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Figure 1-4. Radio Set Performance Test (Sheet 2 of 2)
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TM-11-5820-919-40-2 Radio Set AN/PRC-104(A) (NSN
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Figure 2-1. Receiver/Exciter A1 Interconnection Schematic


TM 11 5820-919-40-2
TABLE A
NOTE 5. SPURIOUS RECEIVE SIGNALS
FREQ (MHz)
FREQ (MHz)
FREQ (MHz)
FREQ (MHz)
FREQ (MHz)
1. A spurious receive signal is an audio tone heard in the handset in receive when no tone should be present (i.e., no
2.2222
5.6250
12.0833
17.7777
25.3571
signal present at the antenna connector). These signals are produced as a result of interaction (harmonic crossover)
2.5000
5.7143
12.5000
17.9167
25.4167
between the first and second local oscillators. Military specifications for this radio set permit a maximum of 200
2.9412
5.8000
12.7273
17.9169
25.5555
spurious signals to be generated within the frequency synthesizer, A1A3, without adversely affecting the radio set's
3.0555
5.8333
12.8125
18.6666
25.6250
acceptability. Table A lists those frequencies at which acceptable spurious signals may be encountered in some
3.1250
6.0000
12.9167
18-7500
25.7143
radio sets. In addition to those frequencies listed in table A are the fundamental of the 5 MHz local oscillator (see
3.3333
6 1338
13.1250
18.8235
26.0000
frequency [sited on case of 5 MHz L.O., A1A3U1).
3.4375
6 2500
13.3333
18.8888
26.2500
2. Use of table A: For each frequency listed at which acceptable spurious signals may be encountered, there are
3.5294
6.6666
13.5000
19.0909
26.3636
several dial frequencies at which audible tones may be heard.
3.7500
7.0833
13.6111
19-1666
26.6666
4.0000
7.2727
13.6364
19.6429
26.9231
Example: Internally generated spurious signal at 13.5000 MHz.
4.0625
7.5000
13.7500
20.0000
27.1429
a. With a dial frequency of 13,501.0KHz, LSB selected, the audio tone produced would be 1.0 KHz.
4 1666
7.6471
14.0000
20.3125
27.2727
4 2857
7 8125
14.1176
20.3571
27 5000
b. With a dial frequency of 13,498.6~Bz, USB selected, the audio tone produced would be 1.4 KHz.
4.3750
8 0000
14.2857
20.5000
27 6923
4.4444
8.1818
14.3750
20.6250
28.2143
4.5000
8.6375
14.4444
20.6666
28.5000
4.5455
8.5000
14.5455
20.9091
28.5714
4.5833
8.6666
14.6875
21.3333
28.7500
4.6154
8.9474
14.7059
21.5000
29.1666
4 6429
9.1666
15.3125
21.5385
29.2308
4 6666
9 3333
15.3333
21-7857
29.3750
4.6875
9 5000
15.3571
21.8750
29.5000
4 7059
9.6429
15.5000
22.0000
29.5833
4 7222
9 6875
15.6250
22.2222
29.9999
4.7368
9 7222
15.7141
22.3077
5 2632
10.0000
15.7143
22.5000
5 2777
10.3125
16.0000
23.0769
5.2941
10.3371
16.0714
23.3333
5.3125
10 6666
16.1538
23.5000
5.3333
10 7692
16.5000
23.7500
5.3571
11.0714
16.6000
23.8462
5.3846
11.1111
16.7857
24.0000
5 4167
11.2500
16.9231
24.2857
5 4545
11 5385
17.1429
24.3750
5.5000
11 8182
17.5000
24.5833
5.5555
11.8750
17.6923
24.6875
8


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