R&S ESU Series, Руководство по эксплуатации, Страница: 571 / 855

R&S ESU Remote Control – Description of Commands
INPut Subsystem
6.132 Operating Manual 1302.6163.12 - 03
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: R, A
INPut<1|2>:MIXer[:POWer] <numeric value>
This command defines the desired power at the input mixer of the R&S ESU. On any change to the
reference level the RF attenuation will be adjusted in a way that makes the difference between
reference level and RF attenuation come as close to the desired mixer level as possible.
Example:
"INP:MIX -30"
Characteristics: *RST value: - 25 dBm
SCPI: device-specific
Mode: A
INPut<1|2>:MIXer:AUTO ON | OFF
This command enables/disables the automatic setup of the mixer level.
Example:
"INP:MIX:AUTO ON"
Characteristics: *RST value: ON
SCPI: device-specific
Mode: A
INPut<1|2>:PRESelection[:STATe] ON | OFF
In analyzer mode, this command switches the preselection on or off.
Example:
":INP:PRES:STAT ON"
Characteristics: *RST value: OFF
SCPI: device-specific
Mode: A
In receiver mode, the preselection is always switched on and cannot be switched
off.