Figure 6-8. Reference Oscillator Window; Table 6-10. Reference Oscillator Alignment - Motorola ASTRO XTL 5000 Basic Service Manual

Radio Alignment Procedures: Transmitter Alignments
- Display: Bar Graphs
- Squelch: Mid-range or adjust as necessary
• Initial setup using the Agilent 8901 Modulation Analyzer:
- Press the green Automatic Operation button on the analyzer.
- Press the FREQ key.
- Type 7.1, followed by the SPCL button, to set the 8901 Modulation Analyzer for maximum
accuracy.
1. Select Reference Oscillator from the Tuner Main Menu
2. If you are using the R-2670 analyzer, enter the frequency displayed on the Tuner screen in
the "RF control" section of the R-2670. Under the "Meter" section of the display, choose
RF DISPLAY.
3. Left-click the PTT Toggle button on the screen to make the radio transmit. The screen
indicates whether the radio is transmitting.
4. Wait five seconds until the analyzer reading stabilizes, and then record the transmitter
frequency.
5. Adjust the reference oscillator's softpot value until the measured value is as close as possible
to the frequency shown on the screen. Allow approximately five seconds for the analyzer
frequency reading to stabilize after each change. See
6. Left-click the Program All button on the screen to dekey the radio and save the tuned values.
7. Left-click the Close button on the screen to return to the Tuner Main Menu.
6871769L01-A

Figure 6-8. Reference Oscillator Window

Table 6-10. Reference Oscillator Alignment

Band
VHF
UHF
800 MHz
(Figure 6-8).
Table 6-10.
Target
±150 Hz
±150 Hz
±100 Hz
6-9
October 30, 2006