Honeywell Bendix/King KX 165A Maintenance Manual page 39

BENDIX/KING KX 165A
The KX165A has an internal VOR converter that can convert the VOR receiver composite to bear-
ing/radial information. The nav composite signal routes to a 9960Hz bandpass filter, U1015C.
The signal is "squared up" and fed to a phase-lock loop, U1003. The PLL demodulates the 9960
Hz composite in order to extract the 30 Hz reference which is then directed to the microprocessor
for signal processing.
The composite signal also routes to anti-aliasing filters (lowpass filters), U1004-C&D before it is
fed to the microprocessor to be converted to bearing/radial information. The lowpass filters have
a 3dB bandwidth of about 1kHz.
The composite signal also is fed to U1015-A where its level is adjusted so that it can be set to drive
external converters.
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