Tektronix 2247A

Basic Applications
NOTE
Voltage cursors are initialized to levels seen by the peak lms
detector circuitry. Noise and other signals riding on the
signal to be measured will cause a slight displacement of the 2
cursors from the displayed waveform peaks, and above la
50 MHz the bandwidth rolloff of the trigger circuit will affect
the initial cursor positions on the waveform.
5, For a peak-to-peak voltage measurement, slightly reposition the cur-
sors
as necessary to precisely align them with the peak amplitudes of
the waveform, and the work is done. The J OR DELAY control positions
both cursors together (keeping the original spacing), and the -{ control
positions the independent cursor. Then, simply read the measurement
value displayed In the top line of the readout.
6. To make voltage difference measurements between any other locations
on the waveform, simply move the |— cursor to the new point of interest |
and then position the Independent -} cursor to the second point on the
waveform and read the voltage difference.
Ground-Referenced Voltage
Voltage measurements using ground as a reference are made using the
th VOLTS > cursors. The ground tracking cursor is fixed at the ground es
level of the applied signal and the Independent cursor above or below
ground as necessary to measure the voltage at the cursor position. Use the
following procedure steps to set up to measure ground-referenced
voltages.
1. Apply the signal to the Input connector(s).
2.
Set:
bat
VERTICAL
MODE
As
desired
Horlzontal
MODE
A
CH
1/CH
2
COUPLING
oC
~
3. Press AUTO SETUP button.
4. Press the CURSOR VOLTS button to display the measurement selection
menu
and
select
the
7
VOLTS
~\
cursors.
The
Independent
cursor
Is
initialized
to
the
+PEAK
of
the
Input
waveform.
5-8 2247A Operators