TN910 Rev 5-0-0 May 14
TN910 Codan MT-3 and IFR COM-120 Test Procedures
MT-3 Radio Systems
TECHNICAL NOTES
Page 3 of 16
© 2014 Codan Limited All rights reserved.
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Victoria, B.C.
Canada V8V 1P8
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Phone: 1-800-664-4066
Fax: 1-877-750-0004
International
Phone: 250-382-8268
Fax: 250-382-6139
Internet
Email: LMRsales@codanradio.com
Web: www.codanradio.com
General Set-Up and Connections
Frequencies and Bandwidths:
The receiver and transmitter modules are individually programmed with RF frequencies and are also designed for
wideband or narrowband operation. Familiarize yourself with all of the transmitter and receiver settings before
testing or tuning the Codan radio system.
Typical Specifi cations:
This document refers to some TYPICAL receiver and transmitter specifi cations. Refer to the Instruction Manuals
for complete radio system specifi cations.
Adapters, Cables and Extender Cards:
Various adapters, cables and extender cards are required for the different radio tests. Extender cards and adapters
are available from Codan Radio Communications. The receiver front end fi lter tuning requires an SMB - BNC
adapter (5192-WJ01BJ01) that is available from Codan Radio Communications.
Control Cards:
Most Codan MT-3 radio systems have an AC-3E or AC-3L-96 Audio Control Card for use in the radio system. The
Control Cards connect to the receiver and transmitter balanced audio lines with an unbalanced load, which could
cause some measurements to be in error. If the radio system includes an Audio Control Card, remove the control
card from the rack for the individual receiver and transmitter tests unless otherwise noted.
Audio Connections:
The Receiver, Transmitter and Auxiliary Balanced audio lines are available for connection on Codan extender cards
or by connecting to the optional back panel A-PNL-AUX96-3 screw-type terminal connector. The extender cards
have solder points available on each signal line that can have a small test point, (5059-TP110300) that is supplied
with the extender card, soldered to them for easy connection with clip-on type clips. Recommended Test Points are:
Audio Control Card Extender Card pins (EC-96D1 and EC-96K-1.22):
Auxiliary 1 Audio Output = B11 & A11
Auxiliary 2 Audio Output = C1 & C3
Auxiliary 1 Audio Input = C19 & C20
Auxiliary 2 Audio Input = B14 & A14
Receiver and Transmitter Extender Card pins (EC-48RD and EC-48RK-1.22):
Rx Balanced Audio Output = B26 & Z26
Tx Balanced Audio Input = B18 & Z18
Tx Subtone Input = B22 & Ground (B32)
This product has been discontinued and is no longer manufactured by Codan Radio Communications
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