PCI-6133 always returns huge constant number of counts

Hi,
I am trying to use a PCI-6133 with a BNC-2110 adapter to counting leading edges of pulses.  Please excuse my high degree of ignorance of how to do this.  Anyway, I connected up my TTL input signal according to the BNC-2110 instructions (to PFI-8 via User-2). Whenever I run the DAQmx sample program Count Digital Events.vi, it recognizes the PCI-6133 OK, but always returns an absurdly high and constant number of counts, like 3.2e9.  The number doesn't change as I send test pulses into the input.  It also remains the same even if I disconnect the input line entirely and rerun the sample program.
Rebooting yields the same behavior.
Using DAQ assistant to generate my own code, instead of the sample program, produced exactly the same result.
Thanks for any help you can give me.  I don't even know where to start to debug this problem.
Thanks,
Andy

BVeezy wrote:
How/what exactly are you measureing from;? Are you wiring the digital signal directly into PFI 8? Have your tried using the other counter (CTR1) on the 6133? It should be PFI 3 (as indicated in the manual). You may also try generating a pulse signal from the 6133 and reading it with this VI to determine if your source may be the issue (you could use PFI 2 as a Digital Output for this). Finally, does it read the same value every time you run it (the reported 3.2e9)?
Regards,
Brandon V.
Applications Engineer
National Instruments
Thank you very much for your help.
How/what exactly are you measureing from;?
I am measuring (counting) TTL pulses coming from a TTL driver.  They are about 1 us long and nominal TTL high and low values.  The pulses look fine on a scope.  The rate is very low, typically a few Hz up to perhaps 200 Hz.  The behavior is the same regardless of whether I have the input signal connected to the BNC-2110, however.  The pulses are ultimately generated by a neutron detector, with a bunch of signal processing in between.
Are you wiring the digital signal directly into PFI 8?
The input signal is connected by BNC cable to the "User 2" port on the BNC-2110.  A jumper wire connects the "User2" PFI Terminal to the "PFI-8" PFI Terminal.  Again, the behavior is exactly the same regardless of whether these wires are installed or not.
Have your tried using the other counter (CTR1) on the 6133?
The behavior is exactly the same on ctr1, which has no wires connected to it.
You may also try generating a pulse signal from the 6133 and reading it with this VI to determine if your source may be the issue (you could use PFI 2 as a Digital Output for this).
I tried running a "test panel" in MAX to count the 20 MHz internally generated signal.  It gave the exact same results, on both ctr0 and ctr1.  It did not throw any error message.
Finally, does it read the same value every time you run it (the reported 3.2e9)?
It reads the same value every time I run the sample VI or test panel (3217997774) on both channels, except that the number changes to a different constant number (very close) when I reboot the computer.
I have been wondering if the problem might be associated with the configuration of the ports on the PCI-6133.  The manual repeatedly says that you can configure the ports to input or output, for example, but it is not clear to me how to do that.  When I right-click the device in MAX, "Configure" is not one of the choices, despite what it says in the "Getting Started" manual.
Again, thanks for your help. 
Take care,
Andyaina

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    p_organization_id IN NUMBER,
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    p_shipment_header_id IN NUMBER,
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    p_group_id IN NUMBER
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    v_user_id NUMBER;
    v_print BOOLEAN;
    v_resp_id NUMBER;
    v_resp_appl_id NUMBER;
    v_lot_num VARCHAR2(50);
    BEGIN
    BEGIN
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    FROM apps.fnd_responsibility_tl frt
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    BEGIN
    SELECT rli.lot_num , rli.expiration_date
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    Edited by: user10454886 on Mar 25, 2013 6:31 AM
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    My iphone 4 is stuck in the setup phase with a white background.  It tells me hello in several diffrent  languages and tells me to slide to set up.  I have already backed it up on itunes several times but it always returns to the hello screen with the white back ground.  Can anyone please help me with this?  All of this happened after i updated it for the 1st time. Help pLease?
    Edward

    Hello Edward
    Follow the prompts on your iPhone and you will get either at your home screen like normal or get to a point of restoring from back up. The article below will give step by step for restoring from back up.
    iOS: How to back up and restore your content
    http://support.apple.com/kb/HT1766
    Thanks for using Apple Support Communities.
    Regards,
    -Norm G.

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