Analog,digital and pfi triggering of PXI 6133 card

Hello,
i am using PXI-6133 card. i observed that there are three type of triggering options(i.e., analog, digital and PFI) available on each card. i want to know the difference? and also best one.
regards
chandu

Hi chandu,
Analog triggering is based on the value of an analog
signal. For example you can trigger when your analog signal goes above or below
a specified value. Digital triggering happens on a rising or falling edge of a
digital signal. For either type of triggering you must have a trigger source
that is the signal you are triggering on. For digital triggering on your card this
can be any PFI line. For analog tirggering it can be any analog input channel.
A detailed explanation of the triggering capabilities of your PXI-6133 can be
found in the S-Series User Manual. Triggering is discussed in Chapter 13. Also
a more great summary of triggering in general can be found in the Developer
Zone article, Tips and Techniques in Data
Acquisition Triggering - NI-DAQmx. What triggering is better depends on your
application and which one is more suited to your trigger signal. If you have a
digital trigger source then digital triggering will work great. If your trigger
source is an analog signal than you will probably need to use analog triggering.
Let me know if you have any questions and have a great weekend.
Thanks,
Nathan
National Instruments
Digital Hardware Engineer

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External in and out triggers on pxi 6541

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Solved!
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The PXI 6541 actually has four PFI lines which can be used for importing and exporting triggers - though as you've determined, only PFI 0 has a direct front panel connection. The others (PFI 1-3) are accessible through the Digital Data & Control port, and thus can be easily accessed when using either the CB-2162 or SMB-2163 connector block (or any similar breakout for the DDC port):
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Hi Scott,
I assisted you in testing the PXI-6133 card and together we found that the cable connecting the card to the SCB-68 was a SH68-68-D1 cable, which is typically used with our digital products where pin 19 (P0.4 on the PXI-6133) is not connected. The correct cable is the SH68-68-EP for the PXI-6133.
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Attachments:
method export signal.vi ‏21 KB
method connect terminal.vi ‏36 KB
Send a TTL pulse.JPG ‏288 KB

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Graziano,
Your message is very interesting...
Modules upstream and downstream of the problem module are all working fine. Their ready lights are "on" and I can access them from the NI software.
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Analog,digital and pfi triggering of PXI 6133 card

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