HP 54645A - Configuring the Mixed-Signal Oscilloscope; To Change the Logic Threshold for Input Signals

Configuring the Mixed-Signal Oscilloscope
This section describes how to configure the following items for the
HP 54645D Mixed-Signal Oscilloscope, including changing the logic
threshold for input signals.
To change the logic threshold for input signals
1
Press
Label/Threshold
.
2
Press the
Threshold Menu
softkey to display the range of channels for
which you want to set the logic threshold, and the available logic
thresholds.
3
Press the
Set
softkey to select a group of digital channels.
You can set thresholds for digital channels
D0-D7
and
D8-D15
.
4
Press the
TTL
,
CMOS
, or
ECL
softkey to choose a preset threshold.
5
To set a different threshold, press the softkey just to the right of the
ECL
softkey (see the following figure). Then, vary the threshold voltage from
-6.00 V to 6.00 V with the Entry knob.
6
If you want to set the threshold for the other group of channels,
select the other group and do steps 4 and 5 again.
You can exit the threshold setting menu by pressing
Previous Menu
or
another front-panel key.
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