ROHDE&SCHWARZ CMT 802.2020.52, CMT 802.2020.54 Radiocommunication Tester Operating manual

ROHDE&SCHWARZ
Measuring instruments
and Systems Division
Operating manual
RADIOCOMMUNICATION
TESTER
CMT
802.2020.52
802.2020.54
Printed in the Federal
Republic of Germany
Manuals required for the various intrument types.
| Instrument type
without oscilloscope
with oscilloscope
Manual
CMT model .52 CMT model .54 | RADIOCOMMUNICATION TESTER CMT, models .52/.54
CMT model .52 CMT model .54 | RADIOCOMMUNICATION TESTER CMT, models .52/.54 +
with option with option _
СМТ Вто CMT.S10 SSB/AF ANALYSIS CMT-B10
CMT model .53 CMT model .55 | RADIOCOMMUNICATION TESTER CMT, models .52/.54 +
2-GHZ EXTENSION
CMT model .56 CMT model .58 | RADIOCOMMUNICATION TESTER CMT, models .52/.54 +
CELLULAR RADIO SIMULATOR, NETWORK C
CMT 60 CMT 62 RADIOCOMMUNICATION TESTER CMT, models .52/.54 +
CELLULAR RADIO SIMULATOR R2000
CMT 64 CMT 66 RADIOCOMMUNICATION TESTER CMT, models .52/.54 +
CELLULAR RADIO SIMULATOR NMT 450/900 |
CMT 70 CMT 72 RADIOCOMMUNICATION TESTER CMT, models .52/.54 +
CELLULAR RADIO SIMULATOR AMPS/TACS
CMT 82 CMT 84 RADIOCOMMUNICATION TESTER CMT, models .52/.54 +
CELLULAR RADIO SIMULATOR NETWORK C
CELLULAR RADIO SIMULATOR R2000
CELLULAR RADIO SIMULATOR NMT450/900
CELLULAR RADIO SIMULATOR AMPS/TACS
Contents of CMT Manual
Operating manual
1. Data Sheet
2. Preparations and Operation
3. Maintenance
Service manual
Volume 1
4. Service Manual for Complete Instrument
5. Service Instruction for Modules
Power Pack 00 000000.0000000000000000000
Digital Unit > ет ее еее ее ФФ ФФ 808
Analog 0 1 1 о о ос ооооовоовововевевовввевово
1st Modulation Generator Module ......
RF Oscillator Module including .....
Reference Oscillator (OCXO) CMT-B1 1
Output Stage . ® 8 8 0 05 OO 0&8 OO 8 OO OO Ss sO Oe
Attenuation Set Module ....soeosocsccooco
Volume 2
5. Service Instruction for Modules
Oscilloscope Module e068 8 000000080 0s eo
Display/Keyboard Module .....
Adjacent-channel Power Meter CMT-B6 ..
2nd AF Synthesizer CMT-B7 000000000000
IEC Bus/Control Interface CM-B4 ......
Autorun Control/Printer Interf. CM-B5
RF Millivoltmeter CM-B8 0.000000000000
Duplex Modulation Meter CM-B9
DTMF Decoder CM-B11 000000000: 00.0, 06,:0, 0,08
Transfer Memory Module CM-21
Ф Фе + Ф wm tE
Order No.
802.2814.02
802.4517.02
802.8435.02
802.5713.02
802.8835.02
803.8916.02
802.7616.02
802.4223.02
803. 1111.00
802.3662.00
803. 7810.02
803.2618.02
803. 3914.02
803.3314.02
803.6813.02
803.5317.02
803. 4610.02
803.7510.02
Index
JA UN PUNA
CWO 4 OA WN -—
..... |
Table of Contents
1 Data Sheet
2 Preparations and Operation ....ooseocoocsocsooocooo
| Switching-On ee 0 OB BOS SE OEE SS POE NE TES SOE 89,20. 06,28 8 ." ..
Mains Operation . _» | 9 2 0 OO OO OPO OE OES E SEE EP SOO SE ото TS . .
Battery Operat ion . * 6 & 0 © 5 0 0 8S OOO SPE TO OE OO SO EDS . . .a.
N NN
® . e
— — —
. a
N) —
Explanation of the Controls .....seoecocooocoooooooo
Front panel 6e 6 & & 9 ¢ OF OO OO 6 OO SE a 6998 ec... ве
Rear Panel в ее © т ев от ет 5 6 8 ® & $ Y & 4 0 0 OO 8 PE ESS ee PE ee ее
V NN
a . .
NNN
. .
№) =>
Manual Operation ....oeseoeoccscscoccocoococooocoaooaoooo
General Operating Notes ....oooceocoscoococooooooooooo
‚1 Switch-on Status, Permanent Memory and
Master Reset ...qoscecscscsocococscorvoooooasorsceÑoonoroooo
Transmitter Test / Receiver Test ................
General Syntax Rules for Entries ...eococsoocoooo
Variation of Setting Values ....oocscocccocccooooooo
Representation of the Measured Values/
Setting Values in the Displays ....ooecsocscoccooccoo
NV N NN N NN
. . e e е ее
WW WW Ww WW
e . e à Фе
— ml
—_— amd mb
о ее e. e
New
Connection Between CMT and Device Under Test ....
Frequencies....sscescccocoosccscocooacaocoeoaocoaoooaoo
RF Meter 0000000.0.0.0.0.0.0.0. 0.0.0.0. 0.0.0. 0.0. 0.0.0.0.00 00.0. 00000000
Operating Frequency in the Transmitter Test Mode
Operating Frequency in the Receiver Test Mode ...
Operation Without Duplex Modulation Meter
(Option CM-B9) 000000000000 0000 0000000000600000000
AF Meter EEE
AF Generator Settings 0000000000000000 00000000000
CODE/DECODE 00000000 00000000000000000000 000000008
Selection of a Particular Code ...ceeeccecceccccocoes
CODE Transmission ....seescsssccooccocooosaacorooreo
CODE Reception ....eceeosorcorooocoocoacococooooooo
Automatic Repeat ....ooscocossscococcooscorcooaocoÑooo
Frequency Tables of the Fixed Tone-sequence
Standards ...eosessrocoocoocecccoccosoooooooooooooe
Programming the User Codes USER 0 to USER 2 .....
Measurements on Transceivers with |
Acknowledgement Call 00 00 000000000000 000000000008
`
. e. e ©
> WN —
e * e e + .» e. e
Ww Ww ww ww ww ww “WW WWW
. т +. ©
WW U U LI WWW WW WW “WWW WWW N
e 0 e + ве ео
e e e e o
N N VV NNNNNN NV NVNNNN
. =) EEE
. ©
Ww Ww
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1 a UI > 3 IN -—a
ann AAA A = my a.
Page
N N N
. . a
N — —
2.47
2.51
2.51
2.51
2.52
2.53
2.54
2.55
2.58
2.59
2.60
2.63
2.68
2.69
2.69
2.74
RF Power / RF Level
RF Power Measurements
RF Synthesizer Output Level ....oocsscccascoconoo
Probe Measurements
Adjacent-Channel Power Measurements (ACP) .....
Selective RF Millivoltmeter
General Information .cceccecceccccececcccsccccses
Calibration through Entry of Currently
Applied POwer 0000000000 000000000000 00000000000
Calibration through Reference Measurement
Using the RF Power Meter 000000000 0000000000000
Calibration Sources
Error Handling 0000000000000 000000000000 0000000
Application Hint: Measurement of Forward and
Reflected POWEY 000000000000 000000000000 0000000
o> > > > > > ES >
UT UT UI Ul a UN —
.
.
Ww N) —
Www Ww WWWwwwwww
N NN N NV NN NNNNN
> >
e . e
nun
. e. $
O UT >
Demodulation/Modulation ....essccccssccoococooo
Modulation Selection
Modulation Meter 0000000000000 000. 0000000200000
Transmitter Distortion
Filter Weighting of the Demodulated Signal ....
Modulation of the RF Test Generator
Calibration of the Modulation Sensitivity of
the External Input 00000000000 0000000000 0000000
~J] NUT W N —
2.75
2.75
2.76
2.77
2.78
2.79
2.79
2.80
2.81
2.82
2.82
2.83
2.84
2.84
2.86
2.87
2.87
2.88
2.91
Modulation Sensitivity ec...
Modulation Generator Level / AF Voltmeter .....
AF Generator Level
AF Voltmeter 000000000 0000 0000000000 00000000008
Receiver Distortion Depth (SINAD/DIST)
Signal-to-Noise MeasurementS 000000000 000000000
Filter Weighting of the AF Signal 0000000000000
Averaging of Noisy Signals at AF VOLTM Input
and Demodulator Input 0000000000000 0 00000000008
NNNNNNN N ND NN NV NNN
Www ww www Ww Ww ww ww ww
ON ON ON ONO ON UT VI UI UI UT UT UT UN
ON UT > QU N —
Numeric Keypad + Special Functions .0.0.0.0.00000000
Numeric Keypad .„... .. г оо ооооововововововевовове
AVAR „оо ооооосовооввовввеововвввовововевевввовевевовео
RANGE HOLD „о о со ооооовоооввововевоввовевоввсвовое
@ DISPL SELECT 000000000000 0000000000 000000 0000
ANALOG SELECT 0000000000000 000 00000000000000000
STORE/RECALL 000000000 0000000000000 000000000000
Storing Complete Instrument Settings .........
Storing RF Fregquencies 00000000000000000 0000000
Squelch Measurement 0.0.0.000000000 00 0000000000000
Bandwidth Measurement ..0.0000000000 0000000000000
Quieting Measurement 000000000000 0000000000 0000
Aborting Search Routines 0.0.000000000000000000 2
Selftest
. .
N). —
2 № К) №) Ю) К) К) Ю Ю юЮ Ю К) Ю К) о
. . . + . . . . . . © ® . . .
(с) Www www www wwwwwyWwow
. ® . ® a a Bb 8 8 . . e . . .
. . * . . . * . . a . . . .
2 —- O 0 YOU WN >
NV — ©
2.92
2.92
2.93
2.94
2.95
2.96
2.96
2.97
2.97
2.99
2.101
2.104
2.105
2.106
2.108
2.108
2.109
^^ № К N
al —Á — ей o
1
1
1
— .— ord wd CO
1
1
2.3.10
2.3.10.1
2.3.10.2
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O U1 UI UI UT UT > > > bf > Ww Www
. “ . Ls .
® . . . ®
vb mb cmd ad ed
> . . . °
WwW Www ww Www ww (VS Ww Www
O © © © © © => И <» И <» И «» В <») © © OOO COO O
N V NNNN DV NN NN N N V NN VD N NN
.
=
2.3.10.7
2.112
2.112
SPEC Function
General Instrument Functions
Control Functions for the Option Autorun
Control (A...SPEC)
Control Functions for the Option IEC Bus
CM-B4 (B...SPEC)
Control Functions for Frequency Counter
and CODE (DECODE) (C...SPEC)
Control Functions to Call Calibration Routines
and the Self-test (D...SPEC) 2.125
Display of the Options Fitted .....0.0.0000000000 2.127
0000 00000000000000000000002.,.116.1
2.119
2.120
Oscilloscope ® & 8 O. 5% OO 0S GO OE GEO EO OSS TEP ESE OE OE SE 2.128
Autorun Control » ® 5 & & 8 6 0 a 086 HBOS EG SG "SS OSG OES SO e 2.130
Control Modes of the CMT with Autorun
Control ® & & 6 0 0 © 0 0 O° O00 SE OPO OE SOE OEE EOS SOOO SEEDS 2.130
Memory Allocation and Configuration of a
Control Program ® 6 6 6 & 5 6&8 OO BS OO OO DO SEO OB OO OSD 2.131
Generating a Control Program ................. 2.132
Program Call/Program Termination ............. 2.132
Storing the Commands ....ecsecsccscccocooccoocoooo 2.132
Selection of Program Lines/
Checking the Commands .o.0.0..0.0000000000000000000 2.133
Insertion of Commands 2.134
Deletion of Commands and Command Blocks ...... 2.134
Representation of the Commands in the
a Display 000000000000000000000000000000000000 2.135
Program Example ...essccococescosocsoceocococoooo 2.136
Special Functions in Conjunction with
Autorun Control
Measurement Tolerances
STOP Function 000000000000 0000000000 0000000008
Conditional Program Continuation .0......0000.000 2.139
Programming of Messages ................... 2.140
Repetition of Program BlOCKS ...............…. 2.144
2.137
2.137
Execution of a Control Program ...eseorecccsooo 2.145
Starting a Program 0000000000000 00000000000000 2.146
Program Interrupt 2.145
End of Program 2.145
Special Features During Program Run .......... 2.146
Deletion of Programs/
Initialization of Autorun Control 2.147
List of Commands of Autorun Control .......... 2.148
2.138.1
2.3.10.8
2.3.10.8.1
2.3.10.8.2
2.3.10.8.3
2.3.10.8.4
2.3.10.8.5
2.3.10.9
2.3.10.9.1
2.3.10.9.2
2.3.10.9.3
2.3.10.9.4
2.3.10.9.5
2.3.10.9.6
2.3.10.9.7
2.3.10.10
2.4
2.4.1
2.4.2
2.4.2.1
2.4.3
2.4.3.1
2.4.4
2.4.5
2.4.5.1
2.4.6
2.4.6.1
2.4.6.2
2.4.6.3
2.4.6.4
2.5
2.5.1
2.5.2
2.5.3
2.5.4
2.5.5
2.5.6
2.5.7
2.5.8
Printing of Test Logs / Program Listings ..... 2.150
Facilities and Control of Printer Function
2.150
Program Listings 0, 09, 000 000 0 0 00 6B 6 sO es OO Oe INE 2.152
Test Logs
2.152
Error Handling 6 E 9 6 © & © SOHO PHOS OH SO OS OOS ee ODES SOD 2.159
Printer Interface
Operation of Transfer Memory 0000000000000 0008
Size of Transfer Memory Space
Initialization of Transfer Memory ...esscccocoo
Copying a Program from the CMT to the
Transfer Memory ® ее еее ее еее Фе + # ® ®@ © © # # еее da 0 048
Copying a Program from the Transfer Memory
to the CMT ® 85 & & & 6 E | | OOO OO OO SS HOES SSE DEES OEE EDS
Appending a Transfer Memory Program to a
CMT Program + 6 & 8 & #+ 8+ ее ё P&S BH BBS" ELE ®@ ®* + # © | + её 5998
Deletion of a Transfer Memory Program ......so.o
Display Directory of Transfer Memory ...e.eoon.o
Control Instructions (Brief Summary)
IEC-bus Control
Introduction
General Commmand Entry
Entry of Numbers 007, 0 6 5 0 #9 O&O Oe BOO OO Oe OPE DENSE 4
Device-specific IEC-bus Commands
Special Features of the CMT in Remote Mode .
Readout of Decoded Selective Call via
IEC Bus / Autorun Control ....scsoscoccocococo
PK HOLD Function via IEC Bus and
Autorun Control
Automatic Background Calibration of the CMT
Waiting Times and Transient of the CMT
in IEC-bus Programs 000000000000 000000000000
IEC-bus Commands of the CMT 0000000000 00000008
Examples for IEC-bus Operation ....escccoccooo
Device-independent Commands 000000000000 000008
Service Request and Status Registers .........
2.159
2.160
2.160
2.160
2.161
2.163
2.164
2.165
2.166
2.167
2.170
2.170
2.173
2.175
2.175
2.178
2.186
2.189
2.190
2.193.1
2.193.1
2.193.2
2. 193.3
2. 193.4
Installation of Options т еее ФФ + 5 ¢ 5 60 0S SSO Sse 0 © 2.194
IEC Bus and/or Autorun Control (CM-B4/CM-B5)
OCXO Reference Oscillator (CMT-B1)
Adjacent-channel Power Meter (CMT-B6)
2nd AF Synthesizer (CMT-B7)
RF Millivoltmeter (CM-B8)
Duplex Modulation Meter (CM-B9)
DTMF Decoder (CM-B11)
+ + 9 & 9% ет ет ее
+ т ФФ ® 4 * +
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Ф о ocacoo oa о arc o т о о о
ее т 6 | # те еее ее
. 2.194
2.194
2.194
2.195
2.195
2.195
2.196
Testing the Fitted Options ....socoescocoooccco 2.196
Table of Contents
Page
3 Maintenance .........……ws00 000000000000 0 su 0000 3.1
3,1 Measuring Instruments and Aids Required ........ 3.1
3.2 Testing the Rated Specifications ....... ........ 3.5
3.2.1 Display, Keyboard and Spin Wheel ............... 3.5
3.2.2 Reference Frequency ...... nsc 0 000000000000 3.5
3.2.3 Frequency Setting and Accuracy ....... esococroro 3.6
3.2.4 Setting Errors and Frequency Response of the
КР Output LEVEL 0000000000000 0000. 00008 .......... 3.7
3.2.5 RE Divider ..esescscooooooo 00000 00000000000 ..... 3.8
3.2.6 Fine Level Setting .....e.”o 0.000000 000000 3.9
3.2.7 Harmonics Ratio ...ooooeoosrsocooocosoecoooooccoro 3.10
3.2.8 Non-harmonics Ratio 000000000000 00000000 0000008 3.11
3.2.9 Spurious FM .e.ceooococoaoco, . 000.0. 0.0.0.0.0. 0.0.0000 00000 3.12
3.2.10 Spurious AM ......... e ncorocooreacseooococaoaro e ono 3.13
3.2.11 FM Modulation 00000000000 000008 . 00 000 00.0.0.0.0.0 0.00 3.14
3.2.11.1 Internal FM 00000000000.00.0.0.8. 0 0.0.0.0. 00 000000000008 3.14
3.2.11.1.1 RF Frequency Response of the Modulation
Deviation ....s.oscooo ........ e ococorooo ........ 3.14
3.2.11.1.2 AF Frequency Response of the Modulation
Deviation ...eococscscscccccocooooroococoooooooo.. 3.15
3.2.11.1.3 FM Errors ....... escocoo e orcoocsacancaos ........ 3.16
3.2.11.1.4 FM Distortion ....eoeecoseccoccccoo .............. 3.17
3.2.11.2 External FM ..... e sccccocooocoaoo e occccoocoocooos 3.18
3.2.11.2.1 External Modulation with Standard Level ....... 3.18
3.2.11.2.2 External Modulation with Calibration .......... 3.19
3.2.11.3 Multitone Modulation ...ccececceces .e........... 3.20
3.2.12 AM Modulation ....... ...... . 000000000000 00 ..... 3.22
3.2.12.1 Internal AM .ñwewooeccoccssocrsosoococorcococoaoooee 3.22
3.2.12.1.1 Frequency Response of the Modulation Depth .... 3.22
3.2.12.1.2 AM Error ...essosceoocsoocooooooo 000000000000 .... 3.23
3.2.12.1.3 AM Distortion 00000000000000000 0000000000 .e...[.. 3.24
3.2.12.2 External АМ ......... e ssotrecoaoncacocaracanoacaneo 3.25
3.2.12.2.1 Calibration with Multitone Modulation ......... 3.25
3.2.13 Phase Modulation 000000000000000000000000000008 3.26
3.2.14 Response Threshold of the Automatic
Receiver/Transmitter Setting ....oeocce.oococcooo 3.27
3.2.15 Modulation Generator „............ 000000000008 3.28
3.2.15.1 Frequency Setting and Accuracy ...ooocescooccoeco 3.28
3.2.15.2 Distortion of the Modulation Generator ........ 3.29
3.2.15.3 Output Voltage of the Modulation Generator .... 3.30
3.2.15.3.1 Frequency Response of the Modulation Generator 3.30
3.2.15.4 Frequency Setting and Accuracy of the
2nd AF Synthesizer (Option CMT-B7) ............ 3.31
3.2.16 AF Voltmeter 00000000000 00000000 00000000 ....... 3.32
3.2.16.1 AF Frequency Response 000000000000 00.000000 00000 3.32
3.2.16.2 Measuring Accuracy Depending on the Input Level 3.32
3.2.16.3 Frequency Response of the CCITT Filter ........ 3.33
3.2.17 Distortion Meter 0000000000000 0000000000 ....... 3.35
3.2.17.1 Inherent Distortion ....eooesccccccocoroococoos 3.36
3.2.17.2 Display Accuracy of the Distortion Meter ...... 3.36
3.2.18 SINAD Meter 0.0.0.000.000000 00.0000 ....... .e......... 3. 3 7
3.2.19 AF Counter ............ e oscoacoarcarearccaoosao ooo 3.38
3.2.20
3.2.20.1
3.2.20.2
3.2.20.3
3.2.21
3.2.21.1
3.2.22
3.2.22.1
3.2.22.2
3.2.23
3.2.24
3.2.24.1
3.2.25
3.2.25.1
3.2.25.2
3.2.25.3
3.2.25. 4
3.2.26
3.2.27
3.2.28
3.2.29
3.2.29.1
3.2.29.2
3.2.29.3
3.2.29.4
3.2.30
3.2.30.1
3.2.30.2
3.2.31
3.2.31.1
3.2.31.2
3.2.31.3
3.3
3.4
3.4.1
3.4.2
3.5
® % т e >» & 8 SV Y SHE т «| SO) kt E © # # % © E # © © PT 2 E "ECO
RF Counter
Counter Sensitivity at Connector RF IN/OUT 77
Counter Sensitivity at Connector INPUT2 79
Counter Accuracy
ФФ те e 6 т | т E т $ + E E E E SS « ES SO E |! Exa Sd E =2Erx"- 66€ >= EDN
VSWR of the
Frequency Deviation Meter
300-Hz Highpass Filter
Residual FM of the Deviation Meter
Phase Deviation Meter
Modulation Depth Meter
Residual Modulation of the AM Meter
Oscilloscope (CMT Model 54,
Frequency Response at Connector EXT
Measurement Dynamic Range at Input EXT
Oscilloscope Time Base
Representation of Internal Signals
DTMF Decoder (Option CM-B11)
Adjacent-channel Power Meter (Option CMT-B6)
RF Millivoltmeter (Option CM-B8)
Autorun Control/Printer Interface
(Option CM-B5)
Memory Function .
Printer Function
Relay Functions ....e.seococoo
Battery
Transfer Memory (Accessory CM-21)
Memory Function
Battery
& + 6 & 4 & +6 % & 6 #6 4 % 9
ее вече +
+. «+ «+ # & ® # 85 @ O ф «4 © «# vss 08 0
e & . © 5 8 & »
ее © ® # @ HO #@ ® 4 ®@ + + © OP 4 es Pe ese OC" asa
© + | e @ A o? _ so
e 2 2 2 € 9 E 6 0 5" 6 BB Se OB POPS Se LSE SEWN
IEC Bus (Option CM-B4)
Listener Function
Talker Function
Relay Functions
Performance Test Report
Maintenance
Electrical Maintenance
Mechanical Maintenance
Storage
Page
3.39
3.39
3.40
3.41
3.42
3.43
3.44
3.45
3.46
3.46
3.47
3.47
3.48
3.48
3.49
3.50
3.50
3.51
3.52
3.54
3.56
3.56
3.58
3.58
3.59
3.60
3.60
3.60
3.61
3.61
3.61
3.62
&
ROHDE&SCHWARZ
EC Certificate of Conformity
Certificate No.: 9502175
This is to certify that:
Equipment type Order No. Designation
CMT52 0802.2020.52 Radiocommunication Tester
CMT54 0802.2020.54 "
complies with the provisions of the Directive of the Council of the European Union on the
approximation of the laws of the Member States
- relating to electrical equipment for use within defined voltage limits
(73/23/EEC revised by 93/68/EEC)
- relating to electromagnetic compatibility
(89/336/EEC revised by 91/263/EEC, 92/31/EEC)
Conformity is proven by compliance with the following standards:
EN61010-1 : 1991
EN50081-1 : 1992
EN50082-1 : 1992
Affixing the EC conformity mark as from 1995
ROHDE & SCHWARZ GmbH & Co. KG
Mühldorfstr. 15, D-81671 München
Munich, 30.11.95 Central Quality Management FS-QZ / Becker
2 Preparations and Operation
The values specified in this section are not guaranteed; only the
technical data on the data sheet are binding.
A Section 2.1 "Switching-On" must be referred to before
applying an operating voltage.
2.1 Switching—On
The radio test assembly CMT can be powered from the mains or from
a battery.
The instrument is immediately set to standby mode when an opera-
ting voltage is apolied. This has the advantage that the frequen-
cy accuracy and constancy of the reference crystal is unaffected
by frequent switching on and off.
The CMT is switched on and off by pressing the STANDBY key.
2.1.1 Mains Operation
Before connecting the power supply, ensure that the in-
A strument is set to the correct operating voltage and
that the correct fuse is fitted.
To change the value: set in the factory, set the re-
quired voltage on selector 117 and replace the mains
fuse 118.
The CMT can be connected to any power supply with a protective
earth and a voltage of 100 V, 120 V, 220 V oder 240 V (rated va-
lue +10 %) at 50 to 440 Hz. The power consumption is approx. 100
VA in the basic design. |
Fuses required: 100 V/120 V T4
220 V/240 V T2
Certain parts of the instrument are in operation even
A in standby mode (temperature-controlled oscillator, op-
tion CMT-B1). Complete shut-down is obtained by isola-
ting from the power supply.
Battery Operation
Battery mode is automatically selected if a voltage >11 V (with
simultaneous AC supply operation >24 V) is applied to terminals
100.
The permissible voltage range is 11 to 30 V with a maximum cur-
rent consumption of 16 A.
The battery input is protected against incorrect polarity and has
a 16 A slow-blow fuse. |
A
The CMT draws a small residual current from the battery
even in standby mode (required for the reference
crystal). In order to prevent battery discharge over a
longer period, it is recommendable to disconnect the
CMT from the battery.
2.2 Explanation of the Controls
2.2.1 Front Panel |
(See Figs. 2-1 to 2-9 in the Appendix)
The front panel is divided into fields of different colours to
facilitate operation of the instrument. The individual controls
are described below in accordance with this division.
In addition to an item number, an unequivocal label is assigned
to each control.
Item Label Designation and function
Fig. 2-1 Frequency field:
RF > To set and measure all used
FREQUENCY frequencies.
AF |
> Alphanumeric display for various
applications (code, alternative dis-
play, instrument messages).
1 Frequency display:
10-digit, for display of measured or
set RF values.
ln
a display:
14-digit, alphanumeric display for
measured or set AF frequencies and
selective call; additional display
for instrument messages or for
measured/setting values from other
fields.
Key acknowledgement:
lu
Appears above each key as long as the
respective function is switched on.
Item
Label
Designation and function
| >
Red LED (transmitter test)
Green LED (receiver test)
The functions labelled in red are
assigned to the keys if the red LED
lights up.
The functions labelled in green are
assigned to the keys if the green LED
lights up.
Functions labelled in black are valid
for transmitter and receiver tests.
lu
COUNT £
Le
f
COUNT Е: (transmitter test)
Switch on built-in RF counter,
Output in the frequency display.
Following each frequency count in
transmitter test mode, the operating
frequency is automatically set to the
corresponding value.
SET Е ВХ: (receiver test)
Set output frequency of RF test trans-
mitter to fixed value.
Output in the frequency display.
lo
£ SET
SET £ TX: (transmitter test)
Transmitter test operating frequency
set to fixed values.
Output in the frequency display.
Af: (receiver test)
Setting of channel spacing
(important with ACP measurement).
Output in the a display.
Item
Label
Designation and function
Is
DECODE
L
CODE
DECODE: (transmitter test)
Switch on tone sequence evaluation
circuit. The contents of a received
data message are output in the
a display. |
CODE: (receiver test)
Transmit data message to device under
test. The contents of the transmitted
message are output in the a display.
loo
DEMOD + BEAT
Г
AF EXT
DEMOD- BEAT: (transmitter test)
The demodulated AF is measured if this
key is pressed once ("DEMOD" is output
in front of the measured value in the
a display as an identification).
The BEAT measurement (counting of
difference between operating and input
frequencies of the CMT) can be called
by pressing the key again, provided
function SET £ TX is active ("BEAT" and
measured value in the a display).
Switch off BEAT function by pressing
the same key again or by pressing a key
in the modulation field (Fig. 2-3).
AF EXT: (receiver test)
Measure frequency at input AF VOLTM. 84.
Output in the a display.
lo
AF INT
AF INT 1: (transmitter/
receiver test)
Set modulation generator frequency 1.
Output in the a display.
Item Label Designation and function
10 AF INT AF INT 2: (transmitter/
Г receiver test)
2 Set modulation generator frequency 2
(only with option CMT-B7 fitted).
Output in the a display.
Item
Label
Designation and function
RE POWER
RE LEVEL
RF level field:
For setting and measurement of
used RF levels such as:
+ RF output level of test generator
+ RF output power of transceiver
+ Results of RF millivoltmeter
+ Adjacent-channel power ratio
(option CMT-B6)
RF level display:
3 1/2-digit, for display of RF level
in W, dBm, V and dByV.
Analog display
Quasi-analog output of the RF level
display of measured values (see Section
2.3.7.5 for deviations).
POWER
Vo
POWER: (transmitter test)
Call RF power measurement.
Output in the RF level display.
Vo SYNTH.: (receiver test)
This key can be used to adjust the
output level of the RF generator in
the CMT.
Output in the RF level display.
The analog display indicates the levels
at which the RF attenuation set switches
(with short interruption in output
signal).
|
Item
Label
Designation and function
ACP
+6 dB
ACP: (transmitter test)
Call adjacent-channel power measurement.
The ratio of the interfering noise in the
upper or lower and 1st or 2nd adjacent
channels is measured (option CMT-B6).
The selective RF millivoltmeter is
switched on via | 0 || АСР |.
Output in the RF level display.
Vo SYNTH. +6 dB: (receiver test)
The level of the RF generator is in-
creased by 6 dB when this Key is pressed.
The original value is set again by
pressing the key again.
Key selection indicated by bar.
Vo OFF
Vo OFF
Vg OFF:
The RF synthesizer can be switched off
using this key in both the transmitter
and receiver tests.
Key selection indicated by bar.
PROBE
1
PROBE
PROBE:
Call RF level measurement with milli-
voltmeter (option CM-B8).
Output in the RF level display.
Item Label
Designation and function
DEMODULATION
MODULATION
Modulation field:
The transmitter modulation analysis
(transmitter test, DEMOD function) and
the test generator modulation setting
(receiver test, MOD function) are com-
bined here. The CMT mode determines the
unit displayed in this field, where $
stands for AM, kHz or Hz for FM and
rad for ФМ.
Modulation display:
3 1/2-digit, for display of the modula-
tion depth in %, kHz, Hz or rad, |
or the modulation distortion in % (dB).
Analog display
Quasi-analog output of the results in
the modulation display (see Section
2.3.7.5 for deviations).
23 MAX PK
Ce
INT 1
MAX PK: (transmitter test)
Call modulation measurement.
The maximum value is output in the
modulation display. By entering a unit,
the test set modulation (AM, FM, ?М)
is determined in both the transmitter
and receiver tests.
Output in the modulation display.
INT 1: (receiver test)
The modulation depth of the RF gene-
rator can be displayed and modified
via the built-in first AF generator
using this key. Additional entry of a
unit determines the test set modulation
(AM, FM, ?M) both in the transmitter
and receiver tests.
Output in the modulation display.
Item Label Designation and function
24 + 1/2 - POLARITY SELECT: (transmitter test)
LJ Call modulation measurement.
INT 2 The positive or negative peak can be
specifically evaluated by pressing the
key (several times if necessary), or the
mean peak modulation can be evaluated.
Sequence: Г” + + +/2 + - >
+
Ап entered unit is ignored since this is
only determined by MAX PK or INT 1.
Output in the modulation display.
INT 2: (receiver test)
The modulation of the test generator
can be displayed and modified via the
second AF generator (option CMT-B7)
using this key.
Two-tone modulation is only possible
with INT 1, i.e. the unit and thus the
type of modulation is determined by
INT |.
Output in the modulation display.
Item
Label
Designation and function
PK HOLD
L
EXT
PK HOLD: (transmitter test)
This function is used to detect the
maximum of short modulation peaks and
can be switched on and off using this
key.
Key selection indicated by bar.
EXT: (receiver test)
This key can be used to modulate the
test generator with a signal applied to
the MOD EXT jack. AM + FM/ MM is possible
in addition to two-tone and double
modulation.
The type of modulation is determined
for INT 1 and INT 2 by the unit of INT 1
and MAX PK respectively, for EXT by
the entered unit.
Output in the modulation display.
DIST
OFF
DIST: | (transmitter test)
Measurement of the transmitter
modulation distortion is called using
the DIST key. The display is in % or dB
(selectable via unit).
Output in the modulation display.
MOD OFF: (receiver test)
Used to switch off the test transmitter
modulation.
Key selection indicated by bar.
Item Label Designation and function
27 HP HP: (transmitter test)
[| A 300 Hz highpass filter is connected
1 Vrms in series with the demodulators using
this key (e.g. to suppress pilot tones).
Key selection indicated by bar.
1 Vrms: (receiver test)
After pressing this key, the displayed
EXT modulation corresponds to a
reference level of Vymg at connector >
MOD EXT 82.
Key selection indicated by bar.
28 | CCITT CCITT TX: (transmitter test)
Г} A weighting filter to CCITT guidelines
EXT CAL is switched into the demodulation branch
using this key. Interaction with the
CCITT RX function results.
Key selection indicated by bar.
EXT CAL: (receiver test)
The AF voltage at input MOD EXT is
measured by pressing the key EXT CAL
and an internal calibration is carried
out if it is different from the
reference level 1 VrMms.
Key selection indicated by bar.
Item
Label
Designation and function
MODULATION GEN
AF VOLTMETER
AF level field:
The analysis of the AF signal applied
to connector AF VOLTM and the setting
of the modulation generator level at
connector MOD GEN are combined here.
AF level display:
3 1/2-digit, for output of modulation
generator output level or AF input
level / SINAD / DIST / S/N.
Analog display:
Quasi-analog representation of the
results in the AF level display (see
Section 2.3.7.5 for deviations).
Vo
A
LEVEL
Vo MOD GEN: (transmitter test)
Adjustment and display of output level
at connector MOD GEN.
If the 2nd modulation generator option
is fitted, a double tone can be
generated at connector MOD GEN using
a SPEC function.
Output in the AF level display.
AF-LEVEL: (receiver test)
Call AF level measurement at connector
AF VOLTM.
Output in the AF level display.
Item
Label
Designation and function
+20 dB
L |
SINAD-DIST
Vo MOD +20 dB: (transmitter test)
The level at connector MOD GEN can be
increased by a factor of 10. The factor
is cancelled by pressing the key again.
Key selection indicated by bar.
SINAD-DIST: (receiver test)
In order to measure the receiver SINAD
value with a defined test generator
level, it is sufficient to simply press
the SINAD-DIST key once.
The receiver distortion is displayed if
this key is pressed again.
If a number is entered before the
SINAD-DIST key is pressed (unit dB),
the test generator output level is
changed untii the SINAD result reaches
the set value.
If the unit for the numeric input is %,
the DIST measurement is called instead
of the SINAD measurement.
Output in the AF level display.
S/N
S/N: (receiver test)
The signal-to-noise ratio is called.
If a number is entered before the S/N
key is pressed (unit dB), the test
generator output level is changed until
the S/N result reaches the set value.
Output in the AF level display.
Item Label Designation and function
35 Vo OFF Vo OFF: (transmitter/
Г) receiver test)
Vo OFF Switch-off of modulation generator.
Key selection indicated by bar.
36 CCITT RX: (receiver test)
CCITT
A weighting filter to CCITT guidelines
located before the AF voltmeter is
switched on or off using this key.
The function alternates with the CCIFF
TX function.
Key selection indicated by bar.
Item
Label
Designation and function
Numeric field:
Numeric keypad to enter any numbers
(up to 25 digits).
Numbers 0 to 9 for all inputs
Minus sign:
(A number is always positive if the
minus sign is not entered)
Input of tone sequences:
* With code DTMF
E With all other codes
Decimal point:
Input of tone sequences:
+ With code DTMF
F With all other codes
MHZ mV %
L
A
Dimension key:
Frequency MHz
Level mv
Modulation % (АМ)
Distortion %
Code A
kHz НУ М
[]
B
Dimension key:
Frequency kHz
Level uv
Modulation kHz (FM)
Power W
Code B