PRIMUS
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1000 Integrated Avionics System
A28--1146--112--00
PRIMUS
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660 Weather Radar System
B--8
STC reduces the receiver gain at the start of the trace, and then
increases it as the more distant returns are received. With STC, a
uniform display of cell strength is displayed for both near and distant
cells.
The variable (VAR) legend annunciates variable gain. Selecting RCT,
or TGT forces the system into preset gain. Preset gain is not
annunciated.
Normal Operation
PRELIMINARY CONTROL SETTINGS
Place the MODE control, GAIN control, and TILT control, as shown
below, before powering up the aircraft electrical system.
MODE Control:
Off
GAIN Control:
Preset Position
TILT Control:
+15
PRECAUTIONS
If the radar system is operated in any mode other than standby, while
the aircraft is on the ground, follow the precautions given in table B--3.
Step
Precautions
1
Direct nose of aircraft so that antenna scan sector is free
of large metallic objects (such as hangars or other
aircraft), for a minimum distance of 100 feet, and tilt
antenna fully upwards.
2
Do not operate during aircraft refueling or during refueling
operations within 100 feet.
3
Do not operate if personnel are standing too close to the
270
_
forward sector of aircraft. (Refer to Maximum
Permissible Exposure Level (MPEL) in this appendix.)
4
Operating personnel should be familiar with FAA AC
20--68B, that is referenced in Honeywell Pub. No.
28--1146--120.
PRIMUS
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660 Weather Radar System Precautions
Table B--3
