Contents CMU
1100.4903.82 4 E-4
RX Power Meter (Wideband)................................................................................................. 1.13
RX Harmonics ....................................................................................................................... 1.13
RX Spurious Response / Image Rejection ............................................................................ 1.14
RX SSB Phase Noise ............................................................................................................ 1.14
RX Residual FM/AM .............................................................................................................. 1.15
RX Dynamic/ Average Noise Level........................................................................................ 1.15
Options for CMU200..............................................................................................................1.16
TX GSM Modulation.................................................................................................... 1.16
RX GSM Dem odulation....................................................................................... 1.16
Function Test with Mobile Stations (CMU200) ...................................................................... 1.17
GSM mobile test.......................................................................................................... 1.17
CDMA mobile test .......................................................................................................1.17
IS136-mobile test ........................................................................................................ 1.17
AMPS-mobile test........................................................................................................ 1.17
Test Report..................................................................................................................................... 1.18
2 Adjustment...........................................................................................................2.1
Manual Adjustment.......................................................................................................................... 2.1
Measuring Instruments and Auxiliary Equipment .................................................................... 2.1
Preparing the Instrument......................................................................................................... 2.2
Adjusting the + 5 VDC Reference Voltage .............................................................................. 2.2
Adjusting the 10 MHz Reference Frequency........................................................................... 2.3
TCXO 2.3
OCXO REFERENCE OSC. CMU-B11.......................................................................... 2.3
OCXO REFERENCE OSC. CMU-B12.......................................................................... 2.3
Automatic Adjustment of Module Data.......................................................................................... 2.4
Preparing the adjustment ........................................................................................................2.4
Performing the adjustment ...................................................................................................... 2.4
3 Repair ................................................................................................................... 3.1
Instrument Design and Function Description............................................................................... 3.1
Block diagram.......................................................................................................................... 3.2
Instrument Frame .................................................................................................................... 3.3
Rear of Instrument Frame ....................................................................................................... 3.3
Front of Instrument Frame.......................................................................................................3.3
Cooling the Instrument ............................................................................................................ 3.4
FRONT MODULE....................................................................................................................3.5
POWER SUPPLY....................................................................................................................3.6
MOTHERBOARD .................................................................................................................... 3.7
REFERENCE BOARD............................................................................................................. 3.8
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