30
Transmit Deviation
Balance
(Compensation)
Alignment
From the MAIN MENU, press F2 twice and then F4 to access this
screen.
Compensation alignment balances the modulation sensitivity of the
VCO and reference modulation (synthesizer low-frequency port) lines.
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: Balanced compensation alignment is required after
replacement or servicing of the Controller board or RF board.
The RSS reads the radio codeplug and displays the frequency and
current value (determined by reading the radio codeplug) on the left
side of the screen. Balance softpot values are displayed on the right
side of the screen. A bar at the bottom of the screen shows the current
setting in relation to the minimum and maximum settings.
Use the UP/DOWN arrow keys to make adjustments according to
instructions provided in the appropriate Radio Service Manual.
Performing this procedure automatically calculates compensation
alignment.
BBD
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 BAL
Transmit Deviation Balance (Compensation) Alignment
---------------------------------------------------
Test Current
Frequency Value New Softpot Value
450.02500 30 30
465.22500 30 30
475.22500 30 30
484.97500 45 45
500.27500 45 45
511.97500 45 45
519.97500 45 45
0 64
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. Compensation alignment is critical
to the operation of signalling schemes that have very
low frequency components (i.e., DPL) and could result
in distorted wave-forms if improperly adjusted.
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