INSIGHT STRIKE FINDER Pilot's Manual page 55

STRIKE FINDER
P - Continuously displayed
P channel failure, or
Check sensor cable / connector wiring for conductor PF.
Exchange display and sensor with known good components.
P - Intermittently displayed
This code will disappear and re-appear, randomly. When a real storm cell
is being plotted on the display, a 'mirror image', or ambiguous storm cell will
be plotted, usually with fewer dots than the real storm cell. In
Mode, the activity number will usually be acceptably stable.
Possible loose connection on sensor cable/connector conductor PF.
In most cases, this error code is the result of repetitive voltage noise
being coupled into the sense antenna at a sufficiently high rate and
amplitude to cause interference with the test pulse. This causes the P
channel test to fail intermittently.
Insight Audio Tester
Use the
source, by switching various electrical equipment on, one at a time.
The most common voltage noise sources are DME, transponder, and
navcom.
Ensure that all sensor cable shields are connected to pin 10 of the display's
DB25 connector.
Check DME, transponder, and navcom antenna coax terminations as
indicated.
Check shields, grounds, and power supply filters on relevant interfering
equipment.
54
sense antenna
(P/N 2000-060) to isolate the interference
DIGITAL WEATHER AVOIDANCE
fault.
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PILOT'S GUIDE