Modules
R&S
®
OSP
96
User Manual 1178.7100.02 ─ 05
–
The "PA Interlock Control 1" circuit between pin
3 and pin
7 is controlled by the
module's interlock logic. This circuit can, for example, shut down (power off) an
external RF power amplifier, if the interlock loop is open.
The module's dialog in the firmware (
can display and query the state of the input channels at any time.
●
OUT
The female D-Sub 9 connector labeled "OUT" provides 4 output channels and 5
other lines, as shown in
:
–
The 4 digital output channels at pins 1, 2, 6 and 7 can be programmed inde-
pendently from each other. You can use the OUT channels, for example, for
controlling the position and polarization of the transmitting antennas.
These lines are specified, each, for a maximum load of 200
mA at 28
V
DC.
The maximum total load on the module is 600
mA, as specified in the data
sheet. Each output channel is designed as a MOS-FET (open drain) that
leaves the channel's pin on high impedance in the inactive state. When activa-
ted, the FET switches the pin to internal ground. Each output is protected by
two TVS diodes against transient disturbances, which can occur when switch-
ing inductive loads, such as relay coils.
–
Pin 5 is a ground contact.
–
Pin 3 of the output port ("Interlock LED" in
) is controlled by the
module's interlock logic and activated together with the "INTLK LED". It is
specified at a maximum of 100
mA. Hence, you can use pin
3 and pin
9
("+28
V
DC") of the output port to control a remote LED or a different indicator
in a separate location, as in
. For example, this indicator can be on
the front panel of a rack or in an office.
–
The "PA Interlock Control 2" circuit between pins 4 and 8 is controlled by the
module's interlock logic, too. This circuit can, for example, shut down (power
off) another external RF power amplifier, if the input port's interlock loop is
open.
●
DPDT
The electromechanical DPDT power relay R1 can switch the RF output of two
power amplifiers to one or two transmitting antennas or other transducers. It has 4
numbered terminal ports and is suited for a frequency range from DC to 12.4
GHz.
For power ratings, refer to the data sheet.
The type of relays is monostable (or "failsafe"), showing the following behavior:
–
When the relay is
not activated
(no voltage applied) and after a reset, the ter-
minals
1 + 2
and
3 + 4
are connected (this state is also the automatic default)
–
When the relay is
activated
, the terminals
1 + 3
and
2 + 4
are connected
●
SPDT
The internally terminated solid-state relay (SSR) K14 of SPDT type is controlled by
the interlock and suited for a frequency range from 9
kHz to 10
GHz.
The terminal port is labeled with C (common), the other relay ports are labeled with
NC (normally closed) and NO (normally open). Terminal C is connected either with
relay port NC or NO.
R&S
OSP-B114 EMS Test Control Module
