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

Switching unit


This unit is used for the computer controlled switching of RF signals in the frequency range DC … 18 GHz.


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

-    relays SP4T, SP10T
-    I/O boards
-    processor board
-    IEEE488 interface

All the necessary interface, power supply and earthing connections are provided at the rear.
The mains switch and the signal connection of the relay switches are located on the front panel.


The unit is controlled via an IEEE488 interface.

Special features

T the I/O boards are monitored in a processor routine.
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:4 switches SP4T
1 switch SP10T
with internal termination
Switching specifications
Impedance (Ohm):50
Frequency range (GHz):
DC … 4 (18)
DC … 6 (18)
Insertion loss (dB):
0.2 max.
0.3 max.
(0.5 max. at 18 GHz)
1.0 max. at 18 GHz)
1.25 : 1 max.
1.4 : 1 max.
(1.5 : 1 max. at 18 GHz)
(1.8 : 1 max. at 18 GHz)
Isolation (dB):60 min.
Input power (W):2 CW
Switching elements:failsafe relays
Switching time (ms):
20 max.
25 max.
Switching cycles:1 million min.
Further specifications
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 und EN 50082-1/2
Height3 RU
Depthabout 420 mm (without connectors)
Front panel:painted light grey (RAL 7032)