User's Manual

T6T VHF 100 W Transmitter Page 21 Installation
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Fig 11 Example: Using the Antenna Change-over Output
T6T Transmitter
6
5
Facilities
Connector
Antenna
T6T Transmitter
Facilities
Connector
Antenna
9
28 Vdc (nominal)
Control
(Main)
(Standby)
Antenna
Main/Standby
Transmit Relay
Example
This example shows the Antenna Change-over Output configured to control the antenna switching between main
and standby transmitters. The potential on Facilities connector pin 6 is switched through to pin 5 when the standby
transmitter is keyed; in this example, pin 6 is linked to ground. This energizes the Main/Standby Transmit Relay to
route the standby transmitter to the antenna.
Other Configurations
The antenna change-over output can be configured in other ways to suit the user’s requirement subject to:
❑ Pin 6 can be any potential between -60 and +60 Vac, or dc.
❑ The maximum current drawn must not exceed 100 mA.
❑ The output at pin 5 is configurable normally open or normally closed from the Polarities screen.
❑ The internal solid state switch activates 35 ms before the start of the power ramp to allow for the antenna
relay pull-in time.
8
Solid State
Relay
Link