Measurement Computing Data Translation DT9857, User Manual

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Appendix A
154
Trigger Specifications
Table 30 lists the specifications for the triggers on the DT9857 and DT9857E modules.
Table 30: Trigger Specifications
Feature DT9857 and DT9857E Specifications
Trigger sources
Internal software trigger:
External digital trigger:
Threshold trigger: Software-initiated
Software-selectable
Software-selectable
External trigger (digital)
Input type:
Input termination:
Logic family:
Input logic load:
Lower threshold:
Upper threshold:
Hysteresis:
Input sink current:
Minimum pulse width high/low:
Maximum input signal: Edge-sensitive, rising- or falling-edge trigger (software-selectable)
None
LVTTL inputs
1 LVTTL
1.1 V
1.3 V
0.2 V
33
μ
A
250 ns
±30 V
Threshold trigger
Type:
Threshold level:
Hysteresis:
Rising- or falling-edge threshold trigger on any analog input channel
(software-selectable)
−
10 V to +10 V @ gain of 1; ±1 V @ gain of 10
100 mV
Trigger delay 1 conversion period maximum