Hi I am trying to synchronize our NI daq system with a Krypton K600 camera-based measurement system. Our system: PCI-6052E measurement card, 4 SCXI-1001 chassis with 1102s and 1520s in them. I also have an SCXI-1302 50-pin connector block. The Krypton system requires two TTL signals: one to indicate a clock signal and one to indicate when to start and stop archiving records. I am generating these two counter signals with Dev1/ctr0 and Dev1/ctr1. What I want to do (or think I want to do) is acquire the current value of Dev1/ctr1 in addition to all the other channels so that when the Krypton system sees this signal go high, my program will too. Thus, my program will know which records to archive to a file. My question is what is the best way to do this? I tried jumpering the ctr1 terminals into Dev1/ai0 in both RSE and NRSE configurations but this doesn't seem to work well as an unwanted voltage gets fed back on the ctr1 line. Do I need to dedicate one of the channels on our 1102 cards for this purpose instead? Thanks in advance for your help. -drew

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We are going to hook up an oscilloscope next week to try and debug this problem. I'll let you know what I find.

-drew

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