User's Manual

TECHNISONIC INDUSTRIES LIMITED
www.til.ca
TFM-550 Installation & Operating Instructions TiL 99RE262 Rev A Issue 8
A-5
C. Determine if the image frequency for the VOR/ILS Nav falls within the range of the TFM-550. If
so, select two sets of frequencies that will cause the TFM-550 to be set as close as possible to
the image frequency. Choose one set in the localizer frequency range and one in the VOR
frequency range. Record those values in the spaces provided in the following chart.
Establish the relative ultimate sensitivity of the ILS receiver using a NAV simulator, then increase
the simulator signal by 17db. Modulate the TFM-550 transmitter on or as close to the following
frequencies for at least 20 seconds. Listen for any noise or detected audio signals on the receiver
audio; look for any movement of flags or needles on the navigation displays.
A placard is required unless the above test is performed and passed. The placard shall read "Use
of the transmitting function of the TFM-550 in the range of 36 to 40 MHz is prohibited during IFR
approach operations.". This placard must be placed adjacent to the TFM-550 and RC-550 (if
installed). The placard must be high contrast, clearly legible and indelible.
Note: Where indicated by an asterisk (*), required action is to switch ATC-550 on and off as often
as necessary.
FREQUENCIES RESULTS
VOR/ILS #1 TFM-550 PASS FAIL
108 36
108 162
108.1 36.0325
108.1 162.15
112 *
Image: