R&S FSMR, Руководство по эксплуатации

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INPut Subsystem R&S FSMR
1313.9723.12 6.1-116 E-1
INPut<1|2>:ATTenuation:PROTection[:STATe] ON | OFF
This command determines whether the attenuator may be switched to 0 dB in manual or automatic
attenuation control.
Example:
Characteristics: *RST value: OFF
SCPI: device-specific
INPut<1|2>:ATTenuation:PROTection:RESet
The FSMR is equipped with an overload protection mechanism. This mechanism becomes active as
soon as the power at the input mixer exceeds a value of 27 dBm. It ensures that the connection
between RF input and input mixer is cut off.
The command resets the attenuator into the state that it had before the overload condition was
detected. It re-connects the RF input with the input mixer.
This command comes into effect only if the reason for the overload condition has been
eliminated. Otherwise the connection between RF input and input mixer is left open.
Example:
"INP:ATT:PROT:PRES"
Characteristics: *RST value: --
SCPI: device-specific
This command is an event and therefore has no query and no *RST value.
INPut<1|2>:ATTenuation:RECal:AUTO[:STATe] ON | OFF
This command specifies whether the auto recal function in the rf level mode of the measurement
receiver is switched on. If active, a recal operation is performed automatically if the signal level
reaches a recal range.
Example:
"INP:ATT:REC:AUTO OFF"
'Switches off automatic recal
Characteristics: *RST value: OFF
SCPI: device-specific
INPut:COUPling AC | DC
This command switches the input coupling of the RF input between AC and DC.
Example: "
INP:COUP DC
"
Characteristics: *RST value: AC
SCPI: conforming
INPut<1|2>:EATT 0 to 30dB
This command programs the attenuation of the electronic input attenuator. The attenuation can be
varied in 5 dB steps from 0 to 30 dB. Other entries are rounded to the next lower integer value. If the
attenuation is programmed directly, the coupling to the reference level is switched off.
If the defined reference level cannot be set with the given RF attenuation, this level is adapted to the
maximum possible value.
The electronic attenuator is switched off in the default state.
Example:
"INP:EATT:STAT ON"
'Switches the electronic attenuator into the signal path.
"INP:EATT 15dB"
'Sets the attenuation of the electronic attenuator to
'15 dB and switches off the coupling to the reference level.
Characteristics: *RST value: 0 dB (state is set to OFF)
SCPI: device-specific
The command is only available with the electronic attenuator option B25.