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R&S FSP
Remote Control – Description of Commands
INPut Subsystem
6.124
Operating Manual 1164.4556.12 - 06
6.12 INPut Subsystem
The INPut subsystem controls the input characteristics of the RF inputs of the instrument. The measure-
ment windows are assigned to INPut1 (screen A) and INPut2 (screen B).
INPut<1|2>:ATTenuation
0 to 70/75dB
This command programs the input attenuator. To protect the input mixer against damage from
overloads, the setting 0 dB can be obtained by entering numerals, not by using the command DEC.
The step width is 10 dB without the option electronic attenuator, the range 0 dB to 70 dB.
The input attenuation can be set in 5 dB steps between 0 dB and 75 dB with the option electronic
attenuator (R&S FSP-B25).
In analyzer mode, the attenuation set on the step attenuator is coupled to the reference level of the
instrument. If the attenuation is programmed directly, the coupling to the reference level is switched off.
Example:
"INP:ATT 40dB"
'Sets the attenuation on the attenuator to 40 dB and switches off the coupling to the
reference level.
Characteristics:
*RST value: 10 dB (AUTO is set to ON)
SCPI: conform
Mode:
A
INPut<1|2>:ATTenuation:AUTO
ON | OFF
This command automatically couples the input attenuation to the reference level (state ON) or
switches the input attenuation to manual entry (state OFF). The minimum input attenuation set with the
coupling switched on is 10 dB (with electronic attenuator option: 5 dB).
Example:
"INP:ATT:AUTO ON"
'Couples the attenuation set on the attenuator to the reference level.
Characteristics:
*RST value: ON
SCPI: conform
Mode:
A
INPut<1|2>:ATTenuation:AUTO:MODE LNO
This command changes the operating point of the input mixer so that (with the RF attenuation
remaining the same) the inherent noise of the R&S FSP is reduced compared to the default setup. If
the softkey is enabled, the R&S FSP has an improved dynamic range above 3 GHz.
Example:
"INP:ATT:AUTO:MODE LNO"
Characteristics:
*RST value: OFF
SCPI: device-specific
Mode:
A
Summary of Contents for R&S FSP Series
Page 1: ...R S FSP Spectrum Analyzer Operating Manual 1164 4556 12 06 Test Measurement Operating Manual ...
Page 24: ...R S FSP Putting into Operation 1 2 Operating Manual 1164 4556 12 06 ...
Page 72: ...R S FSP Manual Operation 3 2 Operating Manual 1164 4556 12 06 ...
Page 793: ...R S FSP Index Operating Manual 1164 4556 12 06 4 11 ...
Page 794: ...R S FSP 4 12 Operating Manual 1164 4556 12 06 ...
Page 795: ...Operating Manual 1164 4556 12 06 4 13 R S FSP ...
Page 796: ...R S FSP 4 14 Operating Manual 1164 4556 12 06 ...