Startscan Signal; Ssh Signal - Measurement Computing PCI-DAS6034 User Manual

PCI-DAS6034 & PCI-DAS6035 User's Guide
Figure 4-8. A/D STOP TRIGGER Output Signal Timing

4.2.4 STARTSCAN Signal

The STARTSCAN output signal indicates when a scan of channels has been initiated. It may
be programmed to be available at any of the AUXOUT pins. The STARTSCAN output
signal is a 50ns wide pulse the leading edge of which indicates the start of a channel scan.

4.2.5 SSH signal

The SSH signal can be used as a control signal for external sample/hold circuits. The SSH
signal is programmable polarity pulse that is asserted throughout a channel scan. The state of
this signal changes after the start of the last conversion in the scan. The SSH signal may be
routed via software selection to any of the AUXOUT pins. Figure 4-10 shows the timing for
the SSH signal.
Figure 4-9. STARTSCAN Start of Scan Timing
Figure 4-10. SSH Signal Timing
4–8
Functional Description