G. AVIONICS FLIGHT CHECKS (CONT)
*12. Encoding altimeter - Check as follows:
Mode C switch (transponder control
panel) - ON.
Contact ground radar facility and
request their altitude readout. Observe
that ground facility altitude readout
agrees with aircraft altitude within ±200
*13. Radar set - Check while airborne as follows:
RADAR system mode selector switch -
Radar receiver GAIN control - Preset
(pushed in) position.
Antenna TILT angle control - +15
Weather (WX) pushbutton selector
switch (display controller) - Depress to
select weather display mode on the
Radar mode selector switch - SBY or
When power is first applied, the radar will be in
the wait mode for 45 seconds to allow the
magnetron to warm up.
RADAR mode selector switch - WX or
Range switches - As required.
Satisfactory operation of the weather
radar shall be verified using 5, 25,