55
Front-End Filter
Alignment
From the MAIN MENU, press F2, F3 and then F2 to access this screen.
This alignment procedure is required every time the RF Board is replaced or
serviced. This alignment adjusts the corner frequencies of an RF front-
end bandpass filter. It needs to 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 Front-End Filter Alignment
procedure.
Programming Procedure 1. Apply the appropriate RF signal to the radio.
2. Modify the Rx Front End Filter Softpot setting using the UP/
DOWN arrow keys.
3. Use the Tab key to move between frequency points.
4. Press F8 to save the new values.
Function Key Descriptions
F8 - PROGRAM VALUE Programs the selected value into the radio.
Field Definition
New Softpot Value This is the softpot value for this frequency. The status bar shows the
relationship between this setting and the minimum and maximum
settings.
BCB
MOTOROLA Radio Service Software Use UP/DOWN Arrows To Adjust Softpot.
MCS Model:
...FRONT END FILTER (VHF & UHF ONLY)
FRONT END FILTER (VHF & UHF ONLY)
---------------------------------
Current
Frequency Value New Softpot Value
--------- ------- -----------------
136.0625 20 20
144.0625 25 25
154.0625 33 33
160.0625 38 38
167.5625 47 47
173.9375 56 56
177.9375 60 60
0 63
MIN |----+----+----+---X+----+----+----+----+----+----+----+----| MAX
F1 F2 F3 F4 F5 F6 F7 F8 F9 F10
HELP PROGRAM EXIT
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.
To Next Page
Loading...
Need help?
General