Rohde & Schwarz R&S FSP Series, Operating Manual

Page: 520 / 796

R&S FSP Remote Control – Description of Commands
INPut Subsystem
6.126 Operating Manual 1164.4556.12 - 06
INPut<1|2>:GAIN:STATe ON | OFF
This command switches the preamplifier for the instrument on or off. The switchable gain is fixed to 20
dB.
Example:
"INP:GAIN:STAT ON"
'Switches the 20 dB preamplifier on.
Characteristics: *RST value: OFF
SCPI: conform
Mode: A
The command is only available with the option electronic attenuator R&S FSP-B25.
INPut<1|2>:IMPedance 50 | 75
This command sets the nominal input impedance of the instrument. The set impedance is taken into
account in all level indications of results.
The setting 75
Ω
should be selected, if the 50
Ω
input impedance is transformed to a higher impedance
using a 75
Ω
adapter of the RAZ type (= 25
Ω
in series to the input impedance of the instrument). The
correction value in this case is 1.76 dB = 10 log (75
Ω
/ 50
Ω
).
Example:
"INP:IMP 75"
Characteristics: *RST value: 50
Ω
SCPI: conform
Mode: A