Radio Shack PRO-26 - Resetting the Scanner; Safe Listening Practices

ALIGNMENT AND ADJUSTMENT
) PREPARATION FOR ALIGNMENT
L ~' To program the following test frequencies into the channel memories:
j 1) Press MANUAL Enter Channel 1. Press MANUAL
2) Enter the test frequency which corresponds with Channel 1 (Table 1).
3) Press E to store the test frequency.
j Note: Incorrect operation order or method often results in a display of the error indicator "Error 11 or an
L incorrect indication of frequency.
4) Repeat Steps 1 - 3 above to program the next channel in sequence (Table 1).
[ TEST EQUIPMENT REQUIRED
• DC power supply • Oscilloscope • Frequency counter • SINAD meter
\ Battery terminal: 6.0 V
• Digital voltmeter • SSVM • Signal generator (SG)
L
Table 1. Test Frequency
CH
Test Frequency
CH
Test Frequency
1
25.500 MHz
13
954.9125 MHz
2
40.840 MHz
14
1299.9125 MHz
3
62.450 MHz
21
25.100 MHz
4
108.500 MHz
22
139.200 MHz
5
127.175 MHz
23
139.300 MHz
6
162.400 MHz 24
249.600 MHz
7
195.500 MHz
25
249.700 MHz
8
230.050 MHz
26
269.200 MHz
9
325.050 MHz 27
269.300 MHz
10
453.250 MHz
28
530.500 MHz
11
531.500 MHz
29
530.600 MHz
12
765.250 MHz
30
1299.900 MHz
Table 2. VCO Alignment Voltage (at LND5)
CH
Test Frequency
DC Voltage (Typical)
CH
Test Frequency
DC Voltage (Typical)
1
25.500 MHz
3.1 V
13
954.9125 MHz
11.7 V
40.840 MHz
4.3 V
14
Less than 14.8 V
m
62.450 MHz
5.7 V
m
25.100 MHz
More than 2.0 V
n
108.500 MHz
8.2 V
22
9.2 V
n
8.9 V
23
139.300 MHz
9.3 V
WM 162.400 MHz
10.3 V
24
249.600 MHz
Less than 16.3 V
n
195.500 MHz
11.7 V
249.700 MHz
More than 1.1 V
8
230.050 MHz
13.5 V
269.200 MHz
11.9 V
10
453.250 MHz
5.5 V
8.1 V
11
8.3 V
29
8.2 V
12
765,250 MHz
9.1 V
30
1299.900 MHz
12.7 V
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