A/D External Time Base Signal; A/D Stop Signal - Measurement Computing PCI-DAS6034 User Manual

Hide thumbs Also See for PCI-DAS6034:

Table of Contents

PCI-DAS6034 & PCI-DAS6035 User's Guide

4.2.8 A/D EXTERNAL TIME BASE Signal

The A/D EXTERNAL TIME BASE signal can serve as the source for the on-board pacer

circuit rather than using the 40 MHz internal time base. Any AUXIN pin can be set

programmatically as the source for this signal. The polarity is programmable.

The maximum frequency for the A/D EXTERNAL TIME BASE signal is 20 MHz. The

minimum pulse width is 23 ns high or low. There is no minimum frequency specification.

Figure 4-13 shows the timing specifications for the A/D EXTERNAL TIME BASE signal.

Figure 4-13. A/D EXTERNAL TIME BASE Signal Timing

The A/D STOP signal indicates a completed acquisition sequence. You can program this

signal to be available at any of the AUXOUT pins. The A/D STOP output signal is a 50 ns

wide pulse whose leading edge indicates a DAQ done condition.

Figure 4-14. A/D STOP Signal Timing

4–10

Functional Description

Table of Contents

Do you have a question about the PCI-DAS6034 and is the answer not in the manual?

Pci-das6035