TM 11-5820-919-40-2
ANTENNA TUNER A2A2 ALIGNMENT
The alignment procedure is to be used in either of these situations: (1) the performance test calls a potentiometer out of adjustment, or (2) one of the following is
replaced:
1.
Comparator/Control Hybrid A1
2.
RF Sensor Bridge
The procedure consists of a preliminary setup and adjustment procedure. The adjustment procedure can be shortened by adjusting R1, R2, B3 and R4 to the values
given in step 13 below. The complete procedure need only be run if work has been done on the rf Sensor Bridge.
PRELIMINARY SETUP
1. Connect test radio as in figure 10-5.
2. Connect an rf signal generator to the input of the
power amplifier module at A1J1. Set the level to
-100dbm and the frequency to 2.000 MHz.
3. Remove the antenna tuner module from the test
bed radio. Separate the two halves of the antenna
tuner module which is to be aligned, except for the
interconnecting ribbon cable.
4. Plug the antenna tuner module to be aligned into
the test bed radio.
5. Connect the 100 ohm load (figure 3-11E, TM 11-
5820-919-40-1 to the radio set BNC connector.
6. Set the radio control to the following:
a.
FREQUENCY KHz to 02,000.0
b.
MODE to V-TR
c.
SB to USB
d.
VOLUME to on
e.
ANT SEL to BNC
ADJUSTMENT
1. Close CW KEY and switch MODE to V-RCV and
back to V-TR. This generates a tune start pulse.
2. Ground (continuously) E7 of ribbon cable.
3. Increase level of rf signal generator until TP13 is
+10v rms. This corresponds to 2 watts in a 50-ohm
system.
4. Measure the dc output of the Z sensor at TP12.
Record voltage at TP12.
5. Adjust R4 until the Z comparator reference
voltage, TP10, is the same as that measured in step
4.
6. Replace the 100 load with the 130-ohm load (figure
3-11-F, TM 11-5820-919-40-1).
7. Adjust the rf signal generator so that the voltage at
TP13 varies b7 ant +14v (+7v = 1 watt, +14v
= 4 watts) and measure the output of the vswr
detector at TP11. But, do not stay at the 4-watt level
for any length of tine.
8. Adjust the level compensation resistor, R7, for
minimum variation in do output of TP11 as performed
in step 7.
9. Once R7 is adjusted, adjust the rf signal generator
so that TP13 is +10v rms, Note the voltage at TP11.
ADJUSTMENT (cont)
10. Adjust B3 until the 1.5 vswr reference voltage,
TP9, is the same as that noted in step 9.
11. Adjust B2 until the 1.6 vswr reference voltage at
TP8 is +10.6v higher than that of TP9.
12. Adjust B1 until the voltage at TP7 is +3.0v.
13. The following are typical settings after alignment:
ALC REM
R1
TP7
+3.0v
1.6 REP
R2
TP8
+4.3v
1.5 REP
R3
TP9
+3.7v
ZREF
R4
TP10
+3.3v
14. Turn radio off and disconnect test equipment.
Reassemble the two boards of the antenna tuner
module being very careful to avoid pinching the ribbon
cable.
96
Summary of Contents for AN / PRC- 1 04(A)
Page 10: ...TM 11 5820 919 40 2 Figure 1 1 Radio Set Block Diagram Sheet 1 of 2 2 ...
Page 11: ...TM 11 5820 919 40 2 Figure 1 1 Radio Set Block Diagram Sheet 2 of 2 3 ...
Page 12: ...TM 11 5820 919 40 2 Figure 1 2 Radio Set Power Distribution 4 ...
Page 15: ...TM 11 5820 919 40 2 Figure 1 4 Radio Set Performance Test Sheet 2 of 2 7 ...
Page 17: ...Figure 2 1 Receiver Exciter A1 Interconnection Schematic 9 TM 11 5820 919 40 2 ...
Page 18: ...TM 11 5820 919 40 2 Figure 2 2 Receiver Exciter A1 Component Location Sheet 1of 2 10 ...
Page 22: ...TM 11 5820 919 40 2 Figure 2 4 Receiver Exciter A1 Performance Test Sheet 2 of 2 14 ...
Page 23: ...TM 11 5820 919 40 2 Figure 3 1 Modulator Demodulator A1A1 Schematic 15 ...
Page 27: ...TM 11 5820 919 40 2 Figure 3 4 Modulator Demodulator A1A1 Performance Test Sheet 1 of 4 19 ...
Page 28: ...TM 11 5820 919 40 2 Figure 3 4 Modulator Demodulator A1A1 Performance Test Sheet 2 of 4 20 ...
Page 29: ...TM 11 5820 919 40 2 Figure 3 4 Modulator Demodulator A1A1 Performance Test Sheet 3 of 4 21 ...
Page 30: ...TM 11 5820 919 40 2 Figure 3 4 Modulator Demodulator A1A1 Performance Test sheet 4 of 4 22 ...
Page 33: ...TM 11 5820 919 40 2 Figure 3 5 First Frequency Converter A1A1A1 Schematic 25 ...
Page 37: ...TM 11 5820 919 40 2 Figure 3 8 First Frequency Converter A1A1A1 Performance test 29 30 blank ...
Page 38: ...TM 11 5820 919 40 2 Figure 3 9 Second Frequency Converter A1A1A2 Schematic 31 ...
Page 41: ...TM 11 5820 919 40 2 Figure 3 11 Second Frequency Converter A1A1A2 Performance Test 34 ...
Page 42: ...TM 11 5820 919 40 2 Figure 3 12 Third Frequency Converter A1A1A3 Schematic 35 ...
Page 45: ...TM 11 5820 919 40 2 Figure 3 14 Third Frequency Converter A1A1A3 Performance test 38 ...
Page 50: ...TM 11 5820 919 40 2 Figure 4 4 Harmonic Filter A1A2 Performance Test Sheet 2 of 3 43 ...
Page 51: ...TM 11 5820 919 40 2 Figure 4 4 Harmonic Filter A1A2 Performance Test Sheet 3 of 3 44 ...
Page 55: ...TM 11 5820 919 40 2 Figure 5 2 Synthesizer A1A3 Component Location Sheet 1 of 2 48 ...
Page 59: ...TM 11 5820 919 40 2 Figure 5 4 Synthesizer A1A3 Performance Test Sheet 2 of 2 52 ...
Page 62: ...TM 11 5820 919 40 2 Figure 6 1 Control Panel A1A4 Schematic Sheet 2 of 2 55 ...
Page 67: ...TM 11 5820 919 40 2 Figure 6 4 Control Panel A1A4 Performance Test Sheet 2 of 4 60 ...
Page 68: ...TM 11 5820 919 40 2 Figure 6 4 Control Panel A1A4 Performance Test Sheet 3 of 4 61 ...
Page 69: ...TM 11 5820 919 40 2 Figure 6 4 Control Panel A1A4 Performance Test Sheet 4 of 4 62 ...
Page 70: ...TM 11 5820 919 40 2 Figure 7 1 Power Supply A1A5 Schematic 63 ...
Page 71: ...TM 11 5820 919 40 2 Figure 7 2 Power Supply A1A5 Component Location Sheet 1 of 2 64 ...
Page 75: ...TM 11 5820 919 40 2 Figure 7 4 Power Supply A1A5 Performance Test Sheet 2 of 2 68 ...
Page 77: ...TM 11 5820 919 40 2 Figure 8 1 Amplifier Coupler A2 Schematic 71 ...
Page 78: ...TM 11 5820 919 40 2 Figure 8 2 Amplifier Coupler A2 Component Location Sheet 1 of 2 72 ...
Page 81: ...TM 11 5820 919 40 2 Figure 8 4 Amplifier Coupler A2 Performance Test 75 ...
Page 82: ...TM 11 5820 919 40 2 Figure 9 1 Power Amplifier A2A1 Schematic Sheet 1 of 2 76 ...
Page 83: ...TM 11 5820 919 40 2 Figure 9 1 Power Amplifier A2A1 Schematic Sheet 2 of 2 77 ...
Page 84: ...TM 11 5820 919 40 2 Figure 9 2 Power Amplifier A2A1 Component Location Sheet 1 of 3 78 ...
Page 85: ...TM 11 5820 919 40 2 Figure 9 2 Power Amplifier A2A1 Component Location Sheet 2 of 3 79 ...
Page 88: ...TM 11 5820 919 40 2 Figure 9 4 Power Amplifier A2A1 Performance Test Sheet 1 of 3 82 ...
Page 89: ...TM 11 5820 919 40 2 Figure 9 4 Power Amplifier A2A1 Performance Test Sheet 2 of 3 83 ...
Page 90: ...TM 11 5820 919 40 2 Figure 9 4 Power Amplifier A2A1 Performance Test Sheet 3 of 3 84 ...
Page 92: ...TM 11 5820 919 40 2 Figure 10 1 Antenna Tuner A2A2 Schematic Sheet 1 of 2 86 ...
Page 93: ...TM 11 5820 919 40 2 Figure 10 1 Antenna Tuner A2A2 Schematic Sheet 2 of 2 87 ...
Page 94: ...TM 11 5820 919 40 2 Figure 10 2 Antenna Tuner A2A2 Component Location Sheet 1 of 3 88 ...
Page 95: ...TM 11 5820 919 40 2 Figure 10 2 Antenna Tuner A2A2 Component Location Sheet 2 of 3 89 ...
Page 99: ...TM 11 5820 919 40 2 Figure 10 4 Antenna Tuner A2A2 Performance Test Sheet 2 of 3 93 ...
Page 100: ...TM 11 5820 919 40 2 Figure 10 4 Antenna Tuner A2A2 Performance Test Sheet 3 of 3 94 ...
Page 104: ......
Page 105: ...PIN 059437 ...