HP 8591C, Руководство пользователя, Страница: 86 / 373

Channel Measurements
Making Channel Measurements
Method Tune by start
1. Press the
[
FREQUENCY
]
front panel key.
and stop frequencies
Select START and enter the start frequency setting, then (Enter).
Select STOP and enter the stop frequency setting, then (Enter).
Use the
[
AMPLITUDE
]
front panel key, REF to set the reference level so
the peak of the signal falls approximately 10 to 20 below the top of the
display.
1. Press once the amplitude and frequency are set.
Select Menu 3 of 3
Press DIGITAL CH POWER to enter the digital power measurement.
N O T E
If have selected
TUNE BY FRQ
in the
Tune Conf
ig
menu, the visual carrier
frequency will be used as the center frequency in the channel power measurement. If you try to
manually set the center frequency to a value other than the visual carrier, it will be reset to the value
of the visual carrier when running the test.
The markers are automatically placed at the estimated left and right edges of
the selected channel. The total power between the two markers is calculated
and the result displayed in current units.
If the automatic marker placement is not ideal, the markers may be moved.
Press MARKER 1 to change the position of the left marker.
Press MARKER 2 to change the position of the right marker.
The marker frequency position may be entered directly using the numeric
keypad or adjusted using the knob control and step keys.
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