Your contact partner for this product is: Michael Hirschmueller ǀ +49 9078 9695-95 ǀ



The switching unit is used for the processor controlled switching of microwave signals in the frequency range 3.4 … 4.2 GHz.


The switching unit is housed in a 6 U 19“ subrack with very good RF shielding and consists of the following sub-assemblies:

-    relay switches SP6T, wired to SP21T
-    I/O boards
-    processor board
-    RS-485 interface
-    manual control module

All the necessary signal, power supply and earthing connections are provided at the rear.
The mains switch is located on the front panel.


The unit is controlled via a RS-485 interface and via a manual control module with a LC display and pushbuttons which is integrated on the front panel.

Special features

The I/O boards are monitored in a processor routine.
The selected crosspoints as well as the I/O fault messages are displayed on the manual control module.
A status string can also be requested at any time via the control interface.
The unit is constructed using a modular approach utilising 19” plug-in sub-assemblies which enable ease of installation and maintenance.

Technical datameasured at 25 °C
Configuration:3 switches SP21T
with internal termination
Switching specifications
Impedance:50 Ohm
Frequency range:3400 … 4200 MHz
Insertion loss:1.0 dB max.
VSWR:1.4 : 1 max.
Isolation:60 dB min., 80 dB typ.
Switching elements:failsafe relays
Switching time:25 ms max.
Switching cycles:1 million min.
Further specifications
Manual control:LCD (4x20) and pushbuttons (3x6)
RF connectors:SMA female, 50 Ohm
Power supply:195 … 264 VAC, 47 … 63 Hz
Connector3-pin, with mains filter and fuses
Mains switch:with integrated lamp
Temperature range:
Operating0 … 50 °C
EMC:in accordance with European standard EN 55022 and EN 50082-1/2
Height6 RU
Depthabout 360 mm (without connectors)
Front panel:painted light grey (RAL 7032)