28
Transmit Power
Alignment
From the MAIN MENU, press F2 twice and then F3 to access the
TRANSMIT POWER ALIGNMENT screen.
Refer to your Radio Service Manual for the Transmitter Power
Alignment procedure.
Note: Lower power tuning is not applicable to 800 MHz or low-band
models.
Programming Procedure 1. Press F6 at the TRANSMIT POWER screen to key up the radio and
toggle PTT. The radio’s RF output must be terminated into a 50
ohm load. A three-minute time-out-timer is enabled when the
radio is keyed.
Test frequency and current high and low power levels are shown
on the left side of the screen. The status bar at the bottom of the
screen shows the actual setting in relation to the minimum and
maximum settings allowed for transmission power. If an error
occurs, a pop-up message will appear to indicate the type of error
that occurred. (Refer to the list of computer-to-radio
communication error codes in the Appendix.)
2. While the radio is transmitting, modify the TX power softpot
setting using the UP/DOWN arrow keys. Use the Shift-UP/DOWN
arrow keys to increase the adjustment speed.
Note: A relative TX power value will be displayed, but you must
measure the actual RF power with a service monitor.
BBC
MOTOROLA Radio Service Software Use<:or <SHIFT><<SHIFT>:keys to change
HT/JT/VISAR Model: and <ENTER> to go to next softpot.
Serial:
SERVICE:XMIT ALIGN:XMIT PWR
Transmit Power Alignment
------------------------
Test Current Value New Softpot Value
Frequency Power Level Power Level
High Low High Low
450.02500 43 72 43 72
465.22500 48 73 48 73
475.22500 51 74 51 74
485.97500 56 76 56 76
500.27500 63 79 63 79
511.97500 68 82 68 82
519.97500 48 84 48 84
0 127
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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