Mode Switch; Fsby (Forced Standby) - Honeywell PRIMUS 1000 Pilot's Manual

In the slaved conditions, both controllers must be off before the radar
system turns off.
8

MODE Switch

The MODE switch is a rotary switch that is used to select one of the
following functions:
OFF -- Turns the radar system off. An amber WX is displayed in the
D
MFD mode field.
STBY (Standby) -- The radar system is placed in standby, a ready
D
state, with the antenna scan stopped. The transmitter is inhibited,
and the display memory is erased. A green STBY is displayed in the
MFD mode field.
If STBY is selected before the warm--up period is over
(approximately 45 seconds), a green WAIT legend is displayed in
the MFD mode field. When the warm--up period is over, the system
automatically switches to the STBY mode.
FSBY (Forced Standby) -- Forced standby is an automatic,
D
nonselectable radar mode. FSBY mode is a safety feature that
inhibits the transmitter on the ground to eliminate the X--band
microwave radiation hazard. The controller is wired to the
weight--on--wheels (WOW) switch. The RTA is in forced standby
mode when the aircraft is on the ground. In the forced standby
mode, the transmitter and antenna scan are both inhibited, the
memory is erased, and the cyan FSBY legend is displayed in the
MFD mode field. When in FSBY, pushing the STAB button 4 times
within 3 seconds overrides the FSBY mode.
NOTE: When weather radar is displayed on the MFD, forced
standby is dropped once the aircraft is airborne.
WX (Weather) -- Selecting WX places the radar system in the
D
weather detection mode. The system is fully operational and all
internal parameters are set for enroute weather detection.
If WX is selected before the initial RTA warm--up period is over
(approximately 45 seconds), a green WAIT legend is displayed. In
the WAIT mode, the transmitter and antenna scan are inhibited and
the memory is erased. When the warm--up period is over, the
system automatically switches to WX mode and a green WX is
displayed in the MFD mode field.
In preset gain, the system is calibrated as described in table B--2.
A28--1146--112--00
PRIMUSr1000 Integrated Avionics System
â
PRIMUS 660 Weather Radar System
B--5