COBHAM RT-7000 PMR User Manual

150-071724 Rev N
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Page 20 of 138
 Antennas: The RMR has an independent coax output for each installed
transceiver. The coax outputs may be connected to a variety of antennas and/or
switches.
 118 MHz High Pass Filter (HPF): The 118 MHz HPF is designed to add additional
protection from the strong transmitters in the commercial FM frequency band.
This filter protects the Wide Band Transceiver from interference from these
strong transmitters. If the RT-7000 is to be used as a TSO’d VHF ATC COM
radio, the 118 MHz HPF must be installed in the antenna feed between the coax
connector for the Wide Band Transceiver and its antenna. It is expected
Ground/Flight testing, as necessary, will demonstrate the HPF does not prevent
acceptable communications may continue to occur when the additional
attentiation from HPF is present for aircraft airwothiness approval needs.
The RT-7000 Remote control Display unit (RCDU) system consists of:
 Remote Control Display Unit (RCDU): The RCDU is a controller which has the
same display as the RT-7000 PMR with similar control functions, intended to
allow remote control of the RT-7000 PMR and RMR. It is packaged in a chassis
with less depth behind the panel than the PMR.
 The RCDU allows remote operators (e.g. EMTs in the aircraft cabin) to access the
communications features of the 7000 series transceivers excluding ATC on a
PMR. When connected to an RMR the RCDU will feature the ability to access the
ATC communication menu.
5.2 CERTIFIED INSTALLATIONS
For installations that require certification to TSO-C169a and use as a VHF ATC COM,
the following steps must be taken:
- If the aircraft is equipped with an ACARS system, the RT-7000 audio must not be
connected to the ACARS system. The RT-7000 PMR and RMR are designed to be
a VOICE radio only. It does not have data capability and therefore the audio from
the ACARS modem shall not be connected to the RT-7000 microphone input and
the RT-7000 shall not be used to send or receive ACARS data.
- When wiring the RT-7000 PMR or RMR to other aircraft systems, ensure that the
COSITE_TX discrete is connected in the installation. The Cosite_TX to
TX_Interlock connection is required for TSO-C169a Certified Installations. Ensure
that the COSITE_TX discrete (pin 67) is connected to the TX Interlock or
equivalent I/O on other VHF and UHF radios within the aircraft that have a similar
type of TX Interlock discrete.
It is expected that Ground/Flight testing, as necessary, will demonstrate that the
attenuator that is enabled by the COSITE_TX does not prevent acceptable
communications. For aircraft airworthieness approval needs, acceptable
communications may continue to occur when the additional attentiation is present.
- The RT-7000 PMR and RMR were not designed to operate as the main VHF
communication radio in a Part 25 aircraft. The Wideband Transceiver has a Class
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COBHAM RT-7000 PMR Specifications

General

Brand	COBHAM
Model	RT-7000 PMR
Category	Radio
Language	English