Motorola ASTRO Digital Spectra User Manual

September 5, 2008 6881076C25-E
4-32 Troubleshooting Procedures: Power Amplifier Procedures
U0500
1 000000
Ground
20 3.2
Control AMP Input
3 000000
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)
7 0 0 1.5 3.0 4.5
Power Set Buffer Out
8 0 1.3 3.5 6.0
Coupler Buffer Out
9 0 1.3 3.5 6.0
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)
15 4.9 5.0 5.7 4.9 5.0 5.7
5-V Current Limit (limits at 5.7 V)
16 5.0 5.7 6.4 5.0 5.7 6.4
5-V Series Pass Drive (6.4 at max current)
17 9.5 9.6 9.9 9.5 9.6 9.9
9.6-V Sense Input
18 7 7
5-V Reg. Compensation Capacitor
19 5.7 5.7
N.C.
20 4.9 5.0 5.1 4.9 5.0 5.1
5-V Reference Input (UNSW5-V)
21 1.2 1.2
9.6-V Reg. Compensation Capacitor
22 0 0
N.C.
23 0.9 9.6 1.2 9.6
9.6-V Series Pass Drive
24 2.9 3.3
Regulator Enable/Compensation
25 ––––––
9.6-V Programming (N.C.)
26 0 0
N.C.
27 13.6 13.6
N.C.
28 ––––––
9.6-V Programming (N.C.)
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