R&S OSP Instrument Functions
Operating Manual 1505.3896.12 - 14 93
For remote control operation see chapters 6 and 7.
Depending on the required switching application, several modules of the OSP-B121
type can be installed in one OSP120.
In the OSP frame a maximum of three modules is possible. If more than three modules
are required, the extension unit OSP150 must be used. For further information on the
extension unit OSP150 see chapter 8.2
The description above applies to further options of the R&S OSP as far as the option
has got a similar relay configuration. It will apply to the following modules:
3 x SPDT relay with SMA 2.9 Connectors,
40 GHz, terminated
5.2.8 RF Switch Module R&S OSP-B122
The module R&S OSP-B122 is designed as a universal switching module using
terminated RF relays. The OSP-B122 contains the following relay configuration:
1 x SP6T switch (terminated)
The relay is a failsafe type; i.e. no RF connection is provided from the terminal C
(Common) to one of the six terminals when no voltage is applied to the relay. To
maintain a RF connection between the terminal C (Common) and one of the six output
terminals, a continuous voltage is to be applied to the corresponding power terminal of
the relay.
Note that always one out of the six terminals of the relays is allowed to be activated at
the same time. When operating the OSP-B122 inside the OSP, the OSP firmware
takes care for correct switching of the SD6T relay.
Figure 5-26: Module R&S OSP-B122
The relay is mounted directly in the OSP-B122 front panel. All the RF connectors are
SMA female types. The relay is connected via a short cable to a printed circuit board;
this way the module is of compact size.
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