526-20
PRO-96
Digital Trunking Handheld Scanner
Catalog Number: 20-526
|
CONTENTS |
|
Page |
Specifications .................................................................................................................................................... |
2 |
Block Diagram ................................................................................................................................................... |
4 |
Alignment and Adjustment ................................................................................................................................ |
5 |
Troubleshooting ................................................................................................................................................. |
9 |
Printed Circuit Board ....................................................................................................................................... |
16 |
Wiring Diagram ................................................................................................................................................ |
20 |
Exploded View ................................................................................................................................................. |
21 |
Mechanical Parts List ....................................................................................................................................... |
22 |
Electrical Parts List ........................................................................................................................................... |
23 |
Semiconductor Lead Identification .................................................................................................................. |
57 |
Microprocessor (IC204) Port Format ............................................................................................................... |
63 |
Schematic Diagram ......................................................................................................................................... |
64 |
© 2003 RadioShack Corporation
All Rights Reserved.
SPECIFICATIONS
Frequency Coverage |
25.000-27.995 MHz |
5 kHz steps (AM) |
|
|
|
28.000-54.000 MHz |
5 kHz steps (FM) |
|
|
|
108.000-136.9875 MHz |
12.5 kHz steps (AM) |
|
|
|
137.000-150.775 MHz |
5 kHz steps (FM) |
|
|
|
150.7825-150.8125 MHz |
7.5 kHz steps (FM) |
|
|
|
150.815-154.4525 MHz |
7.5 kHz steps (FM) |
|
|
|
154.45625-154.47875 MHz |
7.5 kHz steps (FM) |
|
|
|
154.4825-154.505 MHz |
7.5 kHz steps (FM) |
|
|
|
154.510-154.525 MHz |
5 kHz steps (FM) |
|
|
|
154.5275-154.54625 MHz |
6.25 kHz steps (FM) |
|
|
|
154.5475-154.6075 MHz |
7.5 kHz steps (FM) |
|
|
|
154.610-154.655 MHz |
5 kHz steps (FM) |
|
|
|
154.6575-156.2475 MHz |
7.5 kHz steps (FM) |
|
|
|
156.250-157.475 MHz |
5 kHz steps (FM) |
|
|
|
157.4775-161.565 MHz |
7.5 kHz steps (FM) |
|
|
|
161.570-173.200 MHz |
5 kHz steps (FM) |
|
|
|
173.20375-173.2225 MHz |
6.25 kHz steps (FM) |
|
|
|
173.225-173.3875 MHz |
6.25 kHz steps (FM) |
|
|
|
173.390-173.415 MHz |
6.25 kHz steps (FM) |
|
|
|
173.420-174.000 MHz |
5 kHz steps (FM) |
|
|
|
216.0025-221.9975 MHz |
5 kHz steps (FM) |
|
|
|
222.000-225.000 MHz |
5 kHz steps (FM) |
|
|
|
406.000-512.000 MHz |
6.25 kHz steps (FM) |
|
|
|
806.000-823.9875 MHz |
6.25 kHz steps (FM) |
|
|
|
849.000-868.9875 MHz |
6.25 kHz steps (FM) |
|
|
|
894.000-960.000 MHz |
6.25 kHz steps (FM) |
|
|
|
1240.000-1300.000 MHz |
6.25 kHz steps (FM) |
|
|
|
|
Unit |
Niminal |
Limit |
Sensitivity |
|
|
|
|
FM: (S+N)/N=20 dB |
25-54 MHz |
μV |
0.1 |
1 |
Dev.: 3 kHz at 1 kHz |
108-136.9875 MHz |
μV |
0.3 |
1 |
|
137-225 MHz |
μV |
0.5 |
2 |
|
406-512 MHz |
μV |
0.5 |
2 |
|
806-960 MHz |
μV |
0.7 |
3 |
|
1240-1300 MHz |
μV |
0.7 |
4 |
AM: (S+N)/N=20 dB |
25-54 MHz |
μV |
1 |
3 |
Mod.: 60% at 1 kHz |
108-136.9875 MHz |
μV |
1 |
3 |
|
137-225 MHz |
μV |
1.5 |
5 |
|
406-512 MHz |
μV |
2 |
6 |
|
806-960 MHz |
μV |
2 |
6 |
|
1240-1300 MHz |
μV |
3 |
12 |
2
|
|
|
Unit |
Niminal |
Limit |
Data decode sensitivity |
|
|
|
|
|
CT |
350 Hz Dev. at 41, 174, 450, 860 MHz |
μV |
1 |
3 |
|
DC |
350 Hz Dev. at 41, 174, 450, 860 MHz |
μV |
1 |
3 |
|
ED |
4 kHz Dev. at 174, 450, 860 MHz |
μV |
1 |
4 |
|
MO (Voice Channel) |
350 Hz Dev. at 174, 450, 860 MHz |
μV |
0.5 |
3 |
|
MO (Control Channel) |
4 kHz Dev. at 174, 450, 860 MHz |
μV |
1 |
4 |
|
WX Alert 1050 Hz tone |
3 kHz Dev. at 162.4 MHz |
μV |
0.3 |
1 |
|
WX Digital Weather Alert |
4 kHz Dev. at 162.4 MHz |
μV |
0.5 |
2 |
|
Squelch sensitivity |
|
|
|
|
|
at threshold |
(AM/FM) |
|
μV |
0.5 |
2 |
at tight (FM) |
|
|
dB |
25 |
15 |
at tight (AM) |
|
|
dB |
20 |
10 |
Spurious refection (Except Primary image) |
at 174 MHz |
dB |
40 |
30 |
|
Acceptable radio frequency displacement (EIA RS-204D) |
kHz |
±6 |
±3 |
||
Signal to noise ratio (FM and AM) |
|
|
|
|
|
RF input: 100 μV |
25-54 MHz |
|
dB |
40 |
30 |
Dev. 3 kHz at 1 kHz |
108-136.9875 MHz |
dB |
40 |
30 |
|
Mod.: 60% at 1 kHz |
137-225 MHz |
|
dB |
40 |
30 |
|
406-512 MHz |
|
dB |
35 |
25 |
|
806-960 MHz |
|
dB |
35 |
25 |
|
1240-1300 MHz |
dB |
35 |
25 |
|
Residual noise |
Volume control, set to its minimum, squelched |
mV |
1 |
3 |
|
Scanning rate |
without trunking |
channels/sec. |
60 |
33-66 |
|
Search rate |
at 162.25-164.25 MHz |
steps/sec. |
75 |
60-85 |
|
Scan delay time |
|
|
sec. |
2 |
1-3 |
Audio output power |
10% THD |
|
mW |
170 |
140 |
Current drain (using AC or DC adapter) |
Squelched |
mA |
130 |
150 |
|
Channels of operation |
Any 500 channels in any band combination and 11 in V-Scanner |
|
|
||
Channels, frequency, |
Liquid crystal display |
|
|
|
|
and mode display |
|
|
|
|
|
Receiving system |
Direct key entry digital-controlled synthesizer, |
|
|
|
|
|
|
1st IF: 380.72750-380.86875 MHz |
|
|
|
|
|
2nd IF: 21.4 MHz |
|
|
|
|
|
3rd IF: 455 kHz |
|
|
|
Power source |
6V DC negative ground only |
|
|
|
|
|
4AA batteries or a suitable adapter |
|
|
|
|
Jacks |
Antenna, earphone, PC/IF, and external power |
|
|
|
|
Dimensions (HWD) |
6 3/16 x 2 7/16 x 1 3/4 inches (157 x 62 x 41 mm) |
|
|
||
Weight |
apporox. 8.8 oz. (250 g) without antenna and batteries |
|
|
Note: Nominal specs represent the design specs. All units should be able to approximate these specifications. Some units will exceed while some many drop below these specs. Limit specs represent the absolute worst condition still considered acceptable. A unit should NEVER fail to meet limit specs.
3
BLOCK DIAGRAM
4