HP 8591C, Руководство пользователя, Страница: 54 / 373

Channel Measurements
Making Channel Measurements
Most measurements update the result at the end of a sweep or at the end of
multiple sweeps. Refer to each measurement type.
Hints
1. If you accidentally use the wrong key sequence, reenter the channel. If
CHANNEL SELECT
is the active function, enter the channel number, then press Otherwise, press
CHANNEL SELECT,
enter the channel number, then press
2. If you leave the cable TV (to use markers, for example) or exit a test incorrectly you can
return to the last used cable TV menu by pressing the mode key twice:
In either of the above cases, or if
you
are lost in the
CABLE TV ANALYZER
mode, press
to reenter the
CABLE TV ANALYZER
mode, then enter a channel number.
4. If you want to set the analyzer to the power-on default conditions after using the cable TV
functions, you can either cycle the power or press
5. After exiting any test, you can step up or down to an adjacent numbered channel pressing
or (step down).
6. Appropriate vertical interval test signals must be present for meaningful results in
in-channel frequency response, differential gain and phase, and chromalluma delay inequality tests.
Advertisement insertion equipment may cause the signals to be deleted during their active time.
Note that if a channel is not selected before executing a test the message
PLEASE SELECT A CHANNEL will be displayed. A channel must be entered
before continuing with the test.
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