To Change The Logic Threshold For Digital Channels; To Reposition A Digital Channel - Agilent Technologies 4000 X-Series User Manual

To change the logic threshold for digital channels

1 Press the [Digital] key so that the Digital Channel Menu is displayed.
2 Press the Thresholds softkey
3 Press the D15 - D8 or D7 - D0 softkey, then select a logic family preset or
Logic family
TTL
CMOS
ECL
User
The threshold you set applies to all channels within the selected D15 - D8
or D7 - D0 group. Each of the two channel groups can be set to a
different threshold if desired.
Values greater than the set threshold are high (1) and values less than the
set threshold are low (0).
If the Thresholds softkey is set to User, press the User softkey for the
channel group, then turn the Entry knob to set the logic threshold. There
is one User softkey for each group of channels.

To reposition a digital channel

1 Make sure the multiplexed scale and position knobs above and below
2 Use the multiplexed Select knob to select the channel.
3 Use the multiplexed Position knob to move the selected channel
Agilent InfiniiVision 4000 X-Series Oscilloscopes User's Guide
select User to define your own threshold.
the key are selected for digital channels.
If the arrow to the left of the [Digital] key is not illuminated, press the
key.
The selected waveform is highlighted in red.
waveform.
Digital Channels
Threshold Voltage
+1.4 V
+2.5 V
–1.3 V
Variable from –8 V to +8 V
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