratu re spr ead in g defi niti on, 80 q ues tiona bl e m eas urement results , 73 R rece iver perform ance in a dditi ve nois e, 42 re ce ive r s ens itiv it y, 40 rec ei ver te sts su s pect meas uremen t result s, 74 refer ence si gn al defi n iti on , 80 re[...]

Index 89 T Test Set defi niti on, 81 ti meba se co nnect io ns, 60 timi ng, code dom ai n, 32 tone , audio, 59 tr af fi c ch a nn e l defi niti on, 81 tran s m it sp e ct ru m , 36 trig ger e ven t defi niti on, 81 tro ubleshoot ing, 63 TX Meas uremen t Pat h Loss, 53 U UCT defi n iti on , 81 Univ er sal Coordi nated Tim e defi n iti on , 81 uplin [...]

Index 90 W Walsh chip defi niti on, 81 Wal sh c over defi niti on, 81 Wal sh f uncti on defi niti on, 82 Wal sh s ymbol defi niti on, 82 Z zero offs et pi lot defi n iti on , 82[...]