4RF Aprisa XE User Manual - page 81
Configuring the Terminal | 79
Aprisa XE User Manual
Setting the Duplexer Parameters
To set the duplexer parameters:
Select Link or Local or Remote > Terminal > Duplexer
Duplexer Parameters
The terminal TX and RX frequencies entered are validated against the duplexer parameters entered on
this page.
A valid high port frequency must be:
(duplexer high port centre frequency + pass band/2 - channel size/2)
and
(duplexer high port centre frequency – pass band/2 + channel size/2)
A valid low port frequency must be:
(duplexer low port centre frequency + pass band/2 - channel size/2)
and
(duplexer low port centre frequency – pass band/2 + channel size/2)
The duplexer parameters are entered in the factory but can be re-entered if the duplexer is changed in
the field. The parameters required are shown on the duplexer label.
1. Enter the duplexer High port centre frequency and Low port centre frequency in MHz.
2. Enter the duplexer Pass band in MHz (the total passband e.g. if the duplexer passband is show as
± 3.5 MHz, the value entered is 7 MHz).
3. Select Transmit High or Transmit Low
Transmit High - the Transmitter is connected to the High Port of the duplexer.
Transmit Low - the Transmitter is connected to the Low Port of the duplexer.
4. Enter the duplexer Serial Number (used for record keeping only).
5. Click Apply to apply changes or Reset to restore the previous configuration.