Transmit Deviation Balance (Compensation) Alignment - Motorola HT 1000 User Manual

Transmit Deviation
Balance
(Compensation)
Alignment
BBD
30
From the MAIN MENU, press F2 twice and then F4 to access this
screen.
MOTOROLA Radio Service Software
HT/JT1000/VISAR Model:
Serial:
SERVICE:XMIT ALIGN:XMIT DEV BAL

Transmit Deviation Balance (Compensation) Alignment

---------------------------------------------------
Test Current
Frequency Value
450.02500 30
465.22500 30
475.22500 30
484.97500 45
500.27500 45
511.97500 45
519.97500 45
0
MIN |----+----+----+----+----X----+----+----+----+----+----+----| MAX
F1 F2 F3
HELP
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.
This procedure should be attempted only by qualified
!
service personnel. Compensation alignment is critical
to the operation of signalling schemes that have very
Caution
low frequency components (i.e., DPL) and could result
in distorted wave-forms if improperly adjusted.
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.
Use<:or <SHIFT><<SHIFT>:keys to change
and <ENTER> to go to next softpot.
New Softpot Value
F4 F5 F6 F7
TOGGLE
PTT
30
30
30
45
45
45
45
64
F8 F9 F10
PROGRAM EXIT
VALUE