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R (f) Ground clutter suppression (item 4)
R Activation of the GND CLTR SPRS switch, in weathers modes (WX,
R WX+T, TURB), reduces the intensity of the ground clutter.
R These ground returns are replaced by black areas on the radar
R image when the GND CLTR SPRS switch is placed in ON position.
**ON A/C 301-302,
(c)
Gain control (item 1) The GAIN potentiometer enables the manual control of transceiver sensitivity in the WX, WX+T, TURB and MAP modes. Clockwise rotation of the GAIN potentiometer increases the gain towards the MAX position. When the potentiometer is rotated fully clockwise, the CAL position provides preset calibrated transceiver gain level (minimum receiver sensitivity). In the CAL 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.
(e)
PWS/AUTO/OFF switch (item 2) 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 1EFF : 106-149, 301-302, 1 34-41-00Page 66 1 1 Config-3 May 01/05 1 1 1CES 1
(f) Ground clutter suppression (item 4) Activation of the GND CLTR SPRS switch, in weathers modes (WX, WX+T, TURB), reduces the intensity of the ground clutter. These ground returns are replaced by black areas on the radar image when the GND CLTR SPRS switch is placed in ON position.
R **ON A/C 303-399, 401-499,
(c)
Gain control (item 1) The GAIN potentiometer enables the manual control of transceiver sensitivity in the WX, WX+T, TURB and MAP modes. Clockwise rotation of the GAIN potentiometer increases the gain towards the MAX position. When the potentiometer is rotated fully clockwise, the CAL position provides preset calibrated transceiver gain level (minimum receiver sensitivity). When the GAIN potentiometer is the CAL position, no indication appears in the R lower corner of the NDs. When the GAIN potentiometer is in a position other than CAL, the MAN GAIN indication is displayed in white. In windshear mode, the gain control is automatic for the WR/PWS 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 (TILT), selected on the radar control unit, is displayed in cyan in the R lower corner of the ND in this form: MAN +/-XX.X.. If the antenna elevation angle 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 control is automatic for WR/PWS scanning. In windshear mode, the tilt indication on the NDs is replaced by the green PWS SCAN indication.
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本文链接地址：A320飞机维护手册 AMM NAVIGATION 导航3(41)
