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General Information
Compatibility with the HP 3325A
designed to improve upon the capabilities of the
rir oo25A without sacrificing compatibility. In most cases the new features do not cause
compatibility problems. Complete backward compatibility is achieved by turning off the
enhancements switch (on the rear panel). This feature is also programmable. Table 3-2
shows a comparison of the HP 3325A features that have been enhanced and are controlled by
the enhancements switch.
Table 3-2. Comparison of compatible and enhanced features relative to HP 3325A
Compatibility Mode
Enhancement Mode
Store/recall registers cleared when power
Is turned off.
Store/recall registers are non-volatile.
Programming times compatible with the
HP 3325A.
Some items program faster.
Amplitude calibration time compatible
with the HP 3325A.
Calibration is faster.
Frequency, time, and phase entries are
truncated.
AI! entries are rounded.
Amplitude or offset entries stop a sweep.
Actual sweep time can vary significantly
from value entered for very narrow-band
sweeps.
Amplitude and offset values can be
changed while sweeping without
stopping the sweep.
Actual sweep time value deviates
less from value entered
Actual sweep stop-frequency can vary
from value entered for very narrow-band
sweeps.
Actual sweep stop-frequency value
deviates less from entered value.
Continuous log sweeps always cover an
integer number of decades.
Partial decades possible.
Log sweep momentarily pauses between
sweeps.
Pause time between log sweep
segments minimized.
3-4
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