User's Manual

T6T VHF 100 W Transmitter Page 22 Installation
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Chassis Stud Connection
A chassis stud is fitted to the transmitter's rear panel. This stud is used to connect the
equipment to the equipment cabinet, or to the user's system earth point. The stud must not
be used as the safety earth.
In order not to compromise the transmitter’s Electromagnetic Compatibility (EMC) the chassis stud,
marked and fitted to the rear panel must be connected to the equipment cabinet (if a cabinet is being
used) or to the user's system earth point. The connection should be made using a single tri-rated, green-
and-yellow cable having a cross-sectional area of 2.5 mm
2
. The cable should have CSA and UL1015
approval, and be connected to the chassis stud through an M6 eyelet (for example, Park Air part number
20-08010103).
Failure to comply with this instruction could result in non-compliance with the European
Commission EMC Directive 89/336/EEC.
Connect the Antenna
The antenna connector is an N-type socket suitable for connecting a 50 ohm antenna.
Connect the DC Input Supply
The transmitter operates from either an ac, or a dc input supply. When both ac and dc are connected,
operation from the ac supply takes priority; automatic change-over to the dc supply occurs if the ac
supply fails. On restoration of the ac supply, the equipment reverts to ac operation.
The dc input supply connectors (see Fig 12) are fitted to the transmitter rear panel. The recommended
minimum rating of the dc supply cables is: 2-core having a cross-sectional area of 1.5 mm
2
per core. The
supply cables should be fitted with XLR 3-pin connectors (Park Air part number 20-01030106).
Fig 12 DC Connectors
WARNING Chassis Earth
Positive Negative
Not used
Pin-out of DC connector looking
into the mating face of the chassis
mounted socket.