R&S OSP
Applications
Operating Manual 1505.3896.12 - 14
190
Risk of module damage
The maximum voltage to be directly applied to the module R&S OSP-B104 input lines
is TTL level. For voltages up to 28 V DC, a resistor has to be used in series with a
minimum of 22
kΩ.
For more details, see drawing in
chapter 8.4.2
8.5.4 Output Ports of R&S OSP-B104
The output ports of the module R&S OSP-B104 are designed as FET driver switching
to GND when activated. Each output is protected with diode against transients which
may occur when switching inductive loads such as relay coils.
Each output port can draw a maximum of 200 mA. The current draw of all four output
ports of the R&S OSP-B104 module is limited to a maximum of 800 mA.
R&S OSP-B104 current consumption
The R&S OSP is able to supply a nominal current of 800 mA for the module
R&S OSP-B114. But the total current for all three slots in the R&S OSP is limited to
2 A.
One application for the use of the output ports is to switch on a lamp while an EMS
measurement is made. The lamp might illuminate a sign “Test in progress”. If the lamp
is an ordinary 230 V lamp, an additional relay is required in order to switch the mains
voltage.
8.6 Application of Module R&S OSP-B114
The module R&S OSP-B114 is desiged for applications in small or medium systems
for Electromagnetic Susceptibility (EMS). The module fulfills the following tasks:
●
Switching of the output of two power amplifiers to one or two transmit antennas
(or other kind of transducers).
●
Providing the circuitry for an interlock loop with the following functions:
- monitoring a interlock loop and read/display the actual status
- power down external amplifiers depending on interlock status
- disconnect the signal generator from power amplifier (if amplifier cannot be
powered down) depending on interlock status
●
Four output lines. Can be used for example to control the polarization of the
transmitting antennas
●
Four input lines
Together with other switching modules out of the R&S OSP family, the complete
switching for a system can be realized as shown in the below example.
