Motorola MT2000 manual Frequency

SERVICE MTSX RSS

4.2.1.3 TRANSMIT DEVIATION BALANCE (COMPENSATION) ALIGNMENT

F2

F4

RSS LOCATION:

At the SERVICE MENU, press

.

MOTOROLA Radio Service Software

Use UP/DOWN Arrows To Adjust Softpot.

MTSX

Model:

...TRANSMIT DEVIATION BALANCE (COMPENS)

TRANSMIT DEVIATION BALANCE (COMPENSATION)

Current

Frequency

Value

New Softpot Value

806.0125

30

30

815.0125

30

30

824.9875

30

30

851.0125

45

45

860.0125

45

45

869.9875

45

45

Transmitter ..............Off

0

63

Min

Max

F1

F2

F3

F4

F5

F6

F7

F8

F9

F10

HELP

TOGGLE

PROGRAM

EXIT

PTT

VALUE

Refer to your radio service manual for the balanced attenuator alignment (compensation) procedure. This procedure should only be attempted by qualified service personnel.

Compensation alignment is critical to the operation of signalling schemes that have very low frequency components (that is, DPL) and could result in distorted waveforms if improperly adjusted.

Balanced attenuator alignment balances the modulation sensitivity of the VCO and reference modulation (synthesizer low-frequency port) lines. It is a way of correcting for deviation sensitivity versus RF frequency variations in the VCO. The transmit and receive bands are divided into frequency zones with a calibration point (value) in each zone. Balanced attenuator alignment is required after replacing (or servicing) the controller board or the RF board. Using the up/down arrow keys, adjust compensations per your radio service manual.

Performing this procedure automatically calculates compensation alignment.

The programming procedure, function key descriptions, and field definition are on the following page.

4-8 68P81074C50