Analog input triggering, 3 trigger sources, Software triggering – ADLINK USB-1210 User Manual

Page 35: External analog triggering, Trigger sources, Figure 3-4, Configuring different sampling rates, 3 trigger sources software triggering

Operation & Calibration

USB-1210

Figure 3-4: Configuring Different Sampling Rates

Sampling Rate Control with External Conversion Strobe
Clock

The A/D conversion clock can be provided by external strobe
clock via CONV pin. The valid frequency of external clock is from
DC to 2 MHz and the minimum pulse width is 225ns.

Analog Input Triggering

The USB-1210 supports flexible trigger sources for analog input
functionality. The trigger source can originate with software com-
mand, external analog, or external digital signal in continuous ana-
log input mode. Users can configure the trigger source and trigger
mode by software.

3.1.3

Trigger Sources

Software Triggering

This trigger mode requires no external trigger source. The trigger
asserts immediately following execution of the specified function
calls to begin the operation.

External Analog Triggering

The analog multiplexer can select one input channel as the analog
trigger source. That is, one of 4 input channels in differential mode
can be selected as the analog trigger source. An external analog

TIMEBASE

DATA

Acquisition
In Progress

Trigger

Acquisition begins following this clock edge

ScanIntrv = 1

D10

ScanIntrv = 2

ScanIntrv = 3