TECHNISONIC INDUSTRIES LIMITED
TDFM-9200 Installation Instructions
TiL 13RE472 Rev. B
2-17
B.
Determine if the image frequency for the VHF Comm falls within the range of the TDFM-
9200. If so, select a set of frequencies that will cause the TDFM-9200 to be set as close
as possible to the image frequency. Any one of the many possible sets will suffice.
Record those values in the spaces provided in the following chart. Modulate the TDFM-
9200 transmitter on the following frequencies for at least 20 seconds. Listen for any noise
or detected audio signals on the VHF comm.
Example - Bendix/King KY 196A:
The first IF frequency is 11.4 MHz. The L.O. is above the received frequency (high side
injection); therefore, the image frequency is 22.8 MHz above the selected frequency. Set
the KY 196A to 120.000 MHz and the TDFM-9200 to 142.8000 MHz.
FREQUENCIES
RESULTS
VHF #1
TDFM-9200
PASS
FAIL
135.975
136.0000
121.150
157.5000
131.250
157.5000
118.000
34.000
118.000
45.000
Image:
FREQUENCIES
RESULTS
VHF #2
TDFM-9200
PASS
FAIL
135.975
136.0000
121.150
157.5000
131.250
157.5000
118.000
34.000
118.000
45.000
Image:
