-
the suppression of the radar image on the NDs when these NDs are in the ARC or ROSE mode.
R **ON A/C 051-099, 106-149, 201-299, 301-399, 401-499,
(b) System selection and start up: 1/OFF/2 switch (item 6) This switch enables:
-
the selection and activation of the transceiver 1 or 2 (if the second transceiver is installed),
-
the suppression of the radar image on the NDs when these NDs are in the ARC or ROSE mode.
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R **ON A/C 151-199,
R (b) System selection and start up: 1/OFF/2 switch (item 1)
R This switch enables:
R - the selection and activation of the transceiver 1 or 2 (if the
R second transceiver is installed)
R - the suppression of the radar image on the NDs when these NDs
R are in the ARC or ROSE mode.
R **ON A/C 001-049, 051-099, 101-105, 151-199, 201-299,
(c) Gain control (item 5)
The GAIN potentiometer enables the manual control of transceiver
sensitivity in the WX, WX/TURB and MAP modes.
When the potentiometer is rotated fully counterclockwise, the
AUTO position provides preset calibrated transceiver gain level
(maximum receiver sensitivity). Clockwise rotation of the GAIN
potentiometer increases the gain towards the MAX position.
In the AUTO position, no indication appears in the R lower corner
of the NDs. For the other positions, the MAN indication is
displayed in white.
In the windshear position, the gain control is automatic in the
WR/PWS for the scanning.
(d) TILT control (item 3)
The TILT selector switch enables the variation of the antenna
elevation angle in 1/4 deg. steps on a non-linear scale graduated
in degrees, within a range of +15 deg. (UP) to -15 deg. (DOWN) in
relation to a horizontal plane defined by the stabilization
system.
This antenna elevation angle is displayed in cyan in the R lower
corner of the ND and progresses in steps of 0.25 deg.
If the antenna position is different from the TILT selector
switch position, a red ANT failure warning message replaces the
TILT indication in the R lower corner of the ND. In windshear
mode, the tilt is automatic and the tilt displayed on ND is
always the selection on the radar control section although
different in the antenna.
In the windshear position, the tilt control is automatic in the
WR/PWS for the scanning. However, the tilt displayed on ND is in
accordance with the one selected on the radar control unit.
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(e) WINDSHEAR/AUTO/OFF switch (item 4)
In AUTO position, the windshear detection is automatic if
altitude is lower than 2300 ft and qualifiers A and B are valid.
This automatic operation can be inhibited when the switch is in
the OFF position.
R **ON A/C 106-149,
R (c) Gain control (item 1)
R The GAIN potentiometer enables the manual control of transceiver
R sensitivity in the WX, WX+T, TURB and MAP modes.
R Clockwise rotation of the GAIN potentiometer increases the gain
R towards the MAX position.
R When the potentiometer is rotated fully clockwise, the CAL
R position provides preset calibrated transceiver gain level
R (minimum receiver sensitivity).
R When the GAIN potentiometer is the CAL position, no indication
R appears in the R lower corner of the NDs.
R When the GAIN potentiometer is in a position other than CAL, the
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