Agilent Technologies 8719D User Manual page 636

Conserving Memory
If you are concerned about conserving memory, either internal memory or external disk space,
some of the most memory-intensive operations include:
two-port error correction
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interpolated error correction
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1601 measurement points
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using time domain
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Using Saved Calibration Sets
When you are saving to internal memory (CMOS, non-volatile memory), calibration sets are
linked to the instrument state and measurement parameter for which the calibration was
done. Therefore a saved calibration can be used for multiple instrument states as long as the
measurement parameter, frequency range, and number of points are the same. A full 2-port
calibration is valid for any S-parameter measurement with the same frequency range and
number of points. When an instrument state is deleted from memory, the associated calibration
set is also deleted if it is unused by any other state.
The following hints will help you avoid potential problems:
If a measurement is saved with calibration and interpolated calibration on, it will be restored
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with interpolated calibration on.
A calibration stored from one instrument and recalled by a different one will be invalid. lb
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ensure maximum accuracy, always recalibrate in these circumstances.
Instrument characteristics change as a function of temperature, and a calibration stored at
one temperature may be inaccurate if recalled and used at a different temperature. See
chapter 7, "Specifications and Measurement Uncertainties," for allowable temperature ranges
for individual specifications
The HP 8719D/20D/22D can read disk files created by the HP 8719A/20A/22A and the
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HP 8719A/20A/22A can read 6les created by the HP 8719D/20D/22D. A disk file translator
is available to make HP 8719C/2OC/22C disk flies compatible with HP 8719A/20A/22A ties.
These llles can then be read by the HP 8719D/20D/22D. Contact your local Hewlett-Packard
sales and service office for this procedure.
12-6 Preset State and Memory Allocation