How to synchronize trigger the start and stop of 4 timer/counter(with different duty cycle) ?

Hi, every Sir :

I am using cDAQ 9174 + NI 9402 to generate some relate triggers for instruments controls.

To generate the 4 DO wave with 4 counters, like this:

For the delay between channels, should be adjustable in us level.  like this:

But for default setting with interlock, 4 channels are not synchronized, the time uncertain in ms level.

So how to synchronize trigger the start and stop of  4 timer/counter(with different duty cycle)?

I noted the related topics, for examples thise use arm start trigger somethings.

but  cDAQ 9174 + NI 9402 maybe not have those ai/ao start trigger.

Is any triggers internal to control the start and stop of  4 timer/counter?

for example, an another counter inner-directedto trigger this start and stop?

Any suggestions are welcome, VI, DAQmx.....