Just to clarify, they come as separate tools or as combined logic probe and pulser. You still need two tools though if you want to transmit a pulse and use a probe elsewhere to detect it. At least without using another type of tool such as a logic analyzer or scope etc. It should state clearly if they are both tools in one and you would expect to see a pulse button on a tool that can pulse.
On some probes they have pulse or mem mode switch (which may be confusing), mem works like an auto hold on a multimeter and that is how you can detect single pulses if it's too fast to notice. Either that or as mentioned leave the probe in pulse mode and send a burst of pulses from your logic pulser.
They are fairly inexpensive unless you want the set of HP tools.