User's Manual

FLITELINE AVIONICS SYSTEM
PILOT’S GUIDE
Page 46 Publication No. 150-047012
Dec 2005 Rev. D
CDF-552 Notes
1. The FREQUENCY SELECTOR knobs tune the radio receiver directly. The display actually shows the
frequencies to which the receiver is tuned. In addition to rotation of the FREQUENCY SELECTOR KNOBS,
the receiver may be tuned by an external ARINC 429 digital bus.
2. Display intensity and panel lighting are controlled by external dimmer controls.
3. If the signal to which the receiver is tuned is lost for longer than 5 seconds, the display pointers will park at
90°.
4. The FREQUENCY SELECTOR KNOBS rotate continuously through all detents without end stops. After the
highest number is displayed, the next detent clockwise will cause the lowest number to be displayed.
5. If the display is not functioning, the system frequency can be established as follows: Press the transfer
button for 7 seconds. The system will then be at 100 kHz (for BCD interface it will be 190 kHz) and it will be
in active tuning mode. Rotating the large frequency selector clockwise will increase the frequency in 100
kHz steps. Rotating the small knob clockwise will increase the frequency in 1 kHz steps.
8. Frequencies selected between 100 kHz to 189 kHz and 1861 kHz to 1899 kHz are invalid and will cause the
display to blink off and on. (except with BCD Interface)
9. Pressing and holding the left pushbutton (PWR) for more than 1 second will trigger the system to shutdown.
A warning screen will display a countdown. Releasing the PWR button before the count has expired will
return the unit to the display screen active prior to initiating the shutdown.
Should the system become unresponsive, a hardware failsafe shutdown can be initiated. Under this
circumstance, press and hold the PWR button for 12-15 seconds. There is no indication other than actual
system shutdown and an audible click.