TT074 1A pulser

Source Agilent 33522A 400mV pulse 200mV offset 1 KHz 20 usec width 1 usec rise and fall time. 50 Ohm load.

TT074 load is 2.5 Ohm resistor and 2 ft of free wire.

Measuring with scope probe on leg of sense resistor.

PS = 12V

Close-up of top and bottom of pulse.  This is a tiny signal, so there's a lot of incidental RF noise, etc., but this will give you a sense of the shape of the signal: