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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

Rohde & Schwarz CMU200 Service Manual

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