BENDIX/KING
KX 165A
Rev 0, Jun/2000
15610M00.RCD
Page 5-13
3.
Sequentially adjust the CPRS1, CPRS2, CPRS3 and CPRS4 for maximum AGC
voltage. Reduce the input level as required to keep the AGC voltage less than 1.5
V. Repeat this sequence as required until no further improvement is noted.
4.
Repeat the above steps at frequencies of 127.5 MHz and 136.9 MHz. (Frequencies
122.75 and 132.75 MHz are not programmed).
5.
For radios lacking the 8.33 kHz option:
Advance to the first IFLT page. Apply a 127.50MHz -50 dBm, FM signal sine wave
modulated with 30 kHz peak deviation at a 100 Hz rate to the COM antenna input.
Do not readjust signal generator power level. Monitor U3015-18 using a scope
probe and oscilloscope. Set scope for .2 msec/div. and external trigger on the sine
wave modulation generator. Adjust the Nav inc/dec knobs in each of the two IFLT
pages so that the 21.4 MHz envelope is at a maximum flat response.
For radios having the 8.33 kHz option:
a.
Put the KX165A into alignment mode and push the NAV Mode button until the
‘CRAG’ page appears. Note the setting of ‘CRAG’ and then turn the Nav Chan-
nel knob until ‘CRAG’ is at 62.
b.
Turn the unit off and then back on. Tune the KX165A to either 127.500 to tune
the wide crystal filters or 127.505 to tune the narrow. Only tune the filter that has
been modified, and only tune the side of the filter (input or output) that has been
modified. Leave all others at the factory setting.
c.
Apply a -45dBm rf signal at 127.500MHz to the Com antenna input. FM this sig-
nal at 30kHz peak deviation at a 30Hz rate.
d.
Monitor E13 on the IF filter board (200-09709-XXXX) with a scope probe and os-
cilloscope. Set the oscilloscope for 1ms/div and external trigger on the 30Hz
sinewave modulation generator.
e.
Adjust either C35 or C36 of the wide filter or C33 or C34 of the Narrow filter for
maximum amplitude with minimum ripple. Only adjust the capacitor on the side
of the filter where a component was replaced. Capacitors on both sides of the
filter will need to be readjusted if the crystal filter has been replaced.
f.
Remove the FM from the signal generator and adjust the rf power to -70dBm.
g.
Measure IF AGC at P3002 pin 3 using a DVM.
h.
Manually adjust the rf frequency ±2.7kHz (narrow) or ±8kHz (wide) in 300Hz
steps. Ensure that the peak to peak voltage change of the IF AGC is less than
12mV. If necessary, readjust the trim capacitor(s).
i.
Re-enter alignment mode and return ‘CRAG’ to its original value.
5.2.2.2.4
COM RF AGC Alignment
NOTE: The Com RF AGC also sets the carrier-squelch threshold.
Содержание Bendix/King KX 165A
Страница 1: ...MAINTENANCE MANUAL KX 165A NAV COMM TRANSCEIVER MANUAL NUMBER 006 15610 0000 REVISION 0 JUNE 2000 ...
Страница 8: ...BENDIX KING KX 165A Page vi 15610M00 RCD Rev 0 Jun 2000 THIS PAGE RESERVED ...
Страница 12: ...BENDIX KING KX 165A Page 4 4 15610M00 RCD Rev 0 Jun 2000 THIS PAGE RESERVED ...
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Страница 17: ...BENDIX KING KX 165A Rev 0 Jun 2000 15610M00 RCD Page 4 11 Figure 4 3 Transmitter Block Diagram ...
Страница 20: ...BENDIX KING KX 165A Rev 0 Jun 2000 15610M00 RCD Page 4 15 Figure 4 4 VOR Signal Generation ...
Страница 21: ...BENDIX KING KX 165A Page 4 16 15610M00 RCD Rev 0 Jun 2000 Figure 4 5 Localizer Signal Generation ...
Страница 23: ...BENDIX KING KX 165A Page 4 18 15610M00 RCD Rev 0 Jun 2000 Figure 4 6 Glideslope ...
Страница 26: ...BENDIX KING KX 165A Page 4 22 15610M00 RCD Rev 0 Jun 2000 Figure 4 8 CPU Block Diagram ...
Страница 28: ...BENDIX KING KX 165A Page 4 24 15610M00 RCD Rev 0 Jun 2000 Figure 4 9 Front Panel and Display Diagram ...
Страница 29: ...BENDIX KING KX 165A Rev 0 Jun 2000 15610M00 RCD Page 4 25 Figure 4 10 Power Supply Block Diagram ...
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Страница 53: ...BENDIX KING KX 165A Page 5 4 15610M00 RCD Rev 0 Jun 2000 FIGURE 5 1 TYPICAL TEST EQUIPMENT SETUP ...
Страница 54: ...BENDIX KING KX 165A Rev 0 Jun 2000 15610M00 RCD Page 5 5 FIGURE 5 2 BENCH TEST HARNESS SHEET 1 OF 2 ...
Страница 55: ...BENDIX KING KX 165A Rev 0 Jun 2000 15610M00 RCD Page 5 7 Figure 5 2 Bench Test Harness Sheet 2 of 2 ...
Страница 155: ...BENDIX KING KX 165A Rev 0 Jun 2000 15610M00 RCD Page 6 7 Figure 6 1 Sample Parts List Sheet 1 of 3 ...
Страница 156: ...BENDIX KING KX 165A Page 6 8 15610M00 RCD Rev 0 Jun 2000 Figure 6 1 Sample Parts List Sheet 2 of 3 ...
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Страница 283: ...BENDIX KING KX 165A Rev 0 June 2000 RCD 15610I00 Page 6 191 Figure 6 27 Glideslope Assembly Dwg No 300 09447 0000 rev A ...
Страница 290: ...BENDIX KING KX 165A Rev 0 June 2000 RCD 15610I00 Page 6 199 Figure 6 28 Glideslope Board Dwg No 300 09060 0000 rev B ...
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Страница 296: ...BENDIX KING KX 165A Rev 0 Jun 2000 15610M00 RCD Page S 3 FIGURE S 1 KX 165A 069 01033 0101 SW ID 0106 ...
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