Motorola ASTRO XTSTM 2500 Basic Service Manual

Radio Alignment Procedures
24
Radio
Information
Figure 7 shows a typical Radio Information screen.
Reference
Oscillator
Alignment
Adjustment of the reference oscillator is critical for proper radio operation. Improper
adjustment will result not only in poor operation, but also in a misaligned radio that
will interfere with other users operating on adjacent channels. For this reason, the
reference oscillator should be checked every time the radio is serviced, or once a
year, whichever comes first. The frequency counter used for this procedure must
have a stability of 0.1 ppm (or better).
NOTE: Reference oscillator alignment is required after replacing (or
servicing) the transceiver board.
This test can be done with either the R-2670 Communication Analyzer or the
8901_Modulation Analyzer.
• Initial setup using the R-2670 Communication Analyzer:
- RF Control: MONITOR
- B/W: WB
- Freq: CPS frequency under test
- Attenuation: 20dB
- Mon RF in: RF I/O
- Meter: RF Display
- Mode: STD
- Input Level: uV or W
- Display: Bar Graphs
- Squelch: Mid-range or adjust as necessary
• Initial setup using the 8901_ Series Modulation Analyzer:
Figure 7. Radio Information Screen

Motorola ASTRO XTSTM 2500 Specifications

General

Brand	Motorola
Model	ASTRO XTSTM 2500
Category	Portable Radio
Language	English