Hi Allen,

I am coding in C, using the Keil C51 compiler. I'm using T1 as my time reference and I basically grab a count and then I keep polling the count variable until I see 1 second has passed.

The INT4 counter is a 16 bit DATA variable. At this point I think you are right about using T2. I had thought the 6 Khz interrupt rate would be slow enough to not need to involve using T2. I think the delay introduced by opcode execution is where my skew is coming from. I'll get T2 running and see what happens on captures.

Thanks,
Dennis