12
U9361C/F/G/M RCal Receiver Calibrator Measurement Guide
RCal Software – Configuration
Frequency:
Start Freq
Stop Freq
Freq Step
Freq Points
Defines frequency range for calibration.
Step
and
Points
are coupled parameters; use either
one to modify the “density” of the points over the
selected frequency range.
For
Complex
calibrations, refers to the
center of the IQ analysis span.
Mechanical
Attenuation:
Mech Atten
Mech Atten Start
Mech Atten Stop
Mech Atten Step
Defines the range of main mechanical attenuator
to calibrate.
Mech Atten Step
uses start, stop, and step
range.
Calibrating over large attenuation ranges
can take a long time, and calibration may
not be possible at the highest attenuation
levels.
Step size is typically 2 dB.
Electronic
Attenuation:
Elec Atten
Elec Atten Start
Elec Atten Stop
Elec Atten Step
Defines the range of the electronic attenuator to
calibrate.
All
calibrates the entire range of electronic
attenuation
Elec Atten Step
uses the start, stop, and step
range.
Bypass
disables electronic attenuation.
Operates only at frequencies < 3.6 GHz.
IF Gain
Auto (default)
High Gain
Low Gain
All
Recommended to use
Auto
and set
Match
State
=
False
.
High Gain
sets the IF gain
to 10 dB for better noise levels, while
Low
Gain
sets the IF gain to 0 dB for large
signals.
Auto
will set the IF gain to 10 dB if
the input attenuator is set to 0 dB.
All
will
calibrate for both High Gain and Low Gain.
IF Path
Selects the IF and digitizer path to be calibrated.
Swept
is only used for
Magnitude
calibrations.
Other paths for IQ demodulation include:
— 40 MHz
— 160 MHz
— 255 MHz
— 520 MHz
— 1 GHz
Only IF Paths that are available in an
instrument’s HW configuration will appear.
Calibration is valid for the maximum
bandwidth of the IF path.
Column Title
Description
Additional Information
