HP 8712C, Руководство пользователя, Страница: 451 / 559

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Reference
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in menu when measuring transmission or AM delay. A
measurement calibration that corrects for frequency response errors.
Frequency response errors are signal changes as a function of frequency.
See Chapter 6, “Calibrating for Increased Measurement Accuracy” for more
information.
This calibration removes the same frequency response errors as the response
I s o l a t i o n
calibration. In addition, it effectively removes the isolation errors in
transmission measurements. Isolation errors result from leakage between
signal paths (crosstalk).
See Chapter 6, “Calibrating for Increased Measurement Accuracy” for more
information.
in menu. Clears the average and restarts it with the
A v e r a g e
next sweep.
See “‘lb Reduce the Receiver Noise Floor” in Chapter 5 for information on
in several menus such as the calibration menus, the hardcopy menus,
D e f a u l t s
and the CRT adjust menu.
1. If this key is pressed in the transmission, reflection, and AM delay
calibration menus, the default measurement calibration becomes the
active calibration. This calibration is originally performed and stored in
non-volatile memory at the factory by performing an adjustment test. It
is a full frequency span cal of 401 points. When selected, it erases a user
cal, if any.
See Chapter 6 for more information on measurement calibrations.
2. If this key is pressed in the hardcopy menus, it resets parameters such as
addresses, baud rates, handshakes, color, pens, resolution, and margins to
predetermined values.
See “Printing and Plotting Measurement Results” in Chapter 4 for more
information on using the
menus.
3. If this key is pressed in the CRT adjustment menu, it restores the default
CRT timing values.
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