3.1.2. Interconnect Pin-outs From Power Supply and Aircraft
The cable harness from the Power Supply to the aircraft can be fabricated from
standard 22 AWG aircraft wire (e.g., M27500 twisted shielded pair). If the harness to
the Power Supply is longer than 12 feet, a larger AWG size is recommended (video coax
excluded).
Notes:
1. A discrete input (ZOOM_IN) is provided to control the field of view (FOV)
switching function as follows:
a. Left open or grounded to 0 volts (< 2 volts), the wide angle, 53°, FOV is
selected.
b. Held at 28 volts (> 7 volts), the narrow angle, 30°, FOV is selected.
2. The 28 V discrete input is provided to control the Non-Uniform Correction (NUC)
function as follows:
a. Left open or grounded to 0 volts (< 2 volts), NUC automatically occurs at
programmed intervals.
b. On transition from 0 to 28 volts (> 7 volts), one NUC cycle occurs and
then further NUC cycles are inhibited until the input goes back to 0 (< 2
volts).
c. On transition from 28 to 0 volts (< 2 volts), one NUC cycle occurs and
then further NUC cycles automatically occur at programmed intervals.
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