Table 4-8: ideal transfer characteristic of, Analog trigger src1 (extatrig), Figure 4-26: below-low analog trigger condition – ADLINK DAQe-2502 User Manual
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Operation Theory
53
The trigger signal asserts when an analog trigger condition is met.
There are five analog trigger conditions in DAQ-/DAQe-/PXI-2502/
2501 card. The DAQ-/DAQe-/PXI-2502/2501 card uses two
threshold voltages: Low_Threshold and High_Threshold to com-
pose five different trigger conditions. You can configure the trigger
conditions easily via software.
Below-Low Analog Trigger Condition
Figure 4-26 shows the below-low analog trigger condition, the
trigger signal asserts when the input analog signal is lower than
the Low_Threshold voltage. High_Threshold setting is not used
in this trigger condition.
Figure 4-26: Below-Low Analog Trigger Condition
Trigger Level digital setting Trigger voltage
0xFF
9.92V
0xFE
9.84V
---
---
0x81
0.08V
0x80
0
0x7F
-0.08V
---
---
0x01
-9.92V
0x00
-10V
Table 4-8: Ideal Transfer Characteristic of Analog Trigger SRC1
(EXTATRIG)