Measurement Computing USB-1602HS-2AO - Manual (Page 41)

USB-1602HS-2AO User's Guide Specifications
41
Trigger sources
Table 11. External trigger specifications
Parameter Specification
Available trigger sources
 Analog input hardware
 Analog software trigger
 External digital input
 Digital pattern
 Counter/totalizer
Trigger source details
Analog input (hardware) trigger
(CH0 – CH1)
Input signal range: entire span of selected voltage range
Channel selectable
Trigger level:
Programmable (12-bit resolution)
Hysteresis: Programmable (12-bit resolution)
Latency: 1.25 uS typical
Accuracy: ±2% of reading, ±10 mV offset maximum
Analog software trigger
(CH0 – CH1)
Trigger range: Anywhere within range of the trigger channel
Trigger level: Programmable (16-bit resolution)
Latency: one sample period (maximum)
External digital:
 (EXT TRIG — BNC
or
 DIG TRIG — SCSI Input signal range: –15 V to +15 V maximum
Trigger level: TTL level sensitive
Minimum pulse width: 50 ns high, 50 ns low
Latency: 100ns maximum
Digital pattern triggering
DIN0-15
 16-bit pattern triggering on the digital port, DIN0-DIN15
 Programmable for trigger on equal, not equal, above, or below a value.
 Individual bits can be masked for "don’t care" condition.
 Latency: One sample period, maximum
Counter/totalizer triggering:
(CTR0-3)
Counter/totalizer inputs (CTR0-3) can trigger an acquisition. User can select to
trigger on a frequency or on total counts that are equal, not equal, above, or
below a value, or within/outside of a window rising/falling edge.
Latency: One sample period, maximum