Rohde & Schwarz OSP-B200S2, Руководство пользователя

Страница: 139 / 327

Modules
R&S
®
OSP
139 User Manual 1178.7100.02 ─ 05
The R&S OSP automatically recognizes the relays installed in the R&S OSP-B142.
The user interface displays these relays as DP3T (version .03) or SPDTs (versions .11
to .13).
The following diagram explains the difference between the switching schemes of mod-
ule R&S
OSP-B142:
Figure 3-133: SPDT (terminated) and DP3T (non-terminated) switching schemes
1 = SPDT, not activated, C switched to P2, P1 is terminated with 50
Ω
2 = SPDT, activated, C switched to P1, P2 is terminated with 50
Ω
3 = DP3T, not activated, P2 switched to C, P1 switched to the "50
Ω
" port (used as output port)
4 = DP3T, activated, P1 switched to C, P2 switched to the "50
Ω
" port (used as output port)
You can use the output ports as inputs, and vice versa, because signals can travel in a
bidirectional way. The ports are labeled with "C", "P1" (equivalent with NO), "P2"
(equivalent with NC) and "50
Ω
".
SPDT :
Each of these relays is built-up from three individual solid-state switches as on the left
in
Figure 3-133 .
Here, the common terminal "C" can be switched to one of the ports "P1" or "P2", while
the other port is connected to a "50
Ω
" port for external termination:
●
When the relay is not activated (control voltage = logical 0) and after a reset, the
relay automatically falls back to its default state. In this state, the ports C - P2 and
P1 - 50
Ω
(termination) are connected.
●
When the relay is activated (control voltage = logical 1), the ports C - P1 and P2 -
50
Ω
(termination) are connected.
DP3T :
This double-pole triple-throw relay (DP3T or 2P3T) is a switch with 2 input (or output)
ports and 3 output (or input) ports. Each relay is built-up by three individual solid-state
switches as on the right in
Figure 3-133 .
Here, the ports "P1" and "P2" serve as input ports , while the ports labeled with "C"
and "50
Ω
" serve as output ports . Note that in this module version, the "50
Ω
" ports
are delivered without external termination. Each input (P1 and P2) can be switched
between 2 adjacent outputs, where one output is common to both inputs:
R&S OSP-B142 RF SSR Power Module