R&S OSP Instrument Functions
Operating Manual 1505.3896.12 - 14 102
When the module OSP-B131 is configured within the OSP120, a manual operation of
the module can be performed via the OSP Panel. See chapter 3.3 for details.
For remote control operation see chapters 6 and 7.
Depending on the required switching application, several modules of the OSP-B131
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.
5.2.13 RF Switch Module R&S OSP-B129 and R&S OSP-B119
The module R&S OSP-B129 is designed as a universal switching module using one
terminated SP8T relay and two SPDT relays.
The module is designed for independent control of all relay.
The relay is a failsafe type. In case of the SP8T relay, 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.
In case of the SPDT relay, a RF connection is provided from the terminal C (Common)
to the position NC (normally closed) with no voltage applied to the relay. To maintain a
RF connection between the terminal C (Common) and the position NO (normally
open), a continuous voltage is to be applied to the relay.
Note that for the SP8T relay only one out of the eight terminals is allowed to be
activated at the same time. When operating the OSP-B129 inside the OSP, the OSP
firmware takes care for correct switching of the SD8T relay.
Figure 5-40: Module R&S OSP-B119 and R&S OSP-B129
All relays are mounted directly in the OSP-B129 front panel. All the RF connectors are
SMA female types. All relays are connected via a short cable to a printed circuit board;
this way the module is of compact size.
The OSP-B129 module is supplied with power and controlled from the OSP120 via a
single connector on the OSP-B129 printed circuit board. The connection to the
OSP120 is done via one connection cable.
The OSP-B129 module is equipped with a on board memory to store the necessary
configuration data of the module.
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