TruTrak Pictorial Pilot - Manual (Page 5)

create a periodically pulsating magnetic field disturbance. Shielding has no effect on this problem; the only solution is to keep
strobe light wiring as far away as possible from any electronics which can be affected by pulsating magnetic fields.
RFI/EMI considerations
The autopilot programmer is shielded and does not generate any appreciable level of electromagnetic interference. Moreover,
the servo lines (except for power and ground) are low-current and cannot contribute to RF interference. The servo power and
ground lines do have switching currents through them, but so long as there are no parallel runs of servo power and ground lines
with such things as poorly-shielded antenna lines or strobe light power lines, there is no need to shield the servo harnesses.
The autopilot itself has been internally protected from RF interference and has been tested under fairly extreme conditions,
such as close proximity to transmitting antennas. However, it is always good practice to insure that such antennas are properly
shielded and not routed directly over or under sensitive panel-mounted electronic equipment. Most problems in this area are the
result of improper RF shielding on transmitting antennas, microphone cables, and the like. The most sensitive input to the
autopilot is the Control Wheel Switch input. This line should not be routed in parallel with transmitting antennas or other
sources of known RF interference. If necessary, it can be shielded with the shield connection to pin 8 of the autopilot
connector.
Pictorial Pilot 2” cutout
TruTrak Flight Systems Pictorial Pilot Installation & User Guide
December 2009 3 8300-011 Rev B