Measuring Waveform Data; To Make Cursor Measurements - HP 54645A User's And Service Manual

Measuring Waveform Data

With the HP 54645A/D Oscilloscopes, you can measure waveform data
using Voltage, Time, and Cursor keys. This section shows you how.

To make cursor measurements

The following steps guide you through the front-panel Cursors key. You can
use the cursors to make custom voltage or time measurements on the signal.
Connect a signal to the oscilloscope and obtain a stable display.
1
Press . View the cursor functions in the softkey menu:
2
Cursors
Source selects a channel for the voltage cursor measurements. If a
Measurement/Storage module is installed in the oscilloscope, and
Function 2 is selected, you can select F1 or F2 for the source.
Active Cursor includes voltage cursors V1 and V2, and time cursors t1
and t2. Pressing the voltage cursors alternates between V1 or V2, or
both V1 and V2. Pressing the time cursors alternates between t1 or t2,
or both t1 and t2.
If a Measurement/Storage module is installed in the oscilloscope, and
you select F2 as the source with FFT turned on, the active cursors
include f1 and f2. Use the Entry knob to change the active cursor.
Clear Cursors erases the cursor readings and removes the cursors from
the display.
On HP 54645D, the Readout softkey gives a reading of the time or
voltage cursor measurement.
For the time cursor readout, you can select Time, Hex, Binary, or
Degrees. Binary displays all digital channels by channel number. Hex
shows only the displayed channels, with the top channel displayed as
the most significant bit. When Active Cursor is t1/t2, the Readout Time
softkey sets the display to show the cursor positions in seconds, and the
Readout Degrees softkey shows the cursor positions in relative number
of degrees.
For the voltage cursor readout, you can select Volts or %. When Active
Cursor is V1/V2, the Readout Volts % softkey sets the display to show the
cursor positions in volts when Volts is highlighted, and as a percentage
when % is highlighted.
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