User's Manual

FLITELINE AVIONICS SYSTEM

PILOT’S GUIDE

Publication No. 150-047012 Page 37

Rev. D Dec 2005

CDF-552 Controls (Series III and FliteLine Interface continued…)

CHELTON

ADF

PWR

L 15

ACT

ADF BFOBRG



190.5

MODE

VOL

TUNE

Outer Knob

Mode Selector Continued…

BFO - (Beat Frequency Oscillator)

Identical to ADF mode, but adds a 1,000-Hz tone to

audio.

Used only to identify interrupted-carrier signals (also

known as cw).

CHELTON

ADF

PWR

L 15

ACT

TST ADFANT



190.5

MODE

VOL

TUNE

Outer Knob

TST - Test Mode

1. Sends a park-at-90° command to external

indicators.

2. Displays the letter L along with a number in

Standby Frequency window, used for

maintenance purposes.

3. Pressing the WHOLE/HALF KHZ button in this

mode interrupts the park-at-90° command and

provides station relative bearing to external

indicators. Simultaneously, the lower line of the

display will indicate the same relative bearing

digitally to the nearest tenth of a degree.