Modules
R&S
®
OSP
115
User Manual 1178.7100.02 ─ 05
3.41
R&S
OSP-B123 RF Switch Module
Figure 3-92: R&S
OSP-B123
R&S
OSP-B123 (order no. 1515.5527.02) consists
of 6 failsafe SPDT relays and 1
SP6T relay, all electromechanical, fre-
quency range DC to 18
GHz, with internally 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.
SP6T
relay:
The terminal port is labeled with C (common), the other relay ports are labeled with
numbers.
The relay type is monostable (or "failsafe open"). Hence, with no voltage applied to the
relay, no RF connection is provided from terminal C to any of the numbered ports. To
establish an RF connection between C and one of the numbered ports, a continuous
voltage must be applied to the corresponding power terminal of the relay.
The relay is 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.
The module's on-board memory stores its configuration data.
The switch unit provides power supply and control via
two
module bus cables to two
module bus connectors on the module's printed board. The available module bus con-
nectors ("Mxx") are shown in
To find out, which two module bus connectors on the switch unit's motherboard your
module uses, refer to the headline of the control screen as in
ple, module R&S
OSP-B123 uses buses "M01" and "M02". Alternatively, you can query
R&S
OSP-B123 RF Switch Module
