32
Transmit Deviation
Limit Alignment
From the MAIN MENU, press F2 twice and then F5 to access the
TRANSMIT DEVIATION LIMIT screen.
This procedure is used to correct 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.
Note: Compensation for each of these points must be checked
and adjusted if the VCO is replaced.
The status bar at the bottom of the screen shows the relationship
between the softpot value for each frequency as a value between the
minimum and maximum settings.
Refer to your Radio Service Manual for the Transmit Deviation Limit
Alignment procedure.
Programming Procedure 1. Press F6 to key up the radio. (The radio’s RF output must be
terminated into a 50 ohm load.)
2. Apply the appropriate signal according to instructions provided in
your Radio Service Manual. While transmitting, modify the VCO
Attenuator setting with the UP/DOWN arrow keys.
3. Measure the actual RF power with a service monitor.
4. Press F6 to de-key the radio.
5. Press F8 to save the new value.
6. Use Tab to move between frequency points, repeating steps 1
through 5 for each field.
BBE
MOTOROLA Radio Service Software Use<:or <SHIFT><<SHIFT>:keys to change
HT/JT1000/VISAR Model: and <ENTER> to go to next softpot.
Serial:
SERVICE:XMIT ALIGN:XMIT DEV LIM
Transmit Deviation Limit Alignment
----------------------------------
Test Current
Frequency Value New Softpot Value
450.02500 175 175
465.22500 175 175
475.22500 180 180
484.97500 180 180
500.27500 180 180
511.97500 180 180
519.97500 180 180
0 255
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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