Keysight U9361C - Page 15

U9361C/F/G/M RCal Measurement Guide 13
Getting Started
RCal Software - Configuration
Type
Magnitude: Select for correcting magnitude
only (no phase corrections). Use for swept
measurements.
Complex: Select for correcting magnitude and
phase. Use for correcting IF responses for IQ
demodulation measurements.
Complex is only available if RCal Option
CPX is installed.
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
(depending on instrument model and options):
10 MHz, 25 MHz, 40 MHz, 85 MHz, 125 MHz,
140 MHz, I60 MHz, 255 MHz, 510 MHz, 1 GHz,
1.5 GHz, 2 GHz, and 4 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