Chapter 3 185
Mode
One Port Insertion Loss Measurement
Mode
measuring over a narrower frequency range (for example, a few tens of kHz) will induce
inaccuracies into your results.
NOTE The Calibrate Start/Stop frequencies define the frequency range over
which the CALIBRATION will take place, and do NOT define the
frequency range over which the MEASUREMENT will be made.
If you plan to perform a combination of One-Port Insertion Loss measurement, Return
Loss measurement, and Distance to Fault measurements using a frequency range that you
will set manually, you can perform one calibration for all three measurements as long as
you calibrate over a frequency range that incorporates all three of your measurements, and
as long as your cables do not change. For this reason, if you are doing Distance to Fault
measurements (using a frequency range that you have set manually) as well as any type of
Insertion Loss measurement, Agilent recommends that you select your cable type before
performing calibrations. Press
Meas, Distance to Fault, Meas Setup, Cable Type to set the
cable type.
The calibration remains valid until you do any one of the following:
• set the Distance to Fault frequency range to Auto. Note that the calibration will become
valid again as soon as you switch from Auto back to Manual Frequency Range.
• power off the spectrum analyzer
• change the start frequency to a new value that lies below the start frequency of your
previous calibration
• change the stop frequency to a new value that lies above the stop frequency of your
previous calibration
• change any of the cables that you used for the calibration
• change any of the attenuators that you used for the calibration
• change the type of cable specified under the
Cable Type menu key.
To perform a One Port Insertion Loss Calibration, first select the desired frequency and
then follow the steps in the calibration wizard. To calibrate your spectrum analyzer, you
will need the following pieces of equipment:
• Open/ Short connector, Type N (m) part number 00909–60009
• Calibrated 50 ohm Load connector, Type N (m) part number 85032–60011
NOTE These parts are available as part of the N1996A-SRK Stimulus
Response Calibration Kit.
Mode Stimulus / Response
Key Path
FREQ/Channel, Calibrate
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