Transmit Vco Crossover Alignment - Motorola MT 2000 User Manual

SERVICE

4.2.1.6 TRANSMIT VCO CROSSOVER ALIGNMENT

RSS LOCATION:
MOTOROLA Radio Service Software
MTSX
...VCO CROSSOVER
F1 F2
HELP
Refer to your radio service manual for the transmit VCO crossover alignment procedure. This procedure should
only be performed by qualified service personnel.
Transmit deviation limit alignment is a way of correcting 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. Compensation for each of these points must be checked and adjusted if the VCO is replaced.
PROGRAMMING PROCEDURE:
1. Press F2 at the MAIN MENU. The SERVICE MENU appears.
2. Press F2. The TRANSMITTER ALIGNMENT MENU appears.
3. Press F7. The TRANSMIT VCO CROSSOVER screen appears.
4. Press Tab to select the desired field, or press the desired function key (F1 - F10).
5. If a field is selected, press the up/down arrow keys to select choice or value.
FUNCTION KEY DESCRIPTIONS:
F1 - HELP provides useful information about the currently displayed menu, screen, or field.
F6 - TOGGLE PTT function will alternately key and dekey the radio being serviced.
F8 - PROGRAM VALUE function will program the selected value into the radio.
F10 - EXIT moves the display backward in the RSS tree, one screen or menu at a time.
New Frequency Field Definition
This is the VCO crossover softpot value for this frequency. The status bar shows the relationship between this
setting and the minimum and maximum settings.
4-12
At the SERVICE MENU, press
Model:
VCO CROSSOVER
Current
Frequency
486.0250
Transmitter . . . . . .Off
F3 F4
F2 F7
.
Use UP/DOWN Arrows To Adjust Softpot.
New
Frequency
486.0250
F5 F6 F7
TOGGLE
PTT
MTSX RSS
F8 F9 F10
PROGRAM EXIT
VALUE
68P81074C50