User's Manual

3-6
3.15 LH DATA, SB9600 BUSY, OPTB+, CTS OUT AND BOOT DIN - PINS 18
THROUGH 22
These pins are used for programming or updating the transceiver using Motorola
Radio Service Software (RSS) and are generally left unconnected. However, if it is
desirable to update the radio without removing it from the aircraft, these lines can be
run to a 25 pin D male connector located on the panel where a laptop computer can
plug in. Use the same pin numbers so the programming cable described in section
2 can be used (minus the power pins).
3.16 PANEL BACKLIGHTING - PINS 25
Connect to aircraft panel dimming bus. The transceiver comes with either 28 VDC
or 5 VAC backlighting circuits.