Filser Electronic GmbH
Gewerbestraße 2
ATR 720 C Communications Transceiver
86875 Waal
page 15
keys (1 – 0 frequency-locations). The memory is maintained even when the unit is switch
off.
CL
CLEAR. Depressing the CLEAR-Key erases the activated frequency. At the same time the
LCD-display is cleared. A new frequency may now be selected.
2.7.2.5 Frequency Display
The frequency is displayed 7 mm’s high on a 5-digit liquid-crystal display.
2.7.3 POST INSTALLATION CHECKOUT
An operational performance flight test is recommended after the installation is completed to in-
sure satisfactory performance of the equipment in its normal environment.
To check the communications transceiver, maintain an appropriate altitude and contact a ground
station facility at a rang of at least fifty nautical miles. Contact a ground station close in. Place the
squelch knob in the test position and listen for any unusual electrical noise which would reduce
the COMM receiver sensitivity by increasing the squelch threshold. If possible, verify the commu-
nications capability on both the HIGH an LOW ends of the VHF COMM band.
