4RF Aprisa SR+ - Page 141

Managing the Radio | 141
Aprisa SR+ User Manual 1.11.1
GENERAL
Channel Size (kHz)
This parameter sets the Channel Size for the radio (see ‘Channel Sizes’ on page 464 for Radio Capacities).
The default setting is 12.5 kHz.
Antenna Port Configuration
This parameter sets the Antenna Port Configuration for the radio.
Option
Function
Single Antenna
Single Port
Select Single Antenna Single Port if using one or two frequency half
duplex transmission. The antenna is connected to the ANT port.
Single Antenna Dual
Port (duplexer)
Select Single Antenna Dual Port if using:
(1) One or two frequency in half duplex transmission with an external
duplexer (for filtering) connected to the ANT/TX and RX antenna ports
and single antenna connected to the duplexer.
(2) Two frequency in full duplex transmission with an external duplexer
(for full duplex operation) connected to the ANT/TX and RX antenna
ports and single antenna connected to the duplexer.
(3) Single frequency in half duplex transmission with external dual
antennas, connected to the ANT/TX and RX antenna ports.
(4) Two frequency in half or full duplex transmission with external dual
antennas, connected to the ANT/TX and RX antenna ports.
The default setting is Single Antenna Single Port.
RX Path Attenuation (dB)
This parameter sets the receiver front end variable attenuator. The attenuator can be set from 0 to 30.5 dB
in 0.5 dB steps. This attenuator can be used to protect the receiver from strong out of band interference.
The default setting is 0 dB.
This feature is only available on 700 MHz radios.