User's Manual

30 | Product Options
Aprisa SR User Manual
Protected Station
The Aprisa SR Protected Station provides radio and user interface protection for Aprisa SR radios. The RF
ports and interface ports from two standard Aprisa SR Radios are switched to the standby radio if there is
a failure in the active radio.
Example Part:
Part Number
Part Description
APSR-R400-012-SO-12-ETAA
4RF SR, PS, 400-470 MHz, 12.5 kHz, SO, 12 VDC, ET, AA
The Aprisa SR Protected Station is comprised of an Aprisa SR Protection Switch and two standard Aprisa SR
radios. This configuration provides the ability to ‘hot-swap’ a failed radio without interrupting user traffic
on the active radio. Additionally, retains the full temperature range specification of a single radio.
The Aprisa SR radios can be any of the currently available Aprisa SR radio frequency bands, channel sizes
or single / dual antenna port options.
The Aprisa SR Protected Station can operate as a base station, repeater station or remote station. The
protection behavior and switching criteria between the active and standby radios is identical for the three
configurations.
By default, the Aprisa SR Protected Station is configured with the left hand radio (A) designated as the
primary radio and the right hand radio (B) designated as the secondary radio. Each radio is configured with
its own unique IP and MAC address and the address of the partner radio.
On power-up, the primary radio will assume the active role and the secondary radio will assume the
standby role. If, for some reason, only one radio is powered on it will automatically assume the active
role.
Protected Ports
The protected ports are located on the protected station front panel. Switching occurs between the active
radio ports and the standby radio ports based on the switching criteria described below.
The protected ports include:
Antenna ports ANT/TX and RX (if dual antenna ports used)
Ethernet ports 1 and 2
Serial port