Motorola ASTRO Digital Spectra User Manual

6881076C25-E September 5, 2008
Troubleshooting Procedures: Power Amplifier Procedures 4-59
Table 4-20. Power Control DC Voltage Chart
LOCATION
RX MODE TX MODE
COMMENTS
LOW TYP HI LOW TYP HI
P0853
1––––––
Key (no pin or wire)
2002.03.2
Control Voltage Limit
3 0 2.0 7.0 10.0
Drive Voltage
4 10.8 13.6 16.5 10.0 13.0 16.0
Current Sense +
50009.29.49.8
Keyed 9.4
6 10.8 13.6 16.5 10.0 13.0 16.0
A+ to Command Board
70 1.2
Temp Sense (cutback begins at 3.3 V)
8––––––
Key (no pin)
9 0 13.0 9.3 5.0
Forward Detect Voltage
10 10.8 13.8 16.6 10.4 13.4 16.2
A+ to Command Board
11 9.4 9.6 9.9 9.4 9.6 9.9
9.6-V Supply from Command Board
12 10.8 13.6 16.5 9.8 12.8 15.8
Current Sense – (voltage delta 150 mV)
U0500
1000000
Ground
20 3.2
Control AMP Input
3000000
Control AMP Input (not used)
40023.2
Control Voltage Limit (cutback at 3.3 V)
50 0
N.C.
6 1.5 3.0 4.5 1.5 3.0 4.5
Power Set from D-A (max power at 1.5 V)
701.53.04.5
Power Set Buffer Out
801.33.56.0
Coupler Buffer Out
901.33.56.0
Forward Detect Voltage
10 0 0
Reflected Power Detect (not used)
11 0 1.3 3.5 6.0
Same as pin 8 (not used)
12 0 0 1.2 6.0
Thermister Buffer out (increases as PA gets hot)
13 0 0 1.2 6.0
Thermister Buffer in
14 5.0 5.0
5-V Sense Input (follows pin 20 ±0.1 V)

Motorola ASTRO Digital Spectra Specifications

General

Brand	Motorola
Model	ASTRO Digital Spectra
Category	Radio
Language	English