Motorola CDM Series Basic Service Manual page 6

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2.6.5 CDM1250, CDM1550, CDM1550•LS, and CDM1550•LS+ Control Head
Disassembly ..............................................................................................2-9
2.7 Radio Assembly ................................................................................................ 2-10
2.7.1 CDM750 Control Head ............................................................................2-10
2.7.2 CDM1250, CDM1550, CDM1550•LS, and CDM1550•LS+
Control Heads .........................................................................................2-10
2.7.3 Radio Chassis and Transceiver Board ....................................................2-10
2.7.3.1 LowBand Radio Chassis and Transceiver Board Assembly.............2-11
2.7.4 Control Head Fitting ................................................................................2-12
2.8 Radio Assembly Exploded Mechanical View and Parts List ............................. 2-13
2.9 CDM750 Radio Control Head Exploded Mechanical View and Parts List ........ 2-14
2.10 CDM1250 Radio Control Head Exploded Mechanical View and Parts List ...... 2-15
2.11 CDM1550 Radio Control Head Exploded Mechanical View and Parts List ...... 2-16
2.12 CDM1550•LS and CDM1550•LS+ Radio Control Head Exploded Mechanical View
and Parts List .................................................................................................... 2-17
2.13 Service Aids ...................................................................................................... 2-19
2.14 Test Equipment ................................................................................................. 2-20
2.15 Programming Test Cable Configuring and Wiring............................................. 2-21
Chapter 3
Transceiver Performance Testing ............................................................ 3-1
3.1 General ............................................................................................................... 3-1
3.2 Setup................................................................................................................... 3-1
3.3 RF Test Mode ..................................................................................................... 3-2
Chapter 4
Radio Programming and Tuning Procedures.......................................... 4-1
4.1 Introduction ......................................................................................................... 4-1
4.2 CPS Programming Setup.................................................................................... 4-1
4.3 Radio Tuning Setup ............................................................................................ 4-3
4.3.1 Initial Test Equipment Control Settings .....................................................4-3
4.4 Transmitter Tuning .............................................................................................. 4-4
4.4.1 Power Amplifier (PA) Bias Tuning .............................................................4-4
4.4.2 Reference Oscillator Warp ........................................................................4-5
4.4.3 DAC Tuning (LowBand radios only) ..........................................................4-6
4.4.4 Transmit Power Tuning .............................................................................4-7