Agilent Technologies DSO-X 4022A, Руководство пользователя

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Digital Channels
6
Agilent InfiniiVision 4000 X-Series Oscilloscopes User's Guide 131
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
select
User
to define your own threshold.
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
the key are selected for digital channels.
If the arrow to the left of the
[Digital]
key is not illuminated, press the
key.
2 Use the multiplexed Select knob to select the channel.
The selected waveform is highlighted in red.
3
Use the multiplexed Position knob to move the selected channel
waveform.
Logic family Threshold Voltage
TTL +1.4 V
CMOS +2.5 V
ECL –1.3 V
User Variable from –8 V to +8 V