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

Switching unit


The switching unit is employed in the test department and is used for the processor controlled switching of RF and microwave signals in the frequency range DC … 2.4 GHz.


The switching unit is housed in a 3 U 19“ subrack with very good RF shielding and consists of the following sub-assemblies:

-    relay switches SP6T und SP18T
-    I/O boards
-    processor board
-    IEEE488 inteface
-    manual control modul (optional)

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


The unit is controlled via an IEEE488 interface and via a manual control module with a LC display and pushbuttons, located 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:switches SP6T with internal termination
switches SP18T without internal termination
Switching specifications
Impedance:75 Ohm
Frequency range:DC … 2.4 GHz
Insertion loss:2 dB max.
Isolation:80 dB
Switching elements:failsafe relays
Switching time:15 ms max.
Switching cycles:1 million min.
Further specifications
Control:IEEE488 or tbd.
Manual control:LCD (4x20) and pushbuttons (4x20)
RF connectors:1.6/5.6 female, 75 Ohm
Power supply:95 … 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
Height3 RU
Depthabout 360 mm (without connectors)
Front panel:painted light grey (RAL 7032)