Modules
R&S
®
OSP
103
User Manual 1178.7100.02 ─ 05
Figure 3-71: Representation of the module on the control screen, with 1 or 2 relays
3.30
R&S
OSP-B119 RF Switch Module
Figure 3-72: R&S
OSP-B119
The one-slot
OSP-B119 (order no. 1515.5856.02) consists of 1
SP8T relay and 2 failsafe SPDT relays, all electromechanical, frequency range
DC to 18
GHz, with non-terminated SMA (female) connectors.
Note:
56 N
·
cm
for
SMA
connectors.
SPDT
relays:
The relays operate independently from each other. The terminal port is labeled with C
(common), the other relay ports are labeled with NC (normally closed) and NO (nor-
mally open). Terminal C is connected either with relay port NC or NO.
The type of relays is monostable (or "failsafe"), hence, with no voltage applied, an RF
connection is provided from C to NC, while NO is not connected to C ("Pos = 0"). To
disconnect NC and connect C to NO ("Pos = 1"), a continuous voltage must be applied
to the relay.
The relays are mounted directly into the module's panel and soldered to the module's
printed board, to avoid relay cabling and allow a compact module size.
SP8T
relay:
R&S
OSP-B119 RF Switch Module