Keysight Technologies N9330B, User Manual

Page: 33 / 107

Making Measurements
Calibrate the N9330B before making measurements
27
Calibrating procedure introduction
Choose either the T-combo or the Electronic calibrator
to perform a calibration process. Different combinations
of calibration mode and calibrator may benefit the
measurement accuracy differently. (Assuming the
measurement resolution remains unchanged):
• Using
SelectedSpan
calibration mode and the T-combo
calibrator provides a more accurate calibration.
• Selecting
FullSpan
calibration mode and electronic
calibrator is the simplest, most convenient calibration.
The tester default setting is the
SelectedSpan
calibration
mode. Keysight recommends using the
SelectedSpan
calibration mode for best results.
It is important to keep the calibration frequency range as
close as possible to the actual sweep frequencies
necessary for the measurements. Calibrating over a
larger frequency span than the actual measurement
range will reduce the accuracy. For example, using a 1
GHz calibration range when the measurement range is
only few kHz.
Calibrate with an electronic calibrator
The tester needs about 35 sec. to record the data of an
Electronic calibrator the first time a new Electronic
calibrator is used with a specific tester.
After the initial use of an Electronic calibrator, the tester
requires approximately 12 sec. to perform the automated
open-short-load calibration.
The Electronic calibrator performs an automatic,
open-short-load consecutively:
1 Press
[CAL]
to bring up a dialog box for calibration
guidance.
2 Connect the Electronic calibrator to the RF OUT
connector on the top panel of the tester. Connect the
USB cable between the electronic calibrator and the
tester USB port. The correct USB cable is supplied
with an Electronic calibrator.