Motorola ASTRO Digital Spectra User Manual

September 5, 2008 6881076C25-E
4-24 Troubleshooting Procedures: Power Amplifier Procedures
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 (UNSW5V)
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.)
29 ––––––
9.6-V Programming (N.C.)
30 ––––––
9.6-V Programming (N.C.)
31 000000
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
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)
Table 4-8. Power Control DC Voltage Chart (Continued)
LOCATION
RX MODE TX MODE
COMMENTS
LOW TYP HI LOW TYP HI
J1

Motorola ASTRO Digital Spectra Specifications

General

Brand	Motorola
Model	ASTRO Digital Spectra
Category	Radio
Language	English