Retriggerable buffered counting edge task

 

I am performing buffered noncumulative TTL pulses counting using NI6602 board. Basically, what I am doing is performing period measurement on Ctr0 (Configured as CIPeriodChan) using an external stable periodical signal (1MHz) connected to Ctr0Gate and a signal to measure connected to Ctr0Source. Therefore, each time when a rising edge arrives to Ctr0Gate, the counter buffers its current value, resets the count register back to zero and keeps counting until next pulse arrives to Ctr0Gate. As a result I get the number of counts registered within a Gate signal period. Ctr0 and paired Ctr1 are using 80MHz internal timebase source.

My questions are:

1. How much time does it take to register a rising edge arriving to the CtrnGate?

2. How much time does it take to "latch" the current counter value, start transferring data using DMA, reset the counter value to zero and be ready count new pulses upon registering edge on Ctr0Gate?

Specification says that the maximum frequency the counter is able to resolve is 80MHz. But is that true when performing buffered counting?

Basically, the question is what is the 'dead time' between two buffered measurements, when the counter skips incoming pulses?

 

Thank you,

Admitry