BK Precision 2560B Series, Руководство пользователя

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Digital Channels
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8.6 Logic Threshold for Digital Channels
The threshold level determines how the input signal is evaluated. The threshold level can be set in the Logic Setting .
The threshold you set applies to all channels within the selected D7 - D0 or D15 - D8 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).
To set a threshold level:
1. Press the Digital key to open the Digital menu.
2. Use the touchscreen controls to select the Logic Setting (D7:D0) or Logic
Setting (D17:D8) option.
– The window shown in figure 8.8 will appear.
3. Use the touchscreen controls to select the desired threshold.
– Refer to table 8.1 for more information on the threshold voltage.
4. If the Thresholds is set to Custom , use the touchscreen to select Threshold
Figure 8.8 Logic Setting
for the channel group, then use the virtual keypad to set the logic threshold.
Logic Family Threshold Voltage
TTL 1.5 V
CMOS 1.65 V
LVCMOS 3.3 V 1.65 V
LVCMOS 2.5 V 1.25 V
Custom Variable from -10 V to +10 V
Table 8.1 Logic Thresholds
8.7 Displaying Digital Channels as a Bus
Digital channels may be grouped and displayed as a 16-bit bus, with each value displayed at the bottom of the display
in binary, decimal, unsigned dec, or hex.
To configure and display each bus:
1. Press the Digital key or use the touchscreen controls to press the Digital Channel Descriptor Box to open the
DIGITAL menu.
2. Use the touchscreen controls to select the Bus option and open the Digital Bus menu.
3. Select the Bus to be configured. (Two busses are available Bus1 or Bus2 )
4. Set the Data Format
5. Set the Bit Wide.
6. Enable the bus display.
7. Move the bus vertical position.
Figure 8.9 demonstrates two busses.
B1
: 16-bit wide hex format
B2
: 16-bit wide binary format