Motorola ASTRO Digital Spectra User Manual

6881076C25-E September 5, 2008
Troubleshooting Procedures: Power Amplifier Procedures 4-33
NOTE: For antenna switch transmit bias conditions, RF drive must be removed from PA.
29 ––––––
9.6-V Programming (N.C.)
30 ––––––
9.6-V Programming (N.C.)
31 0 0 0 0 0 0
Ground
32 10.8 13.6 16.5 10.0 13.0 16.0
Decoupled A+
33 4.0 5.0 0 0.2
TX PA Enable (from U520-25)
34 0 1.3
Control AMP one-shot
35 0 0
Lock (5-V of Synth Out of Lock)
36 0 0.8
Control AMP one-shot
37 10.8 13.6 16.3 10.0 13.0 16.0
A+ (Current Sense +)
38 10.8 13.6 16.3 10.0 13.0 16.0
Current Sense - Voltage Delta 150 mV (30 Watt
only)
39 0 9.2 9.4 9.8
Keyed 9.4-V in
40 1.5 3.0 4.5 1.5 3.0 4.5
Current Limit D-A (max current at 4.5 V)
41 0 0 0 0 0 0
Ground
42 0 2.2 9.6
Control AMP Output (Approx 1/2-V Control)
43 1.3 7.0
Loop Integrator Capacitor
44 2.1 3.2
Control AMP Reference
Q0500E 13.0 13.0
A+ – CR0500 Drop
Q0501C 12.3 12.3
VQ0500E - B/E Drop
Q0501E 0.2 0.2
V pin 23 - B/E Drop
Q0503E 0 1.5
V pin 42 - B/E Drop (TX)
Q0503C 13.6 9.0
Q0504B 13.6 12.9
A+ - B/E Drop (TX)
Table 4-11. Power Control DC Voltage Chart (Continued)
LOCATION
RX MODE TX MODE
COMMENTS
LOW TYP HI LOW TYP HI

Motorola ASTRO Digital Spectra Specifications

General

Brand	Motorola
Model	ASTRO Digital Spectra
Category	Radio
Language	English