User Manual

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16.4 Turning a Single Digital Channel On or Off
1. Press the Digital button on the front panel to open the DIGITAL menu.
2. Press the ChannelControl softkey and turn the Universal Knob to select the desired channel
number. Press the ChannelControl softkey to turn the selected channel on and off (you can
also press the Universal Knob to do this).
16.5 Turning All Digital Channels On or Off
1. Press the Digital button to open the DIGITAL menu.
2. Press the Channel Group softkey to select to select which set of eight digital channels to turn
on or off (D0 to D7 or D8 to D15). Using the Universal Knob, set the arrow to the set you wish
to turn on or off, then press either the Channel Group softkey or the Universal Knob to toggle
the state.
16.6 Changing the Logic Threshold for Digital Channels
1. Press the Digital button to open the DIGITAL menu.
2. Press the Thresholds softkey to enter the THRESHOLDS menu.
3. Press the D0~D7 softkey and turn the Universal Knob to select a logic family preset or select
Custom to define you own threshold.
4. Repeat as needed for the D0~D7 softkey.
Figure 130 - THRESHOLDS menu
Logic Family
Threshold Voltage
TTL
1.5 V
CMOS
1.65 V
LVCMOS3.3
1.65 V
LVCMOS2.5
1.25 V
Custom
Variable from -3 V to +3 V
Table 10 - Logic thresholds
• The threshold you set applies to all channels in the chosen channel group.
• Values greater than the set threshold are high (1) and values less than the set threshold
are low (0).