Level Display / RF Input R&S ESCI
1166.6004.12 4.78 E-1
RF INPUT
AC DC
The RF INPUT AC/DC softkey switches between AC and DC coupling of the
instrument input.
IEC/IEEE bus commands INP:COUP AC
RF ATTEN
MANUAL
The RF ATTEN MANUAL softkey allows the attenuation to be entered
irrespective of the reference level.
The attenuation can be set in 10 dB steps between 0 and 75 dB.Other entries
will be rounded to the next lower integer value.
If the defined reference level cannot be set for the given RF attenuation, the
reference level will be adjusted accordingly and the warning "Limit reached"
will be output.
Note: The value 0 dB cannot be switched on unless the 10 dB MIN function
is off. This protects the input mixer from overloading by mistake.
IEC/IEEE-bus command: INP:ATT 40 DB
RF ATTEN
AUTO
The RF ATTEN AUTO softkey sets the RF attenuation automatically as a
function of the selected reference level.
This ensures that the optimum RF attenuation desired by the user is always
used.
RF ATTEN AUTO is the default setting.
IEC/IEEE-bus command: INP:ATT:AUTO ON
10 dB MIN
ON OFF
The 10 dB MIN softkey determines whether or not the 0 dB position of the
attenuator is used when the attenuation is set manually or automatically.
The default setting is "10 dB MIN ON".
This means the R&S ESCI always leaves at least 10 dB RF attenuation on in
order to protect the input mixer.
The 0 dB position cannot be switched on manually by the user. This prevents
0 dB from being set by mistake especially for measurements on objects with
a high signal voltage.
IEC/IEEE-bus command: INP:ATT:PROT ON
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