Becker Rhotheta SAR DF 517 User manual

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with the Becker and G1000
with the Becker and G1000

Becker SAR DF 517
Becker SAR DF 517
System Components
System Components
Control-Display Unit (CDU)
Antenna-Receiver Unit (ARU)
Two Primary components

Becker SAR DF
Becker SAR DF- -517 517
•The Becker SAR DF-517 is an automatic
direction finder. It supports 121.5, 156.8, 243
and 406 MHz frequencies
•The DF unit will display a bearing relative to the
nose of the aircraft for signals received
•There are two sets of frequencies that may be
selected. These are Emergency Mode or
Training Mode frequencies
•The Emergency Mode or Training Mode can
only be selected at power up

Power Up
Power Up
•If your aircraft is equipped
with Mission Master it must be
on for DF to operate
•On power up (1), verify
Emergency or Training mode.
To change the setting, turn
the page dial (2) and select
the appropriate mode (3).
Note: this option is only
available for the first 10
seconds after power up

Initial Setup
Initial Setup
•The Page dial (2) is
used to switch the
DF-517 between the
different pages
•By holding the Rep
button and rotating
the page dial (1) the
brightness can be
adjusted

DF
DF- -517 517 DFing DFing
•Select the desired frequency to
DF by using the bottom right
rotary dial (1) to select the
desired preprogrammed
frequency
•Use the volume (2) rotary dial to
set the volume level
•Once the desired frequency is
selected, use the SQL (3) dial to
select the squelch level

DF
DF- -517 517 DFing DFing cont. cont.
•The DF signal can be heard by selecting
the AUX monitor toggle on the audio panel
•DFing is done using Page 1 or Page 2
•Page 1 displays a full circle with the signal
and bearing in 360o(this page is preferred)
•Page 2 displays a 90owindow with the
relative bearing and signal

DF
DF- -517 517 DFing DFing cont. cont.
•(1) The signal and
relative bearing
•(3) Signal Strength
•(4) Squelch level
•Tracking frequency
406.025 in Emergency
mode
•Note that to DF a signal,
the squelch level must be
below the maximum
signal strength
DF-517 Page 1 Display

DF
DF- -517 517 DFing DFing cont. cont.
•(1) Signal level and
relative bearing
•(2) Position error
•Tracking Freq.
121.650 in Training
Mode
DF-517 Page 2 Display

DF
DF- -517 frequencies 517 frequencies