Power Requirements - Honeywell CAS-100 Maintenance Manual

CAS-100 COLLISION AVOIDANCE SYSTEM
(q) If the ADS-B program pin is strapped as part of the installation approval process, the
use and display of passive/ADS-B data must be validated. Part of this process will
include:
1 Ensure that the existing displays which do not process the DTIF output do still
correctly receive and process the standard TCAS traffic file.
2 The consolidation and symbology associated with the DTIF must be approved and
certified.
(r) The TCAS processor also supplies communication interfaces with the following
optional units:
1 Flight recorder
2 CFDS or maintenance computer
3 ATE equipment
4 Data loader.
(s) The transmitter and receiver of the TCAS processor are calibrated automatically
during power up, initiated functional test, and periodically. The calibration adjusts for
phase shifts added by the cables, relative phase error in the receiver circuitry, and
temperature effects.
(t) TCAS processors contain an Antenna System Built-In Test Equipment (BITE) test that
operates when power is applied to the TCAS processor. The first function of the
Antenna System test is to detect the correct input impedence to each element of the
top/bottom directional antenna. The second function is to interrogate the
performance characteristics of the antenna. The test measures phase coupling
differences between elements J2 & J4 and J1 & J3. Failure of this test requires
removal of the antenna.
(4)

Power Requirements

The TCAS processor receives 115 V 360-800 Hz or 28 V dc primary power and 26 V ac
synchro reference input power from the aircraft power sources.
CAUTION: TO ELIMINATE RISK OF DAMAGE TO EQUIPMENT, 28 V DC AND
400 HZ CANNOT BE SUPPLIED TO THE TPA-100A AT THE SAME
TIME.
Use or disclosure of information on this page is subject to the restrictions in the proprietary notice of this document.
MAINTENANCE MANUAL
34-45-47
Page 50
1 Dec 2003