Quick Installation Guide
Document
WERA4-Quick-US-200917
Page 13 of 73
4.10.3 WERA-RER - Receiver Rack (8 channels)
Figure 14:
RER Block Diagram for 8 channels
The receiver rack holds the input filters and receiver modules of up to 8 channels.
For a system with 16 receive channel you always need two receiver racks, each containing
8 receiver.
4.11.1 Receive-Input-Filter - RIN (for 12 channels)
– external Filter Version
20V supply voltage
cal signal for
internal calibration
antenna input
Figure 15:
RIN Module
Each RIN module contains a band-pass input filter as well as the relays for the internal
calibration. The filter is designed for a specific frequency and bandwidth to provide
optimum noise reduction.
In addition to that these modules contain two lightning protection stages. The first stage is
a 350 V surge protector and the second stage consists of 4 switching diodes which get
conducive in case of an overload at the filter output. The system will operate even with
burned fuses but with reduced signal levels at these channels.
If a different operating frequency is needed, the RIN modules have to be exchanged.
+9 ±1dBm