OFF. Removes power from the
CHALS, lowband, and remaining mission equipment.
When the GRFA transmit (XMIT)
mode is selected the GRFA will
transmit RF energy, regardless of the
position of the WOW switch. The
position of the WOW switch only
determines the level of power that
will be radiated by the GRFA.
Weight-on-wheels override switch. The
weight-on-wheels override switch is placarded WOW
OVERRIDE ON OFF. A weight-on-wheels sensor
provides an indication to the Guardrail Radio Frequency
Assembly (GRFA) of whether the aircraft is on the ground
(WOW active) or airborne (WOW inactive). When WOW
is active, modes which would cause RF energy to be
radiated by the GRFA are physically reduced to radiate
RF energy at the low power level when TRANSMIT mode
is selected through the MFD.
ON. Overrides the WOW sensor and
allows the operator to transmit RF energy at the high
power level while the aircraft is on the ground.
OFF. Turns off the override function
of the WOW sensor,
transmitting RF energy at the high power level while the
aircraft is on the ground.
Three-phase AC bus cross tie switch. The
three-phase AC bus cross tie switch, placarded 3f AC
CONTROL BUS CROSS TIE ON/AUTO OFF, controls
the AC bus cross tie.
ON/AUTO. In the ON/AUTO position
the AC busses will automatically be connected if an
OFF. In the OFF position the AC
busses will not be connected (no cross-tie).
Three-phase AC inverter control switches.
Two three-phase AC inverter control switches, placarded
3f AC CONTROL # 1 and # 2 INV RESET ON OFF,
control operation of the three-phase inverters.
RESET. When an inverter is off-line due
either to a fault or to placing the inverter switch to the
OFF position, the affected unit cannot have its output
restored until the inverter switch is moved to the spring
loaded RESET ON position.
ON. ON position selects inverter
OFF. OFF position turns off inverter.
Three-phase AC external power switch.
The three-phase AC external power switch, placarded
3fAC CONTROL EXT PWR - RESET - ON - OFF,
controls application of external three-phase AC power to
RESET. The AC external power
switch must be moved to the spring loaded RESET
position, then to the ON position to bring AC external
power on line.
ON. ON position applies AC external
power to the three-phase busses through the AC external
power receptacle under the left wing.
OFF. OFF position removes AC
external power from the three-phase busses.
Three-phase AC meter switch. The three
phase meters switch, placarded METERS Af - Bf - Cf
controls which phase of the three-phase inverters is being
measured by the AC voltage, frequency, and loadmeters.
ASE control switch. The ASE control
switch, placarded ASE SILENT NORM OFF, controls
operation of the ASE.
SILENT. When the SILENT position
is selected, the transmitting elements of the ASE are
placed in a passive mode.
NORM. The NORM position allows
normal ASE operation.
OFF. The OFF position removes
power from ASE equipment. When the ASE control
switch is set back to NORM, the originally selected mode
will again become active.