Honeywell Bendix/King KX 165A Maintenance Manual page 65

BENDIX/KING
5.2.2.3.9 Ident (This is a manual adjustment located on the main board)
1. Input a standard VOR test signal with modulation of 1020Hz, -73dBm at 30%.
2. Push in the ident switch.
3. Adjust R1096 for a minimum audio output. Requirement is 15 dB of attenuation min-
imum with ident switch out vs in.
5.2.2.4 Comm Transmitter
NOTE:The unit is in the alignment mode for all transmitter alignment steps.
5.2.2.4.1 Power and Modulation
1. In the 10 watt ALIGN page, set output power for 10.8 to 11.2 watts at 118, 127.6,
and 136.8 MHz with no modulation by adjusting TPWR.
2. With audio input of 150 ± 10 mVrms @ 1kHz sinewave and COMPRESOR pot,
COMT, set to 0, adjust modulation for NLT 90% and NMT 95% at 118, 127.6, and
136.8 MHz by adjusting MIC.
3. Raise audio input level to 500 ± 10 mVrms. Adjust COMPRESSOR pot, COMT, for
NLT 78% but NMT 82% modulation at 118, 127.6, and 136.8 MHz.
4. In the 5 watt ALIGN page, set output power for 10.8 to 11.2 watts at 118, 127.6, and
136.8 MHz with no modulation by adjusting TPW5.
5. With audio input of 150 ± 10 mVrms @ 1 kHz sinewave and COMPRESSOR pot,
CMT5, set to 0, adjust modulation for NLT 90% and NMT 95% at 118, 127.6, and
136.8 MHz by adjusting MIC5.
6. Raise the audio input level to 500
for NLT 78% but NMT 82% modulation at 118, 127.6, and 136.8 MHz.
7. In the 2 watt ALIGN page, set output power for 4 ± 0.5 watts at 118, 127.6, and
136.8 MHz with no modulation.
8. With audio input of 150 ± 10 mVrms @ 1 kHz sinewave and COMPRESSOR pot,
CMT2, set to 0, adjust modulation for NLT 90% and NMT 95% at 118, 127.6, and
136.8 MHz by adjusting MIC2.
9. Raise audio input level to 500 ± 10 mVrms. Adjust COMPRESSOR pot, CMT2, for
NLT 78% but NMT 82% modulation at 118, 127.6, and 136.8 MHz.
10. Verify that the temperature offset TOFF has been set properly (typical value is 0).
Set Transmitter Ambient Offset TAOS to -7 for units with glideslope, -4 for units with-
out glideslope.
5.2.2.4.2 Sidetone Level
1. Go to the SIDE page
2. Input a 200mVrms, 1kHz tone into the COMM MIC AUDIO INPUT P165A1-2. See
Figure 5-3.
Rev 0, Jun/2000
±
10 mVrms. Adjust COMPRESSOR pot, CMT5,
15610M00.RCD
KX 165A
Page 5-17