Installation Maintenance Manual
FMHPA 82166
2-4
Jul 2008
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THALES AVIONICS Ltd. This document and any
information included are the property of Thales Avionics.
They cannot be reproduced, disclosed or utilized without the
company’s prior written approval
communication with the SDU to continue. This STBY mode can be obtained with four
configurations:
• Command configuration: In this case, an input command, Carriers Off/
Mute command from SDU, enable or disable the STBY mode
• Auto-protection configuration: When FMHPA detect an internal failure
(High level) and the SDU doesn’t answer within 2 seconds
• With carriers Off/Mute, the main characteristic of the mode is to have a
high isolation between FMHPA input and FMHPA output
• After HPA Power-On Self Test (POST) or at the end of a self test.
e.
BITE Monitoring
A monitoring Mode is defined in order to check if the FMHPA Status is OK or FAIL.
A self test is carried out at Start-up and on request from the SDU.
D. HPA Module
The HPA function is to amplify modulated signals from the SDU, up to 35 W.
The HPA includes an amplification chain, a digital part for control and communication
and a RF filter.
The output RF filter is a mechanical filter, without any electronic component, with a N
connector output.
E.
PSM and CM Module
The PSM and CM SRU module contains two modules in the same housing:
• Power Supply Module
• Communication Module.
