43
Transmit Power
Alignment
From the MAIN MENU, press F2 twice and then F3 to access the
TRANSMIT POWER ALIGNMENT screen.
Transmit Power Alignment is required after replacing (or servicing) the RF
Board. This alignment limits the RF power from the radio and must be
performed at multiple frequencies to allow for proper alignment
across the entire RF band. The RF band is divided into frequency
zones with a calibration point (value) in each zone.
Refer to your Radio Service Manual for the Transmitter Power
Alignment procedure.
Programming Procedure 1. Press F6 at the TRANSMIT POWER screen to key up the radio. (The
radio’s RF output must be terminated into a 50 ohm load.)
2. While transmitting, modify the Tx power softpot setting using the
UP/DOWN arrow keys. To increase the adjustment speed, use the
Shift-UP/DOWN arrow keys.
3. A relative Tx power value will be displayed, but you must
determine the actual transmitter power output from the service
monitor.
4. Press F6 to de-key the radio and Tab to move between frequency
points.
5. Press F8 to save the new value.
BBC
MOTOROLA Radio Service Software Use UP/DOWN Arrows To Adjust Softpot.
MCS Model:
...TRANSMIT POWER
TRANSMIT POWER
--------------
Current Value New Softpot Value
Frequency High Pwr Low Pwr High Pwr Low Pwr
--------- -------- ------- -------- -------
136.0125 36 61 36 61
144.0125 34 61 34 61
154.0125 30 61 30 61
160.0125 29 61 29 61
167.5125 26 61 26 61
173.9875 24 61 24 61
177.9875 22 61 Transmitter..Off 22 61
0 63
MIN |----+----+----+----+----+----+---X+----+----+----+----+----| MAX
F1 F2 F3 F4 F5 F6 F7 F8 F9 F10
HELP TOGGLE PROGRAM EXIT
PTT VALUE
!
Caution
This procedure should be attempted only by qualified
service personnel. Failure to perform alignment
procedures properly may result in seriously degraded
radio or system performance.
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