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Table 1.6-3. CP-113 Additional Switches Description
Additional Switches
and Controls
Description
TILT UP / DN
The Tilt control is a rotary potentiometer that controls the tilt of the
antenna
±
15
°
. For radar systems that use the DA-1203A, this pot
is hardwired to the DA-1203A.
The Tilt Control of the CP-113K, which is used with the RDR-
1400C radar system (DA-1203A), will be hardwired to the DA-
1203A and will also output ARINC 429 Tilt information. This is
the only CP-113 that will allow both analog and digital tilt control.
PULL STAB OFF
This switch is connected to the Tilt Control knob. When the Tilt
Control Knob is pressed in, then the stabilization function is active.
When this knob is pulled out, the stabilization function is turned off.
(ROLL TRIM ADJ)
This is a recessed pot that will adjust the antenna in the azimuth axis
so that the antenna will scan parallel to the earth when no roll is
applied to the radar system. This is to adjust out any mechanical
errors that may exist between the gyro’s platform and the antenna
drive that is mounted on the bulkhead.
BCN GAIN
The Beacon Gain is a rotary potentiometer that controls the gain of
the Beacon receiver.
SRCH GAIN
The Search Gain is a rotary potentiometer that controls the gain of
the Search receiver.
CODE
Pressing this switch selects Beacon Codes in a sequential cyclic
fashion (i.e. Code 0, Code 1, Code 2, … Code 15 or Code 0, Code
1, Code 2, … Code 9). The selected code is annunciated on the
display.
When DO-172 Beacon (Beacon Mode A) is selected via the BCN
switch, the total of sixteen codes (0-15) can be selected by the Code
switch. Selecting a Standard two-pulse Beacon (Beacon Mode B)
via the BCN switch, the total of ten codes (0-9) can be selected by
the Code switch. The Code button is not active unless the Beacon
mode has been selected.
BRT
This potentiometer controls the brightness of the Multi Function
Display (MFD). The Brightness control has no function within the
CP-113.
(BRT) OFF
This switch blanks the Multi Function Display (MFD). This switch
has no function within the CP-113.
STAB OFF
When the slide switch is in the STAB position the stabilization
function is active. When the slide switch is in the OFF position the
stabilization function is turned off.
