Northern Airborne Technology CC250 - Manual (Page 13)

CC450-0V2 Communications Controller
Installation and Operation Manual
shares no path with any electrically noisy aircraft accessories such as blowers, turn and bank instruments
or similar loads. Power to this unit must be supplied from a separate circuit breaker or fuse (fast blow),
and not attached to any other circuit breaker without additional protection. Verify that the selected circuit
breaker size and wire gauge are adequate for the installation using the techniques specified in
AC41.13-1B Change 1, Paragraphs 11-47 through 11-51 and 11-66 through 11-69.
Microphone signals run through the CC450-0V2 unit. If the controller is removed, a Dummy Plug
(included with the Installation kit) must be installed on the harness plug P101. Failure to install the
Dummy Plug will prevent transmitting from all transceivers connected to the CC450.
Ensure proper antenna ground plane and sufficient antenna spacing between transceivers that will be used
in RELAY operation. If enough power is transmitted from an adjacent antenna to the receiving transceiver's
antenna, the receiver may stop functioning. Spurious receiver responses from transceivers with weak front
ends, such as handheld units, will also be minimized with proper ground plane and antenna spacing.
2.4.4 Post-Installation Checks
2.4.4.1 Voltage/Resistance Checks
Do not attach the CC450-0V2 until the following conditions are met.
Check the following:
a) P101 pin <18> for appropriate lights voltage.
b) P101 pin <19> for +28 Vdc relative to ground.
b) P101 pins <4>, <8>, <12>, <23>, <27>, and <31> for shield ground (below 0.5 Ω).
c) P101 pins <35>, <36> and <37> for continuity to ground (less than 0.5 Ω).
d) P102 pin <14> for chassis ground (less than 0.5 Ω).
2.4.4.2 Power On Checks
Power up the aircraft’s systems and confirm normal operation of all functions of the CC450. Refer to
Section 3 (Operation) for specific operational details.
WARNING:
High volume settings can cause hearing damage.
Set the headset volume control to the minimum volume setting prior to
conducting audio tests and slowly increase the headset volume to a
comfortable listening level.
Upon satisfactory completion of all performance checks, make all required log book entries, electrical
load, weight and balance amendments and other documentation as required by your local regulatory
agency before releasing the aircraft for service.
Section 2 Rev: 1.00 Issue 1 Page 2-3
ENG-FORM: 805-0114.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.