Operation
Measurements with
Cursors
The controls in the gray box (AV, At, TRACK/INDEP, A REF OR DLY POS, and A)
operate cursors and sweep delays. With the cursors, you can measure voltage, time,
frequency, ratios, and phase. We often refer to the A REF OR DLY POS control as
"A REF" for convenience.
Cursors are more accurate and easier to use than the graticule. They eliminate the
inconvenience and errors of counting and interpolating graticule markings and they
avoid CRT linearity errors.
For best AV accuracy, display the signal on either CH
1
or CH 2 with VOLTS/DIV
set for three to eight divisions of waveform amplitude. For best At and 1/At accuracy,
use the fastest sweep that will include the interval of interest.
Measure
Voltage
1.
Turn on the AV cursors and readout with the AV button.
2.
Align the cursors with points of interest, such as waveform peaks, using
the A REF and A knobs.
3. The readout shows the voltage between the points marked by the
cursors.
4.
Press AV to turn off the AV cursors and readout.
Measure
Time,
with
A-Sweep
or
B-Sweep
Alone (SEC/DIV
in)
1.
Turn on the At cursors and readout with the At button.
2.
Align the cursors with points of interest, such as waveform zero-
crossings, using the A REF and A knobs.
3. The readout shows the time between the points marked by the cursors.
4.
Press At to turn off the At cursors and readout.
2465B/2455B/2445B Operators
2-13
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