Page 1 comMQRPc@c”’’š“‹…ƒ™‹”“˜ s‡—›‹…‡@m”“‹™”— o•‡—ƒ™‹”“@mƒ“šƒ‘ QPPRMPVPQMRpP advancing wireless test...
Page 2 OPERATION MANUAL COMMUNICATIONS SERVICE MONITOR COM-120C PU B L IS H ED B Y CO P YR IGHT  IF R 2 0 0 2 A l l r i g ht s r e s er v e d. N o p ar t of t h i s p ub l i c at i on ma y be r e pr o d u ce d , s tor e d i n a r etr i e va l s y s te m, or tr an s m it t ed in an y f or m or b y a n y m e an s , el e ctr o n i c, m e c ha n i c a l, p h ot o co p y i ng , r e c o r d in g or ot h er w i s e wi t ho ut t h e pr ior per m i s s io n o f th e p u bl i s h er .
Page 3 CABLE STATEMENT Double shielded and pr oper ly ter minated exter nal inter face cables must be used with this equipment when inter facing with the RS- 232 and IEEE- 488. For continued EMC compliance, all exter nal cables must be 3 meter s or less in length. NOMENCLATURE STATEMENT The CO M- 120C Communications Ser vice Monitor is the official nomenclatur e for the EMC and Safety compliant CO M- 120C Communications Ser vice Monitor .
Page 4 SAFETY FIRST: TO ALL OPERATIONS PERSO NNEL R E F E R A L L S E R V I C I N G O F U N I T T O Q U A L I F I E D T E C H N I C A L P E R S O N N E L . T H I S U N I T C O N T A I N S N O O P E R A T O R S E R V I C E A B L E P A R T S .
Page 5 C A U T I O N : S I G N A L G E N E R A T O R S C A N B E A S O U R C E O F E L E C T R O M A G N E T I C I N T E R F E R E N C E ( E M I ) T O C O M M U N I C A T I O N R E C E I V E R S .
Page 6 LIST OF EFFECTIVE PAGES The manual pages list ed below t hat are af f ect ed by a current change or revision, are so ident if ied by a revision number. Dat e of Issue f or original and changed pages are: O r iginal ......
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Page 8 PREFACE SCOPE This manual contains instr uctions for oper ating the CO M- 120C Communications Ser vice Monitor . The instr uction level is r elatively basic and pr esupposes no pr evious exper ience on the par t of the oper ator with a communication ser vice monitor of this type.
Page 9: Table Of Contents
TABLE OF CONTENTS SECTION 1 - INTRODUCTION Par agr aph Title Page 1- 1 G ener al ..................1- 1 1- 2 RF G ener ate O per ation ..............1- 2 1- 3 RF Receive O per ation ..............1- 3 1- 4 Duplex O per ation ................
Page 10 SECTION 3 – COMPOSITE (CONT) Par agr aph Title Page 3- 3- 1 Soft Function Keys ................3- 9 3- 3- 2 Cur sor Movement ................3- 9 3- 3- 3 Editing Fields Using Data Scr oll Keys and Spinner ......3- 9 3- 3- 4 Editing Numer ic Data Fields .............
Page 11 SECTION 4 - OPERATION (CONT) Par agr aph Title Page 4- 2 RF Receive O per ation ..............4- 31 4- 2- 1 G ener al RF Receive O per ation ............4- 31 4- 2- 2 SINAD Meter O per ation ..............4- 38 4- 2- 3 Distor tion Meter O per ation ...............
Page 12 SECTION 4 - OPERATION (CONT) Par agr aph Title Page 4- 7 Meter s O per ation ................4- 69 4- 7- 1 Digital Voltmeter O per ation .............. 4- 69 SECTION 5 - COMMON PRACTICES Par agr aph Title Page 5- 1 RF G ener ate ...................
Page 13 SECTION 6 - OPTIONS Par agr aph Title Page 6- 1 Inter nal Batter y ( O ption 01) .............. 6- 1 6- 2 O ven Cr ystal O scillator Fr equency Standar d ( O ption 02) ..... 6- 1 6- 3 30 kHz IF Filter ( O ption 03) ..............
Page 14 SECTION 6 - OPTIONS (CONT) Par agr aph Title Page 6- 12- 1 G ener al ..................6- 21 Accessing The Clear channel LTR  Tr unking Test System ....6- 22 6- 12- 2 6- 12- 3 LTR Tr unking Repeater Simulation ............ 6- 23 6- 12- 4 Tr ansmit Tr unking Data Block ............
Page 15 SECTION 6 - OPTIONS (CONT) Par agr aph Title Page 6- 13- 8 Cell Init Test ................... 6- 60 6- 13- 9 Automatic Test Pr intout ..............6- 61 6- 13- 10 AMPS Cell Site Simulator Manual Tests ..........6- 62 6- 13- 11 Registr ation Test ................
Page 16 SECTION 6 - OPTIONS (CONT) Par agr aph Title Page 6- 15- 6 Repeater Simulator ................6- 104 6- 15- 7 Testing Radio Units ................. 6- 105 6- 15- 8 MPT 1327/ MPT 1343 Number ing Schemes ........6- 106 6- 15- 9 Radio Simulator ................
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Page 18: Section 1 - Introduction
SECTION 1 INTRODUCTION GENERAL The CO M- 120C is a micr opr ocessor contr olled, digitally synthesized communication ser vice monitor , which combines the oper ations of many differ ent test instr uments into a single, compact unit. The CO M- 120C is capable of per for ming these functions: R F G e n e r a t o r R F R e c e i v e r F u l l D u p l e x O p e r a t i o n...
Page 19: Rf Generate Operation
SECTION 1 INTRODUCTION RF GENERATE OPERATION Generating The CO M- 120C is capable of gener ating CW or modulated signals fr om 250 kHz to 1000 MHz. The output level is var iable fr om - 130 to - 13 dBm. Modulation types include AM, FM and PM ( Phase Modulation) or apply an exter nal modulation sour ce.
Page 20: Rf Receive Operation
SECTION 1 INTRODUCTION RF RECEIVE OPERATION Receiving The CO M- 120C r eceives CW and modulated signals r anging fr om 250 kHz to 1000 MHz. In addition to single fr equency oper ation, the CO M- 120C demodulates and detects AM, FM and PM modulated signals and executes defined fr equency sweep oper ations by scanning a r ange of pr edeter mined Fr equency List settings.
Page 21: Duplex Operation
SECTION 1 INTRODUCTION DUPLEX OPERATION The CO M- 120C Duplex O per ation featur e r anges fr om 250 kHz to 1000 MHz. The RF G ener ator and RF Receiver both wor k in Duplex O per ation Mode with the added capacity of using offset fr equencies up to ±...
Page 22: Audio Function Generators
SECTION 1 INTRODUCTION AUDIO FUNCTION GENERATORS Audio/Tone Coding The CO M- 120C has two Audio G ener ator s. O ne gener ator has a r ange of 10 Hz thr ough 20 kHz and the second gener ator has a fixed 1 kHz tone. The wavefor ms ar e sine, squar e, tr iangle and r amp.
Page 23: Oscilloscope
SECTION 1 INTRODUCTION OSCILLOSCOPE The CO M- 120C has a 50 kHz single tr ace O scilloscope. The O scilloscope can oper ate as a dependent or independent function in each of the O per ation Modes. Both functions give the choice of oper ation modes, live, stor e, r ecall, compar e and aver age. Tr igger type choices ar e Nor malized, Auto and O ne Shot.
Page 24: Spectrum Analyzer
SECTION 1 INTRODUCTION SPECTRUM ANALYZER The Spectr um Analyzer monitor s inter nal and exter nal signals r anging fr om 250 kHz to 1000 MHz. The Scan width r ange is editable fr om 1 kHz to 100 MHz per /div. Sweep r ate and Resolution Band Width ( RBW) ar e editable with a menu or manual edit.
Page 25 SECTION 1 INTRODUCTION Generate Operation The G ener ate O per ation Spectr um Analyzer is a r elative measur ing device only and available units ar e limited to dB. Scan widths r ange fr om 1 kHz to 100 MHz per /div and zer o scan.
Page 26: Meters
SECTION 1 INTRODUCTION METERS Dependent The CO M- 120C pr ovides meter ing capability in all thr ee O per ation Modes. The meter s ar e in Receive O per ation, G ener ate O per ation or both. The meter s ar e available for Simplex and Duplex O per ation.
Page 27: Options
SECTION 1 INTRODUCTION OPTIONS O p t i o n 0 1 – I n t e r n a l B a t t e r y P r o vi d e s se l f - co n t a i n e d d c p o w e r w h e n e xt e r n a l a c o r d c p o w e r i s u n a va i l a b l e .
Page 28: Com-120C Product Specifications
SECTION 1 INTRODUCTION 1-10 COM-120C PRODUCT SPECIFICATIONS A war m- up time of 5 minutes is r equir ed for the following per for mance r equir ements. RF measur ements ar e r efer enced to 50 Ω .
Page 29 SECTION 1 INTRODUCTION MODULATION F r e q u e n c y M o d u l a t i o n R F F r e q u e n c y R a n g e : 2 5 0 H z t o 1 G H z D e vi a t i o n R a n g e : 1 0 0 H z t o 1 0 0 k H z...
Page 30 SECTION 1 INTRODUCTION P h a s e M o d u l a t i o n R F F r e q u e n c y R a n g e : 2 5 0 kH z t o 1 G H z M o d u l a t i o n R a n g e : 0 .
Page 31 SECTION 1 INTRODUCTION A . F . G E N E R A T O R # 2 F r e q u e n c y R a n g e : 1 k H z ( si n e w a v e ) F r e q u e n c y A c c u r a c y : ±...
Page 32 SECTION 1 INTRODUCTION RECEIVER F r e q u e n c y R a n g e : 2 5 0 kH z t o 1 G H z R e s o l u t i o n : 1 0 0 H z T u n a b l e R a n g e : T u n a b l e f r o m 1 0 0 H z t o 1 .
Page 33 SECTION 1 INTRODUCTION SELECTIVE RF CO UNTER F r e q u e n c y R a n g e : 2 5 0 k H z t o 1 G H z ( T h e r e c e i v e d f r e q u e n c y m u st b e w i t h i n t h e I F b a n d p a s s o f t h e C O M - 1 2 0 C .
Page 34 SECTION 1 INTRODUCTION FREQ UENCY MODULATION METER R a n g e : 2 , 5 , 1 0 , 2 0 , 5 0 , 1 0 0 k H z f u l l s c a l e R e s o l u t i o n : 1 0 H z ( 2 , 5 a n d 1 0 k H z r a n g e ) 1 0 0 H z ( 2 0 , 5 0 a n d 1 0 0 k H z r a n g e s )
Page 35 SECTION 1 INTRODUCTION AM MODULATION METER R a n g e : 1 % t o 1 0 0 % R e s o l u t i o n : 0 . 1 % ± 5 % o f f u l l s c a l e , ± 1 c o u n t + s o u r c e A c c u r a c y : r e si d u a l A M ( 3 0 0 kH z I F B W , 1 kH z t o n e , 5 0 % A M d e p t h , C - M e s s a g e w e i g h t e d...
Page 36 SECTION 1 INTRODUCTION RECEIVE LEVEL METER R a n g e : - 1 0 1 t o - 3 0 d B m ( 1 5 kH z I F B W ) - 8 0 t o - 3 0 d B m ( 3 0 0 kH z I F B W ) A c c u r a c y : ±...
Page 37 SECTION 1 INTRODUCTION DIGITAL VO LTMETER R a n g e s : 5 0 m V t o 2 0 0 V i n a 1 - 2 - 5 s e q u e n ce R a n g e : D C : 1 0 m V t o 2 0 0 V d c ( S C O P E / D V M i n p u t ) A C :...
Page 38 SECTION 1 INTRODUCTION SPECTRUM ANALYZER C e n t e r F r e q u e n c y : 2 5 0 kH z t o 1 G H z T u n a b l e R a n g e : 0 H z t o 1 G H z ( c h a r a ct e r i s t i c s b e l o w 2 5 0 k H z a r e n o t s p e ci f i e d ) R e s o l u t i o n :...
Page 39 SECTION 1 INTRODUCTION L e ve l D i s p l a y : L o g , 2 a n d 1 0 d B / d i v V e r t i ca l R e so l u t i o n : 1 d B R a n g e ( D yn a m i c) : 6 0 d B...
Page 40 SECTION 1 INTRODUCTION FUSE REQ UIREMENTS A C F u s e s : 1 0 0 t o 1 2 0 V A C : 3 . 0 A , 2 5 0 V , T yp e F ( 5 x 2 0 m m ) 2 2 0 t o 2 4 0 V A C : 3 .
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Page 42: Section 2 - Installation
SECTION 2 INSTALLATION GENERAL This section contains infor mation on pr epar ing the CO M- 120C for use. Also listed ar e installation and oper ating pr ecautions for safe use of the Unit. PRECAUTIONS Befor e oper ating this instr ument, the oper ator should be thor oughly familiar with all aspects of this manual.
Page 43 SECTION 2 INSTALLATION DC INPUT DC FUSE COVER AC FUSE COVER BATTERY ACCESS PANEL CONNECTOR 00607300 AC INPUT CONNECTOR MAIN POWER SWITCH CO M- 120C Rear Panel POWER ON INDICATOR POWER APPLIED INDICATOR POWER ON KEY 00607028 CO M- 120C Front Panel...
Page 44: Power Up Procedures
SECTION 2 INSTALLATION POWER UP PROCEDURES The Inter nal Batter y, if installed, char ges automatically when the CO M- 120C is connected to a power sour ce and the Main Power Switch is set to O N. Power Supply designed sense applied...
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Page 46: Section 3 - Composite
SECTION 3 COMPOSITE 00607167 COM-120C Front Panel Controls FRONT PANEL CONTROLS 1. Power O N Key Selection toggles between Power APPLIED and Power O N states. 2. Display Pr ovides video infor mation of cur r ent test oper ation.
Page 47 SECTION 3 COMPOSITE 5. DATA ENTRY Keys t h r u U se t o e n t e r n u m e r i c ( 0 - 9 ) va l u e s. U se t o e n t e r d e ci m a l p o i n t i n n u m e r i c va l u e s.
Page 48 SECTION 3 COMPOSITE FRONT PANEL KEY SHIFT CHARACTER G E N R E C + / - D P L X S P C L • S C O P E A N L Y Z M T R S A U D I O G E N S T O R E R C L...
Page 49 SECTION 3 COMPOSITE 7. ANTENNA Connector Input connector to monitor "off- the- air " signals. Also used as a connection for low power ( 0.25 W maximum) signals. CAUTION: DO NOT EXCEED 0.25 W MAXIMUM CONTINUOUS INPUT OR DAMAGE TO THE CO M- 120C MAY RESULT.
Page 50 SECTION 3 COMPOSITE 14. AUDIO /DATA G EN Connector 600 Ω connector for output of audio and data gener ator s. Access is selectable fr om individual gener ator setup scr eens. CAUTION: DO NOT EXCEED 20 V MAXIMUM CONTINUOUS INPUT OR DAMAGE TO THE CO M- 120C MAY RESULT.
Page 51 SECTION 3 COMPOSITE 19. AUDIO /DATA IN Connector 100 k Ω connector allows input of exter nal audio and data signals. CAUTION: DO NOT EXCEED 20 V MAXIMUM CONTINUOUS INPUT OR DAMAGE TO THE CO M- 120C MAY RESULT. 20. SCO PE/DVM Connector 1 M Ω...
Page 52: Rear Panel Controls
SECTION 3 COMPOSITE 00607261 CO M- 120C Rear Panel Contr ols REAR PANEL CONTROLS 26. DC Input Connector Accepts dc power cor d to supply dc power ( 12, 24 to 30 Vdc) to CO M- 120C. CAUTION: DO NO T EXCEED 30 Vdc O R DAMAG E TO THE CO M- 120C MAY RESULT. 27.
Page 53 SECTION 3 COMPOSITE 29. AC Fuse Two 3.0 A, 250 V, Type F, 5 x 20 mm fuses ar e pr ovided for ac oper ation. CAUTION: O NLY USE 3 A FUSE O R DAMAG E TO THE CO M- 120C MAY RESULT. 30.
Page 54: Screens, Soft Function Keys And Menus
SECTION 3 COMPOSITE SCREENS, SOFT FUNCTION KEYS AND MENUS The following comments apply to all O per ation Scr eens within the CO M- 120C. Reading and under standing these notes is the r esponsibility of the oper ator . Due to the level of detail r equir ed to fully descr ibe all facets of the CO M- 120C, only sur face infor mation is pr ovided to help educate the oper ator .
Page 55 SECTION 3 COMPOSITE CO M- 120C Composite Hier ar chy 3-10...
Page 56: Editing Numeric Data Fields
SECTION 3 COMPOSITE 3-3-4 EDITING NUMERIC DATA FIELDS The pr imar y method of editing data in numer ic data fields such as fr equencies and levels is to use DATA ENTRY Keys. The step- by- step pr ocedur e for this method is as follows: Position cur sor on field selected for data entr y using DATA SCRO LL Keys or TAB Function.
Page 57: Rf Generate Screen
SECTION 3 COMPOSITE 3-3-7 RF GENERATE SCREEN The RF G ener ate O per ation Scr een defines and activates the CO M- 120C RF G ener ator and is accessed by pr essing the G EN Test Mode Key. The RF G ener ate O per ation Scr een displays in the configur ation last used.
Page 58 SECTION 3 COMPOSITE 7. Modulation Sour ce Window Displays active Modulation Sour ces. Inactive Modulation Sour ces ar e not shown. If two ( or mor e) sections of the RF Modulator ar e set in conflict ( e.g. G EN1 set for PM and G EN2 set for FM, or G EN1 set for 0.01 kHz deviation and G EN2 set for 2.60 kHz deviation) the scr een displays the invalid sour ce gr ayed out.
Page 59: Rf Receive Screen
SECTION 3 COMPOSITE 3-3-8 RF RECEIVE SCREEN The RF Receive O per ation Scr een is used to define and activate the CO M- 120C RF Receiver and is accessed by pr essing the REC Test Mode Key. The RF Receive O per ation Scr een displays in the configur ation last used. 1.
Page 60 SECTION 3 COMPOSITE 7. IF Bandwidth Displays selected IF Bandwidth. Selections include 15 and 300 kHz. 8. AF G en O ut Field Pr essing ENTER, when cur sor is on this field, accesses setup menu for AF G ener ator sour ces. Menu displays each sour ce individually. Sour ces available include G EN1 ( Audio G ener ator 1) , G EN2 ( Audio G ener ator 2) , DTMF ( DTMF Tone G ener ator ) and DATA ( DATA G ener ator ) .
Page 61 SECTION 3 COMPOSITE 14. Power /Received Level Meter Power Meter displays power level of signal r eceived thr ough T/R Connector only in dB and Watts. RECEIVED LEVEL Meter displays r efer enced Power Level of signal r eceived thr ough ANTENNA Connector only in dBm and µV. 15.
Page 62: Duplex Screen
SECTION 3 COMPOSITE 3-3-9 DUPLEX SCREEN The Duplex O per ation Scr een is used to define and activate the CO M- 120C RF G ener ator and RF Receiver simultaneously at the same fr equency or offset fr equencies and is accessed by pr essing the DPLX Test Mode Key.
Page 63 SECTION 3 COMPOSITE 8. Modulation Sour ce Block Displays selected Modulation Sour ce. Selections include G EN1 ( Audio G ener ator 1) , G EN2 ( Audio G ener ator 2) , DTMF ( DTMF Tone G ener ator ) , DATA ( DATA G ener ator ) , EXT ( Exter nal Modulation) and MIC ( Micr ophone Modulation) .
Page 64 SECTION 3 COMPOSITE 19. FL ( Fr equency List) Setting Displays selected Fr equency List number ( FL- 00 thr ough FL- 99) when active and O FF when inactive. Duplex Receive RF Field ( 20) echoes fr equency of selected Fr equency List setting.
Page 65: Oscilloscope Screen
SECTION 3 COMPOSITE 3-3-10 OSCILLOSCOPE SCREEN The Independent O scilloscope O per ation Scr een oper ates as an independent piece of test equipment and is accessed by pr essing the SCO PE Instr uments Key. Input for O scilloscope O per ation is thr ough the SCO PE/DVM Connector . The O scilloscope O per ation Scr een The O scilloscope O per ation Scr een displays in the configur ation last used.
Page 66 SECTION 3 COMPOSITE 6. Mode ( cont) In Ref- Live, the value of cur r ent r eading is subtr acted fr om the stor ed value and the r esult is displayed. Both Live- Ref and Ref- Live r equir e a pr eviously stor ed tr ace. Aver age displays aver age of last four tr aces.
Page 67: Spectrum Analyzer Screen
SECTION 3 COMPOSITE 3-3-11 SPECTRUM ANALYZER SCREEN The Independent Spectr um Analyzer O per ation Scr een oper ates independent of the Test Modes and is accessed by pr essing the ANLYZ Instr uments Key. The Spectr um Analyzer O per ation Scr een displays in the configur ation last used. 1.
Page 68 SECTION 3 COMPOSITE 10. Scale Displays Logar ithmic Scale for Ver tical Scale ( 10) . Selections ar e 2 and 10 dB. 11. Refer ence Adjusts Spectr um Analyzer Ver tical Scale ( 16) ±10 dB when Scale ( 10) is set to 10 dB.
Page 69: Audio/Data/Signaling Generators Screen
SECTION 3 COMPOSITE 3-3-12 AUDIO/DATA/SIGNALING GENERATORS SCREEN The Audio/Data/Signaling G ener ator s O per ation Scr een oper ates as an independent piece of test equipment. Pr ess the AUDIO G EN Instr uments Key to access the Audio/Data/Signaling G ener ator s O per ation Scr een.
Page 70: Meter Screens
Sour ce. The units ar e dependent on the Sour ce. 4. Distor tion Meter The Distor tion Meter deter mines Distor tion for a 1 kHz tone passed to the COM-120C thr ough the specified Sour ce. 3-25...
Page 71: Memory Lists And Storage Of Parameters
SECTION 3 COMPOSITE 3-3-14 MEMORY LISTS AND STORAGE OF PARAMETERS The CO M- 120C offer s two ways to use memor y to stor e par ameter s. Make a Fr equency List specifying a fr equency for G ener ating, a fr equency for Receiving and an O ffset for Duplex.
Page 72: Utility Function Screens
SECTION 3 COMPOSITE 3-3-15 UTILITY FUNCTION SCREENS The Setup Scr een allows access to system configur ation and pr ovides infor mation on system status and is accessed by pr essing SETUP Memor y Key. Place cur sor on desir ed utility number and pr ess ENTER Key. Each Setup Scr een selection accesses another scr een for per for ming the desir ed function.
Page 73 SECTION 3 COMPOSITE 8. Keyboar d The Keyboar d Setup Scr een accesses specific oper ation par ameter s. 9. DSP Selftest The DSP Selftest scr een is for per for ming selftests and r eading r esults. Use the Soft Function Keys to activate the desir ed test.
Page 74: Section 4 - Operation
SECTION 4 OPERATION RF GENERATE OPERATION Th i s s e ct i o n pr o vi d e s in f or ma t io n o n c o nf i gu r i n g th e CO M- 12 0 C t o pe r f or m te s t s o n th e r e ce i v er .
Page 75 SECTION 4 OPERATION S e t R e f e r e n c e a n d S w e e p F u n c t i o n w o r k i n d e p e n d e n t l y , n e ve r si m u l t a n e o u s l y .
Page 76 SECTION 4 OPERATION S et O u t pu t L e ve l U n it s a s f o l lo w s: S e l e c t s d B m a s O u t p u t L e v e l U n i t s . S e l e c t s µ...
Page 77 SECTION 4 OPERATION S e l e c t O u t p u t a s f o l l o w s: S e l e c t s T / R C o n n e ct o r a s o u t p u t c o n n e c t o r . RF: 10.0000 MHz S e l e c t s A U X R F C o n n e c t o r a s o u t p u t c o n n e c t o r .
Page 78 SECTION 4 OPERATION If A u d io G en er at or 1 or 2 O p er a t io n i s d e s ir ed , press F1 or F2 to select GEN1 or GEN2 for Modulation Source and cursor to OFF. S e l e c t t h e d e s i r e d M o d u l a t i o n T yp e : M o d u l a t i o n O F F .
Page 79 SECTION 4 OPERATION If TO N E i s s e le c t ed a s F or ma t, enter Audio Tone Frequency. If TO N E i s s e le c t ed a s F or ma t, enter Shape. Ra n ge i s 5 to 20 0 00 Hz w i th Sh a pe s et t o S IN E .
Page 80 SECTION 4 OPERATION If DT MF G en er at or O pe r at i on i s d e sir e d, pr e ss F 3 to s el e c t DT M F f or Mo d ulat i o n S our c e and cursor to OFF.
Page 81 SECTION 4 OPERATION If D AT A G e n er at or O pe r at i on i s de s ir e d, pr e ss F 4 to se l e ct DT M F f or Mo d u la t io n S our c e a n d c ur so r to O FF.
Page 82 SECTION 4 OPERATION If M i cr o ph o ne M o du l ati o n O p er a t io n i s de s ir ed , press F5 to set MIC for Modulation Source and cursor to OFF. S e l e c t t h e d e s i r e d M o d u l a t i o n T yp e : M o d u l a t i o n O F F .
Page 83 SECTION 4 OPERATION If External Modulation Operation i s de s ir e d, press F6 to select EXT Modulation Source and cursor to OFF. S e l e c t t h e d e si r e d M o d u l a t i o n T y p e : M o d u l a t i o n O F F .
Page 84 SECTION 4 OPERATION If A u d io /D at a F i lt er s ar e r e qu ir e d for o p er at i on o f M et er s or Sp e a ke r , co nf i g ur e an d a ct i v at e r e qu ir e d f il t er s .
Page 85 SECTION 4 OPERATION S e l e c t S p e a k e r / H e a d p h o n e s F i l t e r F i e l d se t t i n g a s f o l l o w s: P r e ss O F F S o f t F u n ct i o n K e y F 1 t o s e t F i l t e r t o O F F .
Page 86: Sinad Meter Operation
SECTION 4 OPERATION 4-1-2 SINAD METER OPERATION Th e S IN AD Me t er for th e R F G e n er a t e O p er at i o n S c r e e n me a s ur e s SIN A D fo r a n a u di o s i gn a l p a s se d t hr o u gh t h e A UD IO / D AT A IN Co n n e c tor .
Page 87 SECTION 4 OPERATION S e l e c t R a n g e a s f o l l o w s: 15 dB S e l e c t s 1 5 d B R a n g e . Range: AUTO 55 dB...
Page 88 SECTION 4 OPERATION I f A l a r m F u n c t i o n i s d e si r e d , co n f i g u r e a s f o l l o w s : OFF/ON T o g g l e s A l a r m F u n ct i o n O N o r O F F .
Page 89: Distortion Meter Operation
SECTION 4 OPERATION 4-1-3 DISTORTION METER OPERATION Th e Di s t or t i on Me te r for t h e R F G e n er a t e O pe r a t io n S cr e en me a s ur e s D i s t or t i on f or a n au d i o s i gn a l p a s se d t hr o u gh t h e A UD IO / D ATA IN C o n n e c t o r .
Page 90 SECTION 4 OPERATION I f P e a k H o l d F u n ct i o n i s d e s i r e d , t a ke m e t e r o u t o f A u t o r a n g e a n d co n f i g u r e a s f o l l o w s : OFF/ON Peak Hold:...
Page 91: Audio Frequency Level Meter Operation
SECTION 4 OPERATION 4-1-4 AUDIO FREQUENCY LEVEL METER OPERATION Th e A ud i o Fr e q ue n c y L e v el Me te r for t h e R F G e n er a t e me a s ur e s the l e v el of a n a ud i o s i gn a l p a s se d t hr o u gh t h e A UD IO / D AT A IN Co n n e c tor .
Page 92 SECTION 4 OPERATION I f U p p e r L i m i t F u n ct i o n i s d e si r e d , co n f i g u r e a s f o l l o w s: OFF/ON Upper Limit: 1.50V...
Page 93: Oscilloscope Operation Screen
SECTION 4 OPERATION 4-1-5 OSCILLOSCOPE OPERATION SCREEN T h e G e n er a to r O s ci l l o s c o pe u s ab l e a bbr e v i at ed fu l l sc r e e n O s c i l lo s c o pe .
Page 94 SECTION 4 OPERATION S el e c t O s c i l lo s c o pe Sc a l e . R ef er t o th i s se l ec t i o n ta b le . S c o p e S o u r c e A v a i l a b l e S c a l e s S c o p e S o u r c e...
Page 95 SECTION 4 OPERATION Pr e s s F 1 t o a c c e s s fu ll s c r e e n O s c i l lo s c o pe w h en c ur sor i s o n S CO P E . S el e c t S c op e S o ur c e be f ore a c c e s s i ng f u l l s c r e en O s c i l l o s c op e .
Page 96 SECTION 4 OPERATION S e l e c t O p e r a t i o n M o d e a s f o l l o w s: MENU A c c e s s e s O p e r a t i o n M o d e m e n u se l e c t i o n s . LIVE S e l e c t s L i ve O p e r a t i o n M o d e .
Page 97 SECTION 4 OPERATION S el e c t H P o s O ff s e t a s n ee d ed . R a ng e i s - 10 t o 1 0 D i vi s i o n s. S et Ver t i ca l Po s i ti o n of tr a c e a s n ee d e d b y ac c e s s i n g V Po s a n d e dit i n g w ith D A T A SC RO LL K e y s or D ATA S CRO L L S p in n er.
Page 98: Spectrum Analyzer Operation Screen
SECTION 4 OPERATION 4-1-6 SPECTRUM ANALYZER OPERATION SCREEN Th e RF G e n er a to r S pec t r um An a l y z er i s u s a bl e a s a n a b br e v i at e d or f ul l s cr ee n S pe c tr um An a l y z er .
Page 99 SECTION 4 OPERATION Pr e s s F 1 t o a c c e s s fu ll s c r e e n S pe c tr um An a ly z e r wh e n c ur s or i s o n A N AL Y Z ER . C o n f i g u r e f u l l s c r e e n S p e ct r u m A n a l y z e r a s f o l l o w s: 105.0000 MHz...
Page 100 SECTION 4 OPERATION S e l e c t O p e r a t i o n M o d e a s f o l l o w s: MENU A c c e s s e s O p e r a t i o n M o d e m e n u se l e c t i o n s . LIVE S e l e c t s L i ve O p e r a t i o n M o d e .
Page 101 SECTION 4 OPERATION A ct i v at e M ar k er a s r e qu ir e d. On/Off A c t i va t e s M a r k e r . E n t e r e d d e si r e d M a r ke r p o si t i o n u s i n g D A T A E N T R Y k e y s o r D A T A S C R O L L K e y s a n d / o r D A T A S C R O L L S p i n n e r .
Page 102: Store And Recall Operation
SECTION 4 OPERATION 4-1-7 STORE AND RECALL OPERATION Pr e s s ST O R E M e mor y K e y t o st or e up t o 5 0 RF G e n er at e O p er at i on S c r e e n c on f ig ur at i on s .
Page 103 SECTION 4 OPERATION Pr e s s RC L M e mor y Key t o r e c a l l u p to 5 0 pr ev i o u s l y s t or e d se tu p s . RF Re c e i v e, RF G en er a t e or D u pl e x O p er at i on S cr ee n co nf i g ur a t io ns c a n a l l b e a c ce s s e d fr o m t h e RF G e ne r a te O pe r a t io n S cr e en .
Page 104 SECTION 4 OPERATION RF RECEIVE OPERATION Th i s s e ct i o n pr o vi d e s in f or ma t io n o n c o nf i gu r i n g th e CO M- 12 0 C t o pe r f or m te s t s o n th e tr a n s m it ter .
Page 105 SECTION 4 OPERATION T o O p e r a t e w i t h S w e e p O p e r a t i o n : SWEEP SWEEP STOP Start: 100.0000 MHz O p e n s S w e e p C o n f i g u r a t i o n W i n d o w . Stop: 200.0000 MHz E n t e r s t a r t f r e q u e n c y , s t o p f r e q u e n c y , i n c r e m e n t f o r sw e e p o p e r a t i o n a n d p a u s e / d e l a y t i m e s a t e a ch...
Page 106 SECTION 4 OPERATION If C e ll u l ar Ch a nn e l L i st o r U ser D ef i n ed Fr e qu e n c y L i st i s s el e c te d, e n te r c ha n ne l /fr e qu e n c y num b e r .
Page 107 SECTION 4 OPERATION 300 kHz S e l e c t s 3 0 0 kH z I F B a n d w i d t h F i l t e r . RF: 10.0000 MHz 15 kHz FL: OFF Input: ANT Atten: 30 dB...
Page 108 SECTION 4 OPERATION MENU Source: GEN1 State: ON Format: TONE O p e n s m e n u w i t h a va i l a b l e f o r m a t s . Freq: 100.0 Hz RETURN Shape: SINE E x i t s s o u r c e w i n d o w .
Page 109 SECTION 4 OPERATION S e l e c t M O D M E T E R S L o w - P a s s F i l t e r F i e l d s e t t i n g a s f o l l o w s: S e t s F i l t e r t o O F F .
Page 110 SECTION 4 OPERATION S e l e c t D E M O D O U T F i e l d se t t i n g a s f o l l o w s : AF CNT A c c e s se s A F C o u n t e r S i g n a l .
Page 111 SECTION 4 OPERATION 4-2-2 SINAD METER OPERATION Th e S IN AD Me t er for th e R F R e ce i v er m e a sur e s SI N A D f o r a 1 k H z t o n e de m od u l at ed f r o m a n R F S i g na l .
Page 112: Fm Deviation Meter Operation
SECTION 4 OPERATION 4-2-4 FM DEVIATION METER OPERATION Th e F M D e v ia t io n M ete r f or t he RF R e c e i ver m e a s ur e s F M D e vi a ti on fo r an RF Si g n a l . Fi lt er i ng , f or th e s i g nal p a s s ed t o t he F M D e vi a ti o n M et er , i s pr o vi de d b y th e A ud i o/ Da t a F i l ter s .
Page 113 SECTION 4 OPERATION I f A v e r a g e F u n c t i o n i s d e s i r e d , c o n f i g u r e a s f o l l o w s: OFF/ON Average: T o g g l e s A ve r a g e F u n ct i o n O N o r O F F .
Page 114: Am Modulation Meter Operation
SECTION 4 OPERATION 4-2-5 AM MODULATION METER OPERATION Th e A M M od u l at i on Me t er f or th e R F Re c e i v er m ea s ur e s A M M od u l at i on f or an RF S ig n a l.
Page 115 SECTION 4 OPERATION I f U p p e r L i m i t F u n ct i o n i s d e s i r e d , co n f i g u r e a s f o l l o w s : OFF/ON 28.0 Upper Limit:...
Page 116: Phase Modulation Meter Operation
SECTION 4 OPERATION 4-2-6 PHASE MODULATION METER OPERATION Th e P ha s e M o du l at i on M e t er for t h e R F R e cei v e r m e a sur e s Ph a s e D e v i at i on f or an RF S ig n a l.
Page 117 SECTION 4 OPERATION I f A v e r a g e F u n c t i o n i s d e s i r e d , c o n f i g u r e a s f o l l o w s: OFF/ON Average: Upper Limit:...
Page 118: Rf Power Meter Operation
SECTION 4 OPERATION 4-2-7 RF POWER METER OPERATION Th e RF P ow er M e ter fo r t he R F Re c e i v er m ea s ur e s p ow er of an RF Si g n a l . RF POWER C o n f i g u r e a n d o p e r a t e t h e R F P o w e r M e t e r a s f o l l o w s : 86.1 mW...
Page 119 SECTION 4 OPERATION I f U p p e r L i m i t F u n ct i o n i s d e s i r e d , co n f i g u r e a s f o l l o w s : OFF/ON Upper Limit: 28.0...
Page 120: Received Level Meter Operation
SECTION 4 OPERATION 4-2-8 RECEIVED LEVEL METER OPERATION Th e Re c e i ve d L e v el Me t er for t h e R F R e ce i ve r m e a sur e s r e fer e n ce d p o wer o f an RF S ig n a l.
Page 121 SECTION 4 OPERATION Connect a coax cable SET LVL from T/R connector O n c e m e t e r i s c o n f i g u r e d , s e t r e f e r e n ce to ANT connector.
Page 122: Rf Frequency Error Meter Operation
SECTION 4 OPERATION 4-2-9 RF FREQUENCY ERROR METER OPERATION Th e RF Fr e q ue n c y E r r or Me te r for t h e R F R ec e i v er m ea s ur e s t he fr e q u e n c y of t h e r e ce i v e d RF S i gn a l a nd r ep or t s th e er r or .
Page 123 SECTION 4 OPERATION I f P e a k H o l d F u n ct i o n i s d e si r e d , t a ke m e t e r o u t o f A u t o r a n g e a n d co n f i g u r e a s f o l l o w s: OFF/ON Peak Hold:...
Page 124: Audio Frequency Counter
SECTION 4 OPERATION 4-2-10 AUDIO FREQUENCY COUNTER Th e A ud i o Fr e q ue n c y C ou n ter f or t he R F Re ce i v e r c ou n t s th e a ud i o f r eq u en c y w h en th e r e c e i ve d RF Si g nal i s m od u la t in g .
Page 125 SECTION 4 OPERATION I f A v e r a g e F u n c t i o n i s d e s i r e d , c o n f i g u r e a s f o l l o w s: OFF/ON T o g g l e s A ve r a g e F u n ct i o n O N o r O F F .
Page 126: Oscilloscope Operation Screen
SECTION 4 OPERATION 4-2-11 OSCILLOSCOPE OPERATION SCREEN Th e RF R e ce i v e O s c i l lo s c o p e i s u s ab l e a s a n a bb r e v i at e d O s c i l lo s co p e or a s a Fu l l S cr ee n O s c il l o s c op e.
Page 127: Duplex Operation
SECTION 4 OPERATION DUPLEX OPERATION Pr e s s in g t he D P L X MO D E K e y a c c e s se s t h e D u p le x O per a ti o n S cr ee n . T he D u p le x Mo d e a l lo w s th e CO M- 1 2 0 C t o a ct a s a tr an sm i t te r an d r e c e i ve r an d t e st a t r a n s c ei v er th at ma y o r ma y no t ha v e a f r e q ue n c y o ff s et .
Page 128 SECTION 4 OPERATION PAIR P a i r s G e n e r a t e a n d R e c e i v e R F o p e r a t i o n . 10.0000 MHz P UNPAIR U n p a i r s G e n e r a t e a n d R e ce i ve R F .
Page 129 SECTION 4 OPERATION S e t M o d u l a t i o n S o u r c e B l o c k a s f o l l o w s : GEN1 I f A u d i o G e n e r a t o r 1 O p e r a t i o n i s d e s i r e d . GEN2 I f A u d i o G e n e r a t o r 2 O p e r a t i o n i s d e s i r e d .
Page 130 SECTION 4 OPERATION E nt er D e vi a ti o n/ M od u la t io n L e v el . S e l e ct t h e d e s i r e d F o r m a t . MENU A c c e s s e s a m e n u w i t h a v a i l a b l e f o r m a t s e l e c t i o n s .
Page 131 SECTION 4 OPERATION If TO N E i s s e le c t ed a s F or ma t, enter Audio Tone Frequency. If TO N E i s s e le c t ed a s F or ma t, enter Shape. Ra n ge i s 5 to 20 0 00 Hz w i th Sh a pe s et t o S IN E .
Page 132: General Duplex Receive Operation
SECTION 4 OPERATION 4-3-2 GENERAL DUPLEX RECEIVE OPERATION E nt er d e s ir e d fr eq u enc y i n R F F i e ld . Fr e qu e n c y r a ng e i s 0 .0 0 0 0 to 1 0 00 . 00 0 0 MH z. A ct i v at e a d di t io n a l fu nc t i o n s a s d e s ir e d.
Page 133 SECTION 4 OPERATION If C e ll u l ar Ch a nn e l L i st o r U ser D ef i n ed Fr e qu e n c y L i st i s s el e c te d, e n te r c ha n ne l /fr e qu e n c y num b e r .
Page 134 SECTION 4 OPERATION 300 kHz S e l e c t s 3 0 0 k H z I F B a n d w i d t h F i l t e r . RF: 10.0000 MHz FL: OFF 15 kHz Input: ANT Atten: 30 dB...
Page 135: Independent Oscilloscope Operation Screen
SECTION 4 OPERATION INDEPENDENT OSCILLOSCOPE OPERATION SCREEN Pr e s s th e S CO P E IN ST R UM E NT S K e y a c ce s s in d ep e nd e nt O sc i l l o s c o pe O p er a t io n S cr e en .
Page 136: Independent Audio/Data/Signaling Generators
SECTION 4 OPERATION INDEPENDENT AUDIO/DATA/SIGNALING GENERATORS Pr e s s th e A UD IO G EN I N STR U M ENT S Ke y t o a c c e s s t he Au d io / Da ta / S ig n al i n g G e ner at or s O per at i o n S c r ee n .
Page 137 SECTION 4 OPERATION E nt er L e ve l a s de s ir ed. E nt er M od e a s d e s ir ed. Level : 0.00 Vp .000 Vrms Mode : CONT US E R F or m at i s c on f ig ur ab l e.
Page 138 SECTION 4 OPERATION S e t L e ve l a t t e n u a t i o n a s f o l l o w s : S e l e ct s X 1 ( t i m e s 1 ) l e v e l a t t e n u a t i o n . Level : 0.00 Vp Mode :...
Page 139: Audio Generator-2 Operation
SECTION 4 OPERATION 4-6-2 AUDIO GENERATOR-2 OPERATION C o n f i g u r e a n d o p e r a t e A u d i o G e n e r a t o r - 2 AUDIO GEN - 2 a s f o l l o w s: Format :...
Page 140: Data Generator Operation
SECTION 4 OPERATION 4-6-3 DATA GENERATOR OPERATION C o n f i g u r e a n d o p e r a t e D a t a G e n e r a t o r a s DATA GEN f o l l o w s : Format :...
Page 141: Dtmf Generator Operation
SECTION 4 OPERATION 4-6-4 DTMF GENERATOR OPERATION C o n f i g u r e a n d o p e r a t e D a t a G e n e r a t o r a s DTMF GEN f o l l o w s: Code :...
Page 142: Meters Operation
SECTION 4 OPERATION METERS OPERATION Th e In d ep e nd e nt M e ter s a r e in d ep e nde n t o f a l l ot h er O p er a t io n M o de s . Pr e s s in g t he M TR S I NS TR U ME NT S Ke y a c c es s e s th e I nd e pe n de n t M e t er s M en u .
Page 143 SECTION 4 OPERATION S e l e c t A ve r a g e F u n c t i o n a s f o l l o w s : OFF/ON Peak Hold: T o g g l e s A ve r a g e F u n ct i o n O N o r O F F . Average: C u r s o r t o S a m p l e N u m b e r t o e n t e r d e si r e d v a l u e .
Page 144 SECTION 4 OPERATION I F S o u r ce i s S C P / D V M A C , A U D I O / D A T A I N o r E X T M O D I N , co n f i g u r e a s f o l l o w s : Vrms C o n v e r t s r e a d i n g u n i t s t o V r m s.
Page 145 SECTION 4 OPERATION THIS PAGE INTENTIONALLY LEFT BLANK. 4-72...
Page 146: Section 5 - Common Practices
SECTION 5 COMMON PRACTICES RF GENERATE This section offer s suggestions for equipment and scr een setups for some common RF G ener ate pr actices. 5- 1- 1 G ener ating FM Modulated RF Signal 5- 1- 2 G ener ating AM Modulated RF Signal 5- 1- 3 G ener ating PM Modulated RF Signal 5- 1- 4...
Page 147: Generating Fm Modulated Rf Signal
SECTION 5 COMMON PRACTICES 5-1-1 GENERATING FM MODULATED RF SIGNAL This pr ocedur e configur es G ener ate O per ation Scr een tr ansmit FM Modulated RF Signal at the T/R Connector . The audio portion of the signal is a 1 kHz sine wave from Audio Generator 1. The deviation is set at 5 kHz.
Page 148 SECTION 5 COMMON PRACTICES RF GEN AUDIO / DATA FILTERS SETUP MENU BAND HIGH WIDE - LINE PASS PASS PASS BAND FILTER FILTER FILTER DTMF / SINAD * * * PRESS "EXEC" TO ACTIVATE SELECTION * * * SPEAKER / PHONES INT - MOD 100.0000 MHz Level:...
Page 149: Generating Am Modulated Rf Signal
SECTION 5 COMMON PRACTICES 5-1-2 GENERATING AM MODULATED RF SIGNAL T h i s p r o ce d u r e co n f i g u r e s t h e R F G e n e r a t e O p e r a t i o n S cr e e n t o t r a n sm i t a n A M M o d u l a t e d R F S i g n a l a t t h e T / R C o n n e c t o r .
Page 150 SECTION 5 COMMON PRACTICES RF GEN AUDIO / DATA FILTERS SETUP MENU BAND HIGH WIDE - LINE PASS PASS PASS BAND FILTER FILTER FILTER DTMF / SINAD * * * PRESS "EXEC" TO ACTIVATE SELECTION * * * SPEAKER / PHONES INT - MOD (Rcvr Center Frequency) Level:...
Page 151: Generating Pm Modulated Rf Signal
SECTION 5 COMMON PRACTICES 5-1-3 GENERATING PM MODULATED RF SIGNAL This pr ocedur e configur es G ener ate O per ation Scr een tr ansmit PM Modulated RF Signal at the T/R Connector . The audio portion of the signal is a 1 kHz sine wave from Audio Generator 1. The deviation is set at 5 Radians.
Page 152 SECTION 5 COMMON PRACTICES RF GEN AUDIO / DATA FILTERS SETUP MENU BAND HIGH WIDE - LINE PASS PASS PASS BAND FILTER FILTER FILTER DTMF / SINAD * * * PRESS "EXEC" TO ACTIVATE SELECTION * * * SPEAKER / PHONES INT - MOD (Rcvr Center Frequency) Level:...
Page 153: Generating Dcs Coded Rf Signal
SECTION 5 COMMON PRACTICES 5-1-4 GENERATING DCS CODED RF SIGNAL This pr ocedur e configur es the RF G ener ate O per ation Scr een to tr ansmit an RF Signal FM Modulated with a DCS Code at the T/R Connector . The deviation is set at 0.50 kHz.
Page 154 SECTION 5 COMMON PRACTICES (Radio Center Frequency) Level: -50.0 dBm Output: DATA Mod Src: DATA Deviation: 0.50 kHz Format: Code: TRANSMITTER OUT 00607222 G ener ating DCS Coded RF Signal 5- 9...
Page 155: Generating Dtmf Coded Rf Signal
SECTION 5 COMMON PRACTICES 5-1-5 GENERATING DTMF CODED RF SIGNAL This pr ocedur e configur es the RF G ener ate O per ation Scr een to tr ansmit an RF Signal FM Modulated with DTMF Code at the T/R Connector . The deviation is set at 5 kHz.
Page 156 SECTION 5 COMMON PRACTICES (Rcvr Center Frequency) Level: -50.0 dBm Output: DTMF Mod Src: DTMF Deviation: 3.50 kHz Code: 123456789*0# Mark: 70 msec Space: 70 msec Pause: 70 msec ANTENNA IN 00607223 G ener ating DTMF Coded RF Signal 5- 11...
Page 157: Generating Rf Signal Using External Modulation
SECTION 5 COMMON PRACTICES 5-1-6 GENERATING RF SIGNAL USING EXTERNAL MODULATION This pr ocedur e configur es the RF G ener ate O per ation Scr een to tr ansmit an RF Signal FM Modulated with 1 kHz Exter nal Modulation Sour ce. The deviation is set at 5 kHz by adjusting the input level of the Modulation Signal.
Page 158 SECTION 5 COMMON PRACTICES GENERATE SCOPE 1 ms/div SOURCE: Scope/DVM - AC (Rcvr Center Frequency) Level: -50.0 dBm Output: Mod Src: EXT Dev Range: NAR 3 Deviation: 5.00 kHz MODULATION SOURCE 00607224 G ener ating RF Signal Using Exter nal Modulation 5- 13...
Page 159: Generating Microphone Modulated Rf Signal
SECTION 5 COMMON PRACTICES 5-1-7 GENERATING MICROPHONE MODULATED RF SIGNAL This pr ocedur e configur es the RF G ener ate O per ation Scr een to tr ansmit a Micr ophone Modulated RF Signal at the T/R Connector . The Micr ophone is connected to the MIC/ACC Connector .
Page 160 SECTION 5 COMMON PRACTICES (Rcvr Center Frequency) Level: -50.0 dBm Output: Mod Src: Dev Range: NAR 3 ANTENNA IN 00607225 G ener ating Micr ophone Modulated RF Signal 5- 15...
Page 161: Encoding 2-Tone Sequential Format
SECTION 5 COMMON PRACTICES 5-1-8 ENCODING 2-TONE SEQUENTIAL FORMAT This pr ocedur e configur es the RF G ener ate O per ation Scr een to encode using the 2- Tone Sequential for mat. This example assumes an FM pager r equir es a fir st tone of 650 Hz for 500 ms and a second tone of 850 Hz for 1.5 sec.
Page 162 SECTION 5 COMMON PRACTICES (Pager Center Frequency) Level: -30.0 dBm Output: GEN1 Mod Src: GEN1 Deviation: 5.0 kHz Format: USER Code: 102 00607247 Encoding 2- Tone Sequential For mat 5- 17...
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Page 164: Rf Receive
SECTION 5 COMMON PRACTICES RF RECEIVE This section offer s suggestions for equipment and scr een setups for some common RF Receive pr actices. 5- 2- 1 Receiving FM Modulated RF Signal 5- 2- 2 Receiving AM Modulated RF Signal 5- 2- 3 Receiving PM Modulated RF Signal 5- 2- 4...
Page 165: Receiving Fm Modulated Rf Signal
SECTION 5 COMMON PRACTICES 5-2-1 RECEIVING FM MODULATED RF SIGNAL This pr ocedur e configur es the RF Receive O per ation Scr een to r eceive a Fr equency Modulated RF Signal at the ANTENNA Connector . The tr ansmitted signal Is 5 kHz deviation of a 1 kHz sine wave at - 60 dBm level.
Page 166 SECTION 5 COMMON PRACTICES RECEIVER AUDIO / DATA FILTERS SETUP MENU BAND HIGH WIDE - LINE PASS PASS PASS BAND FILTER FILTER FILTER MOD METERS 20 kHz DTMF / SINAD AF CNTR/DECODE 4 kHz DATA DECODER * * * PRESS "EXEC" TO ACTIVATE SELECTION * * * SPEAKER / PHONES W.B.
Page 167: Receiving Am Modulated Rf Signal
SECTION 5 COMMON PRACTICES 5-2-2 RECEIVING AM MODULATED RF SIGNAL This pr ocedur e configur es the RF Receive O per ation Scr een to r eceive an Amplitude Modulated RF Signal at the ANTENNA Connector . The tr ansmitted signal has 40% Modulation Rate of a 1 kHz sine wave at - 60 dBm level.
Page 168 SECTION 5 COMMON PRACTICES RECEIVER AUDIO / DATA FILTERS SETUP MENU BAND HIGH WIDE - LINE PASS PASS PASS BAND FILTER FILTER FILTER MOD METERS 20 kHz DTMF / SINAD AF CNTR/DECODE 4 kHz DATA DECODER * * * PRESS "EXEC" TO ACTIVATE SELECTION * * * SPEAKER / PHONES W.B.
Page 169: Receiving Pm Modulated Rf Signal
SECTION 5 COMMON PRACTICES 5-2-3 RECEIVING PM MODULATED RF SIGNAL This pr ocedur e configur es the RF Receive O per ation Scr een to r eceive a Phase Modulated RF Signal at the ANTENNA Connector . The tr ansmitted signal has 5 Radians deviation of a 1 kHz sine wave at - 60 dBm level.
Page 170 SECTION 5 COMMON PRACTICES RECEIVER AUDIO / DATA FILTERS SETUP MENU BAND HIGH WIDE - LINE PASS PASS PASS BAND FILTER FILTER FILTER MOD METERS 20 kHz DTMF / SINAD AF CNTR/DECODE 4 kHz DATA DECODER * * * PRESS "EXEC" TO ACTIVATE SELECTION * * * SPEAKER / PHONES W.B.
Page 171: Decoding 2-Tone Sequential Format
SECTION 5 COMMON PRACTICES 5-2-4 DECODING 2-TONE SEQUENTIAL FORMAT This pr ocedur e configur es the RF Receive O per ation Scr een to decode using the 2- Tone Sequential for mat. Set RF Field to Pager Center Frequency . Set Input to T/R .
Page 172 SECTION 5 COMMON PRACTICES FM DEVIATION METER (Pager Center Frequency) RECEIVER AUDIO / DATA FILTERS SETUP MENU Scp / Demod Cplg: BAND HIGH WIDE - Range: AUTO LINE PASS PASS PASS BAND Peak Hold: FILTER FILTER FILTER Average: MOD METERS Upper Limit: 8.00 DTMF / SINAD...
Page 173: Duplex
SECTION 5 COMMON PRACTICES DUPLEX This section offer s suggestions for equipment and scr een setups for a common Duplex pr actice. This pr ocedur e configur es the Duplex O per ation Scr een to per for m a Receive and G ener ate Sensitivity Check.
Page 174 SECTION 5 COMMON PRACTICES Pr ess F5 EXEC . Pr ess F6 RETURN . Pr ess REC Mode Key. Repeat steps 8 thr ough 16 for Receive O per ation Scr een. Pr ess DPLX Mode Key. Cur sor to RECEIVE field and pr ess F1 ZOOM . Ver ify these r eadings: Analyzer Level - 40 dBm (±...
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Page 176: Section 6 - Options
SECTION 6 OPTIONS INTERNAL BATTERY (OPTION 01) Pr ovides self- contained dc power when exter nal ac or dc power is unavailable. OVEN CRYSTAL OSCILLATOR FREQUENCY STANDARD (OPTION 02) O CXO r eplaces the standar d TCXO as system time base. Pr ovides 0.01 x 10 accur acy.
Page 177: Data Generator/Bit Error Rate (Ber) Meter (Option 07)
SECTION 6 OPTIONS DATA GENERATOR/BIT ERROR RATE (BER) METER (OPTION 07) To access the BER Meter , pr ess SPCL TEST MO DE Key and select the Bit Er r or Rate. The BER Meter is designed for Baseband, RF G ener ate, RF Receive or Duplex Mode. The complexity of the BER Meter is best descr ibed in four separ ate sections.
Page 178 SECTION 6 OPTIONS 4. Input Level Indicator Displays the modulation or voltage level of the Receive Data input sour ce. The level indicator displays an AF Level Meter r eading when the field is set for AUDIO/DATA IN. When the field is set for RF RECEIVER, the Demod field deter mines the display ( i.e., FM- Deviation Meter in kHz, AM- Modulation Meter in % or PM- Phase Meter in Rad) .
Page 179: Ber Meter Configuration Section
SECTION 6 OPTIONS 6-6-1 BER METER CONFIGURATION SECTION This section contains the par ameter s for setting the message size, r ate and patter n as well as infor mation on configur ing the BER Meter . Functions and par ameter s for the BER Meter Configur ation Section ar e as follows: 8.
Page 180 SECTION 6 OPTIONS 15. Upper Limit Displays selected Upper Limit. Status is O FF or O N. When O N Upper Limit Value is displayed. Range of Upper Limit Value is 0 x 10 to 999 x 10 16. Alar m Displays Alar m status.
Page 181: Receive Data Configuration Section
SECTION 6 OPTIONS 6-6-2 RECEIVE DATA CONFIGURATION SECTION This section contains the par ameter s for setting the Receiver Por tion of the BER Meter . Functions and par ameter s for the Receiver por tion of the BER Meter ar e as follows: 17.
Page 182 SECTION 6 OPTIONS 24. High- Pass Filter Displays cur r ent High- Pass Filter setting for demodulated signal. Selections include O FF, 300 Hz and 4 kHz. High- Pass Filter /Low- Pass Filter combination and Bandpass Filter cannot be active simultaneously. 25.
Page 183: Send Data Configuration Section
SECTION 6 OPTIONS 6-6-3 SEND DATA CONFIGURATION SECTION This section contains the par ameter s for setting the Tr ansmitter Por tion of the BER Meter . Functions and par ameter s for the Tr ansmitter por tion of the BER Meter ar e as follows: 31.
Page 184: Single Sideband Receive Filter (Option 08)
SECTION 6 OPTIONS SINGLE SIDEBAND RECEIVE FILTER (OPTION 08) 6-7-1 GENERAL Installation of the Single Sideband Receive IF Filter pr ovides the ability to monitor SSB signals. When Filter is installed, 3 kHz Selection is available for IF Bandwidth Filter . The Single Sideband and 30 kHz IF Filter s ar e mutually exclusive.
Page 185: Rcc Signaling Formats (Option 09)
SECTION 6 OPTIONS RCC SIGNALING FORMATS (OPTION 09) Activates encode capabilities for 10 PS, 20 PS, MTS, IMTS and Tone Remote Contr ol Signaling For mats. These for mats appear as selections for G EN1 RF G ener ate Modulation Sour ce, G EN1 Duplex G ener ate Modulation Sour ce and Audio Function G ener ator - 1.
Page 186 SECTION 6 OPTIONS Tone Number T o n e 0 T o n e 1 7 4 1 6 3 1 1 0 9 7 0 1 0 7 4 1 3 . 1 T o n e 2 8 8 2 6 9 7 1 1 8 8 2 2 .
Page 187 SECTION 6 OPTIONS Encoding of the analog for mats is available in RF G ener ate, Duplex G ener ate and Audio/Data/Signaling G ener ator s O per ation Scr eens. In the RF G ener ate and Duplex G ener ate O per ation Scr eens, these for mats ar e accessed by selecting G EN1 ( Audio G ener ator - 1) as a modulation sour ce.
Page 188: Modulating Rf Signals With Digital Signaling Formats
SECTION 6 OPTIONS 6-9-1 MODULATING RF SIGNALS WITH DIGITAL SIGNALING FORMATS Digital Signaling For mats can be used as a modulation sour ce in both RF G ener ate and Duplex G ener ate O per ation. With O ption 11 installed, optional Digital Signaling For mats ar e accessed by selecting the DATA G ener ator as the Modulation Sour ce.
Page 189 SECTION 6 OPTIONS Data Rates 512, 1200 and 2400 bps ar e only displayed with cur sor at Data Rate field. PO CSAG Functions include: F u n c t i o n D e s c r i p t i o n 1 B E E P C a u s e s p a g e r t o b e e p o n e t i m e .
Page 190: Encoding Digital Signaling Formats For Audio Signal
SECTION 6 OPTIONS 6-9-2 ENCODING DIGITAL SIGNALING FORMATS FOR AUDIO SIGNAL With O ption 11 installed, the DATA G ener ator in the Audio/Data/Signaling G ener ator s O per ation Scr een has PO CSAG and PO CSAG Inver ted ( PO CSAG /) For mats in addition to the DCS and DCS Inver ted ( DCS/) For mats contained in the standar d set.
Page 191: Decoding Digital Signaling Formats
SECTION 6 OPTIONS 6-9-3 DECODING DIGITAL SIGNALING FORMATS With O ption 11 installed, the RF Receive O per ation Scr een and the Duplex Receive O per ation Scr een ar e configur able to decode PO CSAG and Inver ted PO CSAG signals. A specific decode scr een is pr ovided for each Digital Signaling for mat type POCSAG DECODE FUNC BITS: AUTO...
Page 192: Testing A Receiver Using Digital Signaling Formats
SECTION 6 OPTIONS 6-9-4 TESTING A RECEIVER USING DIGITAL SIGNALING FORMATS This pr ocedur e is an example for testing a Receiver using Digital Signaling For mats. In this pr ocedur e, an RF signal is modulated with a PO CSAG message. Pr ess G EN Test Mode Key to access RF G ener ate O per ation Scr een.
Page 193: Testing A Transmitter Using Digital Signaling Formats
SECTION 6 OPTIONS 6-9-5 TESTING A TRANSMITTER USING DIGITAL SIGNALING FORMATS This pr ocedur e is an example for testing a Tr ansmitter using Digital Signaling For mats. In this pr ocedur e, an RF signal is r eceived and demodulated for the PO CSAG message. Pr ess REC Test Mode Key to access RF Receive O per ation Scr een.
Page 194: Spectrum Analyzer Tracking Generator (Option 12)
SECTION 6 OPTIONS 6-10 SPECTRUM ANALYZER TRACKING GENERATOR (OPTION 12) O ption 12 pr ovides inter nal Tr acking G ener ator for use with Spectr um Analyzer . A new field is displayed for tur ning on the Tr acking G ener ator . Field displays O FF or Tr acking G ener ator Level.
Page 195: Ieee 488 (Gpib) Interface (Option 13)
6-11 IEEE 488 (GPIB) INTERFACE (OPTION 13) 6-11-1 GENERAL Pr ovides par allel G PIB inter face for r emote oper ation. Refer to COM-120C TMAC Manual for additional information on CO M- 120C Remote O per ation and Commands.
Page 196: Clearchannel Ltr ® (Option 14)
SECTION 6 OPTIONS 6-12 CLEARCHANNEL LTR ® (OPTION 14) 6-12-1 GENERAL The CLEARCHANNEL LTR ® O ption allows the testing of Tr unked Repeater s and Radios. The CO M- 120C tests encode/decode, Repeater access and Handoff functions of Tr unked Radio mobile units. The CO M- 120C tests Handshake and Handoff functions of Repeater s.
Page 197 SECTION 6 OPTIONS 6-12-2 ACCESSING THE CLEARCHANNEL LTR ® TRUNKING TEST SYSTEM CLEARCHANNEL LTR ® testing is accessed by pr essing the SPCL Test Mode Key and accessing “ 3. LTR Tr unking.” When accessed, the LTR Tr unking Menu is displayed. The LTR Tr unking Functions ar e as follows: LTR Trunking Choose test:...
Page 198: Ltr Trunking Repeater Simulation
SECTION 6 OPTIONS 6-12-3 LTR TRUNKING REPEATER SIMULATION The LTR Repeater Simulator is designed to test mobile phones. O nce the LTR System is pr oper ly configur ed, continuous paging of the mobile phone is possible. G o to the Duplex O per ation Scr een and set DATA G ener ator to LTR. Featur es of the LTR Tr unking Repeater Simulator O per ation Scr een ar e as follows: LTR TRUNKING REPEATER SIMULATOR...
Page 199 SECTION 6 OPTIONS 4. G ener ate RF Field Displays RF G ener ate Fr equency of CO M- 120C. Value is dependent on Channel Number ( 1) and Band Selection ( 2) . Field is for display only. For mula for figur ing value is as follows wher e Channel # is Channel Number ( 1) : 800 MHz Band Selection ( 2) Fr equency ( MHz) = 806.0125 + [0.025 x ( Channel # - 1) ]...
Page 200 SECTION 6 OPTIONS 11. Deviation/Modulation Level Displays selected Deviation in kHz if cur r ent Modulation Type ( 9) is FM with r ange fr om 0.00 to 100 kHz. Displays selected Per cent Modulation if cur r ent Modulation Type ( 9) is AM with r ange fr om 0.0% to 100%.
Page 201 SECTION 6 OPTIONS 20. Input Displays selected Input Connector . Selections ar e ANT ( ANTENNA Connector ) or T/R ( T/R Connector ) . 21. Attenuation Displays selected Input Attenuation. Selections ar e 0 or 30 dB. Tr unking Data Block is used to set the Repeater par ameter s that ar e passed to the Mobile Radios.
Page 202: Transmit Trunking Data Block
SECTION 6 OPTIONS 6-12-4 TRANSMIT TRUNKING DATA BLOCK 23. G oto Displays Repeater Number to use for Status ( 25) set to Continuous. Must match Home ( 27) for Mobile Radio to unsquelch. Range is 1 to 31. Area Goto Home Group 24.
Page 203: Receive Trunking Data Block
SECTION 6 OPTIONS 6-12-5 RECEIVE TRUNKING DATA BLOCK The Receive Tr unking Data Block is used to display the Mobile Radio par ameter s that ar e passed to the Repeater . This infor mation is for display only and cannot be edited. 29.
Page 204: Ltr Trunking Radio Simulation
SECTION 6 OPTIONS 6-12-6 LTR TRUNKING RADIO SIMULATION LTR TRUNKING RADIO SIMULATOR Ch #: Band: 800 MHz Extended Meas: RECEIVE GENERATE 851.0125 806.0125 Atten: 0 dB Level: -40.0 dBm Input: Output: Area Goto Area In Use Home Group Home Group Free Free GEN-1...
Page 205 SECTION 6 OPTIONS Radios oper ating in 800 MHz Band within r ange of Canada or Mexico must use a 12.5 kHz offset. 5. Level Displays O utput Level. Range is dependent on O utput ( 6) . O utput set to T/R is - 130 to - 20 dBm.
Page 206 SECTION 6 OPTIONS 13. AUDIO /DATA IN Meter s Displays selected meter for measur ing audio input to AUDIO /DATA IN Connector . Selections include Distor tion, SINAD and AF LEVEL Meter s. If one of these meter s is active, Deviation Meter ( 16) , AF Fr equency Meter ( 15) , Distor tion/ DTMF Meter ( 14) and LTR Tr unking ar e deactivated.
Page 207 SECTION 6 OPTIONS 22. Receive RF Field Displays RF Receive Fr equency of CO M- 120C. Value is dependent on Channel Number ( 1) and Band Selection ( 2) . Band automatically changes to USER if this field is edited. For mula for figur ing value is as follows wher e Ch # is Channel Number (1): 800 MHz Band Selection ( 2) Fr equency ( MHz) = 851.0125 + [.025 x ( Channel # - 1) ]...
Page 208: Transmit Trunking Data Block
SECTION 6 OPTIONS 6-12-7 TRANSMIT TRUNKING DATA BLOCK The Tr ansmit Tr unking Data Block is used to set the Mobile Radio par amater s that ar e passed to the Repeater . This infor mation, as well as the Channel Number ( 1) and Band Selection ar e r equir ed to test a Repeater .
Page 209: Receive Trunking Data Block
SECTION 6 OPTIONS 6-12-8 RECEIVE TRUNKING DATA BLOCK The Receive Tr unking Data Block is used to display the Repeater par ameter s that ar e passed to the Mobile Radio. This infor mation is for display only and cannot be edited. 29.
Page 210: Ltr Trunking Auxiliary Setup Screen
SECTION 6 OPTIONS 6-12-9 LTR TRUNKING AUXILIARY SETUP SCREEN The LTR Tr unking Auxiliar y Setup Scr een is pr ovided to setup additional system par ameter s. This scr een must be configur ed befor e oper ating the LTR Tr unking Repeater Simulator or the LTR Tr unking Radio Simulator .
Page 211 . Incr ease the time to help the r epeater . 10. Max Retr ies Sets the number of times the COM-120C tries to connect to the repeater. Factor y default is 3. 11. Retr y Timeout Tells the CO M- 120C how long to wait for the r epeater r esponse.
Page 212: Auxiliary Setup Screen Configuration
SECTION 6 OPTIONS 6-12-10 AUXILIARY SETUP SCREEN CONFIGURATION Fr om LTR Tr unking Menu, select “ 3. Auxiliar y Setup.” If Mobile Radio RIC Test is r equir ed, set RADIO RIC ID ( 1) to Radio Inter connect Channel ( RIC) . IF RIC O per ation is not r equir ed, set to value with no Dispatch O per ation inter fer ence.
Page 213: Repeater Simulator Operation
SECTION 6 OPTIONS 6-12-11 REPEATER SIMULATOR OPERATION The Repeater Simulator is used to test LTR Mobile Radios. To test LTR Mobile Radios, knowledge of the Radio Configur ation Data, for the Radio under test, is r equir ed. This section is divided into par agr aphs. The fir st par agr aph is G ener al Configur ation and the r emaining par agr aphs ar e differ ent tests.
Page 214 SECTION 6 OPTIONS If Distor tion/DTMF Meter O per ation is r equir ed, select desir ed Meter . Configur e Deviation Meter ( 16) . Select Input ( 20) for desir ed Input Connector . Selections include T/R ( T/R Connector ) and ANT ( ANTENNA Connector ) .
Page 215: Ltr Radio Handshake Test
SECTION 6 OPTIONS 6-12-12 LTR RADIO HANDSHAKE TEST This test ver ifies the CO M- 120C is able to link with the Mobile Radio and a pr oper encode/decode sequence is per for med. Per for m these additional tests simultaneously: RF Power , RF Er r or , Voice FM Deviation, Data FM Deviation, Distor tion and AF Fr equency Measur ements.
Page 216: Ltr Radio Handoff Test
SECTION 6 OPTIONS 6-12-13 LTR RADIO HANDOFF TEST This test ver ifies that the CO M- 120C is able to link with the Mobile Radio and a pr oper Handoff to a fr ee r epeater is per for med. Per for m these additional tests simultaneously: RF Power , RF Er r or , Voice FM Deviation, Data FM Deviation, Distor tion and AF Fr equency Measur ements.
Page 217: Ltr Radio Receive Test
SECTION 6 OPTIONS 6-12-14 LTR RADIO RECEIVE TEST This test ver ifies that the CO M- 120C is able to link with the Mobile Radio and an audio modulated RF Signal tr ansmitted by the CO M- 120C is r eceived by the Mobile Radio. Per for m these additional tests simultaneously: AUDIO /DATA IN Meter s to measur e Distor tion, SINAD and AF Level of the signal demodulated by the Mobile Radio.
Page 218: Radio Simulator Operation
SECTION 6 OPTIONS 6-12-15 RADIO SIMULATOR OPERATION The Radio Simulator is used to test LTR Repeater s. To test LTR Repeater s, knowledge of the Radio Configur ation Data is r equir ed for the Mobile Radios that ar e ser viced by the Repeater being tested.
Page 219 SECTION 6 OPTIONS Configur e Deviation Meter ( 16) . Select Input ( 20) for desir ed Input Connector . Selections include T/R ( T/R Connector ) and ANT ( ANTENNA Connector ) . If Repeater output is >0 dBm, select T/R. If ANT Input ( 20) is selected and Repeater O utput is >30 dBm, set Attenuation ( 21) for 30 dB.
Page 220: Ltr Repeater Handshake Test
SECTION 6 OPTIONS 6-12-16 LTR REPEATER HANDSHAKE TEST This test ver ifies that the CO M- 120C is able to link with the Repeater and a pr oper encode/decode sequence is per for med. Per for m these additional tests simultaneously: RF Power , RF Er r or , Voice FM Deviation, Data FM Deviation, Distor tion and AF Fr equency Measur ement.
Page 221: Amps Cellular Testing (Option 15)
SECTION 6 OPTIONS 6-13 AMPS CELLULAR TESTING (OPTION 15) The AMPS Cell Site Simulator is O ption 15 of the CO M- 120C and is used to test AMPS Mobile Telephone Equipment. This option is accessed by pr essing SPCL Test Mode Key and selecting “...
Page 222: Amps Cell Site Simulator Main And Setup Menus
SECTION 6 OPTIONS 6-13-2 AMPS CELL SITE SIMULATOR MAIN AND SETUP MENUS Pr ess the SPCL Mode Key. Choose “ 2. Cellular ” to access the AMPS Cellular Menu. The Automatic and Manual Tests and Setup Scr eens ar e selected fr om this Menu. AMPS Cellular Choose test: 1.
Page 223 SECTION 6 OPTIONS AMPS Cellular Setup Parameters Control Channel Voice Channel Home/Roam Select HOME Mobile I.D. 3166486263 Mobile Serial No. 26314782194 SAT Frequency 5970 Hz Home/Area I.D. 00163 Digital Color Code Power Level Ref SINAD Test Ref 12 dB C-MSG Customer Information 8717092 1.
Page 224 SECTION 6 OPTIONS 7. Home/Ar ea I.D. Selects System Identification Number ( SID) used to test Home System Identification of Mobile Phone. Length is 5 digits. Select using DATA ENTRY Keys. Pr ess ENTER Key to complete edit. 8. Digital Color Code Selects Digital Color Code (DCC) simulated.
Page 225 SECTION 6 OPTIONS AMPS Cellular Setup Parameters Pass/Fall Indicator ENABLED Print-Out DISABLED Handoff Start Handoff end Handoff Increment Power Lev Tolerance 15 % RF Freq Err Tolerance 1.00 kHz SAT Freq Tolerance 1 Hz ST Freq Tolerance 1 Hz SAT Dev Tolerance 10 % ST Dev Tolerance 13 %...
Page 226 SECTION 6 OPTIONS 6. Power Lev Toler ance Selects toler ance used for Power Level Test. Consists of two editable fields: Positive Toler ance and Negative Toler ance. Range for both fields is fr om 0% to 99% or 0 to 99 dB. For each field, select using DATA ENTRY Keys. Pr ess ENTER Key to complete edit.
Page 227: Amps Cell Site Simulator Automatic Tests
SECTION 6 OPTIONS 6-13-3 AMPS CELL SITE SIMULATOR AUTOMATIC TESTS The AMPS Automatic Test Scr een is accessed by selecting “ 1. Automatic Test” fr om the AMPS Cellular Menu. Tests listed on the AMPS Automatic Test Scr een ar e per for med individually or in any combination except Mobile Init and Cell Init Tests must be per for med if Handoff Test or Audio Test is desir ed.
Page 228: Registration Test
SECTION 6 OPTIONS 6-13-4 REGISTRATION TEST The Registr ation Test sends a Registr ation or der to the Mobile Phone. The r egistr ation par ameter s of the Mobile Phone tested and displayed. To perform the Registration Test, verify the Registr ation Field is ENABLED. Registr ation Test r esults appear following test completion.
Page 229 SECTION 6 OPTIONS 9. DTMF Displays DTMF digits tr ansmitted after “ ENTER DIG ITS” pr ompt. 10. Flash Dur Displays Flash Hook signal time dur ation tr ansmitted by Mobile Phone under test. 11. ST F r eq Displays Signal Tone fr equency tr ansmitted by Mobile Phone under test. 12.
Page 230 SECTION 6 OPTIONS AMPS Cellular Automatic Test Registration FINISHED Mobile Init FINISHED Cell Init FINISHED Handoff Test FINISHED Audio Test FINISHED Called Adr: 6823819 V Chan: SAT Freq: 5970 Hz DTMF 123456789"0" Freq Err: 0.06 kHz SAT Dev: 2.37 kHz Flash Dur: 390 msec TX Pwr:...
Page 231 SECTION 6 OPTIONS 25. RF Fr eq Er r Displays er r or of Rever se Voice Channel Fr equency r eceived fr om Mobile Phone. 26. Ring Dev Displays Signal Tone Deviation r eceived fr om Mobile Phone in r esponse to Page or der .
Page 232: Handoff Test
SECTION 6 OPTIONS 6-13-5 HANDOFF TEST The Handoff Test per for ms a ser ies of handoffs to differ ent Channels. The fir st handoff is to the Handoff Star t Channel. All other handoffs go to the next channel by adding the Handoff Incr ement to the cur r ent Channel until the Handoff End Channel r eceives a handoff.
Page 233: Audio Test
SECTION 6 OPTIONS 6-13-6 AUDIO TEST The Audio Test measur es Audio Distor tion, Audio Power and RF Input Power r equir ed to maintain a SINAD Level. Connect the Phone Audio O ut to the CO M- 120C AUDIO /DATA IN Connector .
Page 234: Mobile Init Test
SECTION 6 OPTIONS 6-13-7 MOBILE INIT TEST The Mobile Init ( Initiated) Test r equir es a call to be initiated fr om the Mobile Phone. The following pr ocedur e per for ms the Mobile Init ( Initiated) Test: With cur sor on Mobile Init, pr ess F2 ENABLED=.
Page 235: Cell Init Test
SECTION 6 OPTIONS 6-13-8 CELL INIT TEST The Cell Init ( Cell Site Initiated) Test simulates a call fr om the Cell Site. The following pr ocedur e per for ms the Cell Init Test: With cur sor on Cell Init, pr ess F2 ENABLED. Pr ess F3 START to star t test. “...
Page 236: Automatic Test Printout
SECTION 6 OPTIONS 6-13-9 AUTOMATIC TEST PRINTOUT If “ 2. Pr int- O ut” is enabled on Page 2 of the AMPS Setup Menu, the per for med test r esults ar e pr inted on a device connected to the RS- 232 Connector . A Pr intout for all Automatic Tests is shown her e.
Page 237: Amps Cell Site Simulator Manual Tests
SECTION 6 OPTIONS 6-13-10 AMPS CELL SITE SIMULATOR MANUAL TESTS The AMPS Manual Test Scr een is accessed by selecting “ 2. Manual Test” fr om the AMPS Cellular Menu. 1. Reg AMPS Cellular Initiates Manual Registr ation Manual Test Test.
Page 238: Registration Test
SECTION 6 OPTIONS 6-13-11 REGISTRATION TEST The Registr ation Test simulates a Registr ation or der fr om the Cell Site and tests the Mobile Phone’s r esponse. To per for m the Registr ation Test, pr ess F1 REG . After the Registr ation Tests ar e completed, r esults ar e displayed.
Page 239: Mobile Init Test
SECTION 6 OPTIONS 6-13-12 MOBILE INIT TEST The Mobile Init ( Initiated) Test r equir es a call to be initiated fr om the Mobile Phone. To per for m the Mobile Init Test, pr ess F2 MO BILE fr om AMPS Manual Test Menu. “...
Page 240 SECTION 6 OPTIONS 16. Analy Accesses Spectr um Analyzer for use with Cellular Testing. Additional Field with Cellular Spectr um Analyzer is Retur n Cellular Field for r etur ning to Manual Mobile Init Test Scr een. 17. Scope Accesses O scilloscope for use with Cellular Testing. Additions for Cellular O scilloscope include allowing Demod Audio for input Sour ce and Retur n Cellular Field for r etur ning to Manual Mobile Init Test Scr een.
Page 241 SECTION 6 OPTIONS 21. Power Level Test Each time a power level is enter ed, a VMAC message is sent to change the power level of the Mobile Phone to the level enter ed. To enter a power level, use DATA ENTRY Keys to enter a power level and pr ess ENTER Key.
Page 242: Cell Init Test
SECTION 6 OPTIONS 6-13-13 CELL INIT TEST The Cell Init ( Initiated) Test places a call to the Mobile Phone. To per for m the Cell Init Test, pr ess F3 CELL fr om AMPS Manual Test Menu. “ Paging Mobile” , “ Page Answer ed” and “...
Page 243 SECTION 6 OPTIONS 32. Analy Accesses Spectr um Analyzer for use with Cellular Testing. Additional Field with Cellular Spectr um Analyzer is Retur n Cellular Field for r etur ning to Manual Mobile Init Test Scr een. 33. Scope Accesses O scilloscope for use with Cellular Testing. Additions for Cellular O scilloscope is allowing Demod Audio for input Sour ce and Retur n Cellular Field for r etur ning to Manual Mobile Init Test Scr een.
Page 244 SECTION 6 OPTIONS 37. Power Level Test Each time a power level is enter ed, a VMAC message is sent to change the power level of the Mobile Phone to the level enter ed. To enter a power level, use DATA ENTRY Keys to enter a power level and pr ess ENTER Key.
Page 245: Edacs Trunking (Option 16)
SECTION 6 OPTIONS 6-14 EDACS TRUNKING (OPTION 16) The EDACS Tr unking O ption is used to test r adios and r epeater s of the EDACS tr unked- r adio signaling type. EDACS Tr unked Radio System is a pr oduct of G E/Er icsson. The CO M- 120C EDACS O ption r uns in manual and automatic modes for r adio and r epeater testing.
Page 246: Edacs Trunking Setup Screen
SECTION 6 OPTIONS 6-14-1 EDACS TRUNKING SETUP SCREEN EDACS Tr unking Setup Scr een. 1. Contr ol Chan EDACS Trunking Setup Parameters Mobile Rx Mobile Tx This field is used to select a 811.2125 856.2125 CONTROL CHAN logical channel for use as a 857.2125 812.2125 WORKING CHAN...
Page 247: Edacs Trunking Channel Assignments
SECTION 6 OPTIONS 6-14-2 EDACS TRUNKING CHANNEL ASSIGNMENTS This field is used to pr ogr am the 20 logical channels for the EDACS Tr unking tests. These pr ogr ammed fr equencies ar e used for all channels r efer enced in the Automatic and Manual Tests.
Page 248: Edacs Trunking Automatic Test
SECTION 6 OPTIONS 6-14-3 EDACS TRUNKING AUTOMATIC TEST EDACS Tr unking Automatic Test Scr een consists of 4 main par ts. Registr ation, Radio Test, Repeater Test and Audio Test. Each Test is either ENABLED or DISABLED. This state of the Automatic Test is r efer r ed to as the ‘Idle’ state. All Automatic Tests ar e r un with the UUT connected to the T/R por t for both tr ansmit and r eceive oper ations.
Page 249: Edacs Trunking Automatic Test Execution
SECTION 6 OPTIONS 6-14-4 EDACS TRUNKING AUTOMATIC TEST EXECUTION Pr ess F3 START to execute the Automatic Test. At least one of these tests must be ENABLED: Registr ation, Radio Test or Repeater Test. If one or mor e of these tests is not ENABLED, the scr een displays, “...
Page 250 SECTION 6 OPTIONS If the Audio Test is ENABLED, it is per for med next on the Radio. The field status changes to RUNNING and the scr een prompts to, “Install Audio Connectors. Pr ess CO NT when r eady” . It is extr emely impor tant that audio connections to the Radio ar e installed cor r ectly.
Page 251: Edacs Trunking Automatic Test Results
SECTION 6 OPTIONS 6-14-5 EDACS TRUNKING AUTOMATIC TEST RESULTS After Automatic Testing is complete, use the softkeys to display or pr int the r esults. Pr ess F2 to show the fir st page of r esults. Results appear in the lower half of the EDACS Tr unking Automatic Test scr een.
Page 252 SECTION 6 OPTIONS These ar e all the test r esults available for the Audio Test- Radio except for the Tx Audio Response r esults. Some of these r esults ar e based on the Rated O utput of the r adio. This is acquir ed by injecting a 1 kHz sine wave via the Data G en output jack and r aising the level until 3 kHz ( 1.5 kHz for nar r ow band) of deviation is tr ansmitted by the r adio.
Page 253 SECTION 6 OPTIONS RX AUDIO SENSITIVITY This r esult is the AF Level r ead back fr om the Radio’s audio output path with a 1 kHz sine wave FM- gener ated at 3 kHz ( 1.5 kHz for nar r ow band) deviation, - 50.0 dBm level, fr om the CO M- 120C to the Radio’s antenna input ( Radio must have r eceiver unsquelched) .
Page 254 SECTION 6 OPTIONS Results: Repeater Test WO RKING CHANNEL [Reptr] Shows the Repeater ’s Repeater Rx Repeater Tx Receive/G ener ate RF WORKING CHANNEL 857.2125 812.2125 Fr equencies used for the test. TX FREQ ERROR: -0.199 kHz TX RF POWER: 827.4 mW 0061600 TX FREQ ERROR...
Page 255 SECTION 6 OPTIONS TX MODULATION LIMITING (Burst) This r esult is the peak deviation r eading ( in kHz) of the Repeater tr ansmitter modulation with a bur st of 1 kHz sine wave injected into the Repeater ’s audio- in path fr om the CO M- 120C Data G en output baseband jack at a level which is 20 dB higher than 60% of the Repeater ’s Rated O utput.
Page 256 SECTION 6 OPTIONS Automatic Test Results (Printout) Pr intouts of the Automatic Tests ar e acquir ed by pr essing F4 PRINT after an automatic test has completed. Results ar e pr inted out the ser ial ( RS- 232) por t on the CO M- 120C r ear panel.
Page 257: Edacs Trunking Manual Test
SECTION 6 OPTIONS 6-14-6 EDACS TRUNKING MANUAL TEST The EDACS Tr unking Manual Test consists of 2 main par ts. A Repeater Simulator for testing EDACS Radios and a Radio Simulator for testing EDACS Repeater s. 1. Rept Sim Accesses the EDACS EDACS Trunking Repeater Simulator Scr een.
Page 258: Edacs Trunking Manual Test-Repeater Simulator
SECTION 6 OPTIONS 6-14-7 EDACS TRUNKING MANUAL TEST-REPEATER SIMULATOR Enter ing the Repeater Simulator causes the CO M- 120C to per for m an FM- Zer o oper ation to adjust the Receiver ’s DC offset to zer o. The scr een displays the message: “...
Page 259 SECTION 6 OPTIONS 3. RF: ( Receive) This field shows the cur r ent RF Fr equency of the EDACS Wor king Channel for the Receiver side of the Repeater Simulator . This field is editable ( which puts the Wor king Channel in ‘Manual’...
Page 260 SECTION 6 OPTIONS 13. Distor tion: ( Receive) This field shows the Radio’s Tr ansmitter Distor tion in %. Value r ange: 0.0 to 20.0%. Also used to show decoded DTMF digits by pr essing the DTMF softkey. 14. Extended Meas: This field allows access to one of thr ee exter nal scr eens: Scope, Analyzer or Digital Voltmeter ( DVM) .
Page 261 SECTION 6 OPTIONS 19. Message: Br iefly shows the last EDACS message r eceived fr om the Radio. Display- only field. GROUP CALL A G r oup Call message is r eceived fr om the Radio. UN- KEYED An un- keyed message is r eceived fr om the Radio. EMER G RO UP An Emer gency G r oup Call message is r eceived fr om the Radio.
Page 262 SECTION 6 OPTIONS 24. Subaud dev: This field is active when the selected sour ce, DATA, is modulated. This contr ols the deviation of the sub- audible data used dur ing established call pr ocessing with the EDACS Radio. Value r ange: 0.00 to 100.0 kHz. Should be ≤ Deviation (20). The recommended default value is 0.70 kHz (0.35 kHz for narrow band).
Page 263: Edacs Trunking Manual Test-Radio Simulator
SECTION 6 OPTIONS 6-14-8 EDACS TRUNKING MANUAL TEST-RADIO SIMULATOR Enter ing the Repeater Simulator causes the CO M- 120C to per for m an FM- Zer o oper ation to adjust the Receiver ’s DC offset to zer o. The scr een displays the message: “...
Page 264 SECTION 6 OPTIONS 1. CH#: This field is used to change the EDACS Contr ol Channel Number ( pr e- pr ogr ammed in the Setup Scr een) . Value r ange: 1 to 20. The cor r esponding RF Fr equencies ar e shown in the RF fields as the CH# field is edited.
Page 265 SECTION 6 OPTIONS 10. Deviation: ( Receive) This field shows the Repeater ’s Tr ansmit Deviation for Voice or Data in kHz. A ‘V’ symbol means Voice Deviation. A ‘D’ symbol means Data Deviation ( low- fr equency data) . Value r ange: 0.00 to 100.0 kHz. 11.
Page 266 SECTION 6 OPTIONS 17. Status This field shows the cur r ent status of the Radio Simulator . Display- only field. Valid status values: No Contr ol Channel over head found fr om the Repeater . No calls accepted in this state. IDLE Radio is locked into a Repeater Site and is waiting to make a G r oup Call or accept a G r oup Call.
Page 267 SECTION 6 OPTIONS 21. Modulation: This field is active when the selected sour ce is AM modulation type. This contr ols the modulation of the selected sour ce. Value r ange: 0.0% to 100.0%. 22. Fr equency: This field is active when the selected sour ce, G EN1 or G EN2, is modulated. This selects the Audio Fr equency of the selected Function G ener ator sour ce ( sine wave) .
Page 268: Edacs High-Speed Data Capture (Scope)
SECTION 6 OPTIONS 6-14-9 EDACS HIGH-SPEED DATA CAPTURE (SCOPE) Access the EDACS Repeater or Radio Simulator Extended Measur e Scope. Set H Pos negative to view the dotting or bar ker code befor e the data. Cur sor to Tr ig Type field.
Page 269: Edacs Store And Recall
SECTION 6 OPTIONS 6-14-10 EDACS STORE AND RECALL The CO M- 120C pr ovides the ability to stor e and r ecall EDACS system configur ations. Data is stor ed to one of 50 standar d stor ed test setups under the Type EDACS. Pr ess the STO RE Har d Key in any EDACS O ption scr een for this menu window: 1.
Page 270: Edacs Trunking Operational Notes
SECTION 6 OPTIONS 6-14-11 EDACS TRUNKING OPERATIONAL NOTES This section pr ovides some notes and hints on oper ating the EDACS Tr unking O ption of the CO M- 120C. Squelch Setting The squelch knob setting on the CO M- 120C unit is ver y impor tant for all testing. While in the EDACS Tr unking Main Scr een with no RF being tr ansmitted into the CO M- 120C unit, tur n the squelch knob full counter clockwise.
Page 271: Mpt 1327 Trunking (Option 17)
SECTION 6 OPTIONS 6-15 MPT 1327 TRUNKING (OPTION 17) The MPT 1327 Tr unking O ption allows pr otocol and par ametr ic testing of r adio units and tr unking system contr oller s ( r epeater s) designed oper ation MPT 1327 tr unked pr ivate land mobile r adio systems.
Page 272: Setup Network Definition
SECTION 6 OPTIONS 6-15-1 SETUP NETWORK DEFINITION The SETUP scr een allows the customization of networ k definitions. NAME This field allows networ k definition assigned descr iptive label 19 char acter s. This par ameter is optional and has no effect on the system oper ation.
Page 273 SECTION 6 OPTIONS DEFAULT CHANNELS The fir st contr ol channel is the channel the CO M- 120C uses on entr y to all the test scr eens. The second contr ol channel is used by the automatic test mode for the MO VE test.
Page 274: Syscode Calculation
SECTION 6 OPTIONS 6-15-2 SYSCODE CALCULATION The system codewor d is used when gener ating contr ol channel signalling as a system identifier . When testing Radio Units, the cor r ect SYSCO DE allows the RU under test to go into ser vice.
Page 275: Channel Numbering
SECTION 6 OPTIONS 6-15-3 CHANNEL NUMBERING It is impor tant the fir st contr ol channel number used her e is a channel defined in the Nor mal Hunt table of the Radio Unit. Although an RU is instr ucted to MO VE to another contr ol channel, a channel is not acquir ed unless the channel is in the Nor mal Hunt table.
Page 276: Base Frequencies
SECTION 6 OPTIONS 6-15-4 BASE FREQUENCIES Ever y networ k has a channel plan, identifying a channel number with a specific tr ansmit and r eceive fr equency. G ener ally this plan is r efer enced back to an initial BASE fr equency which is either logical channel 0 or occasionally logical channel 1.
Page 277: Trunking Simulator Screens
SECTION 6 OPTIONS 6-15-5 TRUNKING SIMULATOR SCREENS In the manual test modes, the CO M- 120C simulates either a tr unked single site r epeater ( to test r adio units) or a tr unked r adio unit ( to test r epeater s) . In automatic test mode, the CO M- 120C simulates a tr unked single site r epeater contr olled by a configur able automated test pr ocedur e.
Page 278 SECTION 6 OPTIONS 10. Level G ener ator output level. Range is dependent on output; for T/R output selection r ange is - 130 to - 40 dBm, for AUX ouput selection r ange is - 130 to –13 dBm. 11.
Page 279: Repeater Simulator
SECTION 6 OPTIONS 6-15-6 REPEATER SIMULATOR In the manual Repeater Simulator mode, all editable fields ar e available. 1. Pr efix MPT 1327 pr efix of the RU under test. Valid r ange is 0 to 127. 2. Ident MPT 1327 identity of the RU under test. Valid r ange is 0 to 8191. 3.
Page 280: Testing Radio Units
SECTION 6 OPTIONS 6-15-7 TESTING RADIO UNITS When testing a Radio Unit, the most commonly used mode is the manual REPEATER SIMULATO R. In this mode the CO M- 120C acts as a single channel MPT 1327 tr unked r epeater using contr ol/tr affic r ever sion when calls ar e initiated. The CO M- 120C allows a r adio unit to be sent a G T C and switch into a call mode, making basic functionality and par ametr ic measur ements possible.
Page 281: Mpt 1327/Mpt 1343 Numbering Schemes
SECTION 6 OPTIONS 6-15-8 MPT 1327/MPT 1343 NUMBERING SCHEMES All signalling over air uses MPT 1327 number ing for the RU identity ( 7 bit pr efix, 13 bit identity) . However , most RU’s use MPT 1343 number ing schemes to r educe the digits dialed to two or thr ee digits for calls within fleet.
Page 282: Radio Simulator
SECTION 6 OPTIONS 6-15-9 RADIO SIMULATOR In this mode the CO M- 120C simulates a MPT 1327 Tr unked Radio Unit. The featur es of the Radio Unit Simulator scr een ar e descr ibed in this section. 1. Pr efix This field is the MPT 1327 Pr efix of the simulated Radio Unit.
Page 283: Automatic Test Mode, Test Selection
SECTION 6 OPTIONS 6-15-10 AUTOMATIC TEST MODE, TEST SELECTION An automatic test facility that subjects a Radio Unit to a ser ies of pr edefined tests. The test selection scr een allows the user to decide which pr otocol tests ar e r equir ed. 1.
Page 284 SECTION 6 OPTIONS 9. Speech Call to RU This test attempts to set up a speech call to the Radio Unit. Tr ansmit and r eceive par ametr ic measur ements ar e then taken, subject to the cor r ect audio connections between the RU and CO M- 120C.
Page 285: Parametric Limits
SECTION 6 OPTIONS 6-15-11 PARAMETRIC LIMITS The Par ametr ic Limits Scr een for the Automated Test Mode allows pass/fail limits settings. 1. RU Type This field allows a set of limits to be given a descr iptive label of up to 19 char acter s.
Page 286 SECTION 6 OPTIONS 8. Rx SINAD Minimum per missable r eceiver SINAD, in dB. Since the CO M- 120C G EN1 is used to gener ate the test signal, dir ect audio connections ar e r equir ed to per for m this measur ement.
Page 287: Test Execution
SECTION 6 OPTIONS 6-15-12 TEST EXECUTION Dur ing test execution, the Repeater Simulator scr een is displayed. Editing of fields is not per mitted in this mode. Autotest status and user pr ompts ar e displayed in the title bar at the top of the scr een, or in pop- up windows. Note that befor e the selected tests ar e executed, a contr ol channel acquisition test is always per for med.
Page 288: Parametric Results
SECTION 6 OPTIONS 6-15-13 PARAMETRIC RESULTS The Par ametr ic Measur ements Scr een for the Automated Test Mode displays the measur ed values, together with pass/fail r esults for each measur ement based on the limits table. The result for each test is indicated as: "PASS", "FAIL" or "----" (not tested) .
Page 289: Off-Air Monitor
SECTION 6 OPTIONS 6-15-14 OFF-AIR MONITOR In this mode the CO M- 120C becomes an off- air monitor and displays the MPT 1327 messages on scr een fr om either a Radio Unit or Tr unked Repeater Unit. 1. CCH# / TCH# Displays contr ol and tr affic channel status.
Page 290 SECTION 6 OPTIONS 1. Monitor Filter Softkeys See Appendix D. 2. Radio Monitor Softkeys See Appendix D. 6- 115...
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Page 292: Appendix A - User I/O Connectors And Pin-Out Table
APPENDIX A - USER I/O CONNECTORS AND PIN-OUT TABLE TABLE OF I/O CONNECTORS CO NNECTO R NAME CO NNECTO R TYPE SIG NAL IN/O UT SIG NAL TYPE T / R " N " T Y P E I N / O U T R F , 2 0 0 W M A X S C O P E / D V M B N C...
Page 293 PIN-OUT TABLE FOR MIC/ACC CONNECTOR PIN NUMBER SIGNAL NAME SIGNAL TYPE P T T - O u t T T L P r o g r a m m a b l e O u t M i c A u d i o A u d i o D e m o d A u d i o A u d i o...
Page 294 A-3 PIN-OUT TABLE FOR GPIB CONNECTOR PIN NUMBER ASSIGNMENT PIN NUMBER ASSIGNMENT D I O 1 S R O D I O 2 A T N D I O 3 D i g i t a l G N D D I O 4 D I O 5 E O I...
Page 295 PIN-OUT TABLE FOR RS-232 CONNECTOR PIN NUMBER ASSIGNMENT 4 . 7 k Ω + 1 5 V d c T X D A T A R X D A T A N / C D i g i t a l G N D 4 .
Page 296: Appendix B Abbr Eviations
APPENDIX B - ABBREVIATIONS Amper e Digital to Analog Conver ter Alter nating Cur r ent Digital Coded Squelch Audio Fr equency Decibels A Fr eq Audio Fr equency Decibels r elative to 1 milli- watt AG C Automatic G ain Contr ol Dir ect Cur r ent Amplitude Modulation Digital Coded Squelch...
Page 297 Figur e L- lim Lower Limit Fr equency Modulation Limit Folw Follow Single Sideband Lower fr eq Fr equency Level Func Function Func G en Function G ener ator M- Fr eq Audio Fr equency Megaher tz ( 1000000 Her tz) G - Scan RF G ener ator Scan Micr ophone Sour ce...
Page 298 Recall U- lim Upper Limit Rcvr Receiver Micr osecond Recap Recaptur e Single Sideband Upper Refer ence Unit Under Test Resolution Retur n Volt Radio Fr equency Alter nating cur r ent voltage RF Pwr Lvl RF Power Level VChan Voice Channel R fr eq Receiver Fr equency...
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Page 300: Appendix C Repacking For Shipping
APPENDIX C - REPACKING FOR SHIPPING SHIPPING INFORMATION IFR Test Sets r etur ned to factor y for calibr ation, ser vice or r epair must be r epackaged and shipped subject to the following conditions: C-1-1 AUTHORIZATION Do not r etur n any pr oducts to factor y without author ization fr om IFR Customer Ser vice Depar tment.
Page 301 Close shipping container lids and seal with shipping tape or an industr ial stapler . Tie all sides • of container with br eak r esistant r ope, twine or equivalent. TOP PACKING MOLD TEST INSTRUMENT WRAPPED WITH ELASTIC POLYETHYLENE RETAINER SHEETING BOTTOM PACKING MOLD HOLD DOWN STRAP IFR SHIPPING CONTAINER 8618018 Repacking for Shipment...
Page 302: Appendix D Soft Function Keys
APPENDIX D – SOFT FUNCTION KEYS ALPHABETICAL LISTING OF COM-120C SOFT FUNCTION KEYS FUNCTION DESCRIPTION T o g g l e s b e t w e e n d B a n d % s e t t i n g s . I n a c t i v e u n i t s d i s p l a y e d o n s o f t k e y .
Page 303 FUNCTION DESCRIPTION 2 0 % S e t s D i s t o r t i o n M e t e r U p p e r R a n g e t o 2 0 % . 2 0 0 H z S e l e ct s 2 0 0 H z R a n g e .
Page 304 FUNCTION DESCRIPTION A N A L Y D i s p l a y s a b b r e v i a t e d A n a l yze r . A N T S e l e c t s A N T E N N A C o n n e ct o r a s R F i n p u t co n n e c t o r . A P P D i s p l a y s w h e n t h e r e a r e s t o r e d m a c r o f i l e s .
Page 305 FUNCTION DESCRIPTION C A L L M a ke s a G r o u p C a l l t o t h e R a d i o , A t t e m p t s t o s e t u p a S p e e c h C a l l w i t h R U si m u l a t i n g a c a l l f r o m a n o t h e r r a d i o .
Page 306 FUNCTION DESCRIPTION S e l e c t s d B f o r R e a d i n g U n i t s . T o g g l e s b e t w e e n d B a n d % s e t t i n g s. I n a ct i ve u n i t s d i sp l a ye d o n so f t ke y.
Page 307 FUNCTION DESCRIPTION E N A B L E E n a b l e s B o r d e r O f f s e t . E n a b l e s t h e s e l e ct e d t e s t . E N A B L E D E n a b l e s a u t o m a t i c t e s t c o n d i t i o n .
Page 308 FUNCTION DESCRIPTION F R E Q D i s p l a y s t h e S t o r e d R F F r e q u e n c y L i st . G E N 1 A c c e s s e s A u d i o G e n e r a t o r 1 p a r a m e t e r s .
Page 309 FUNCTION DESCRIPTION L O C K S e t s f r e q u e n c y u s e d f o r G e n e r a t e , R e ce i v e L o c k s t h e T r a c k i n g G e n e r a t o r ce n t e r a n d S p e c t r u m A n a l y z e r o p e r a t i o n t o s a m e f r e q u e n cy a t a co n s t a n t o f f se t f r o m t h e...
Page 310 FUNCTION DESCRIPTION N o r m a l S e t s S p e c t r u m A n a l y z e r t o N o r m a l s i n g l e C e n t e r F r e q u e n c y O p e r a t i o n . ( s e e , S p l i t ) N U M E R I C F o r c e s D e c o d e F u n c t i o n t o d e c o d e m e s s a g e a s s p e c i f i e d t y p e .
Page 311 FUNCTION DESCRIPTION R A M P S e l e c t s R a m p a s a c t i v e W a v e S h a p e . R A N D O M S e l e c t s R a n d o m D a t a P a t t e r n t yp e i n o p t i o n a l B E R M e t e r o p e r a t i o n .
Page 312 FUNCTION DESCRIPTION S E A R C H P e r f o r m s S I N A D s e a r c h o p e r a t i o n . S E T L V L A c c e s s e s p r o c e d u r e f o r se t t i n g r e f e r e n ce f o r m e a s u r i n g i n p u t l e ve l a t c u r r e n t f r e q u e n c y .
Page 313 FUNCTION DESCRIPTION T - R v s A c c e s s e s T r u n k i n g - R e v e r s e C h a n n e l L i s t . S e l e c t s U p p e r S i d e b a n d D e m o d u l a t i o n .
Page 314: Index
INDEX ∅ M M e t e r ( s p e c i f i c a t i o n s ) 1 - 1 7 D a t a G e n e r a t o r / B i t E r r o r R a t e M e t e r ( O p t i o n 0 7 ) 6 - 2 D a t a G e n e r a t o r O p e r a t i o n 4 - 6 7...
Page 315 G e n e r a l C h a r a c t e r i s t i c s ( s p e c i f i c a t i o n s ) 1 - 2 3 O f f - A i r M o n i t o r 6 - 1 1 4 G e n e r a l D u p l e x G e n e r a t e O p e r a t i o n...
Page 316 S a f e t y C o n d i t i o n s ( s p e c i f i c a t i o n s ) 1 - 2 3 T e s t E x e c u t i o n 6 - 1 1 2 S c r e e n s , S o f t F u n c t i o n K e y s a n d M e n u s 3 - 9...
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Page 318: Battery/Voltage/Fuse Instructions
USER REPLACEABLE BATTERY AND FUSES BATTERY/VOLTAGE/FUSE INSTRUCTIONS...
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Page 320 WARNING HIGH VOLTAGE EQUIPMENT THIS EQUIPMENT CONTAINS CERTAIN CIRCUITS AND/OR COMPONENTS OF EXTREMELY HIGH VOLTAGE POTENTIALS, CAPABLE OF CAUSING SERIOUS BODILY INJURY OR DEATH. WHEN PERFORMING ANY OF THE PROCEDURES CONTAINED IN THIS MANUAL, HEED ALL APPLICABLE SAFETY PRECAUTIONS. SAFETY FIRST: TO ALL SERVICE PERSO NNEL R E F E R A L L S E R V I C I N G O F U N I T T O Q U A L I F I E D T E C H N I C A L P E R S O N N E L .
Page 321 U S E R E C O M M E N D E D F U S E S O N L Y U s e o n l y f u s e s s p e c i f i c a l l y r e c o m m e n d e d f o r t h e e q u i p m e n t a t t h e s p e c i f i e d c u r r e n t a n d v o l t a g e r a t i n g s . W A R N I N G : T H E C O M - 1 2 0 C U S E S A S E A L E D L E A D - A C I D - B A T T E R Y P A C K .
Page 322: Power Source Requirement
Insur e pr oper fuse is installed in AC FUSE Holder . Fuses pr ovided include two 3.0 A, 250 V, Type F, 5 X 20 mm fuses for ac oper ation. ο Replace fuse and r einstall AC FUSE Holder . COM-120C AC & DC Fuse Location Page 1...
Page 323: Dc Fuse Replacement
DC FUSE REPLACEMENT ο Disconnect all exter nal power connections. ο Use a slotted tool to depr ess DC FUSE Holder ( 1) and tur n counter clockwise. ο Remove DC FUSE Holder and r emove fuse. Insur e pr oper fuse is installed in DC FUSE Holder . Fuse pr ovided: 10 A, 32 V, Type F, AG C fuse for dc oper ation.
Page 324 CAUTION: REPLACE BATTERY WITH IFR PART NUMBER 4000- 0000- 011 BATTERY O NLY. CAUTION: DO NO T USE O R CO NNECT A NO N- RECHARG EABLE BATTERY TO THE TERMINALS. DANG ER O F O VERHEAT O R FIRE.
Page 325: Battery Fuse Replacement
BATTERY FUSE REPLACEMENT The following procedure should be followed when replacing the battery fuse. ο Set CO M- 120C Main Power Switch to O FF. ο Remove all power sour ces fr om CO M- 120C. ο Loosen 4 scr ews on Batter y Access Panel. ο...
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