The GFT632 module is an external triggered up to 70 V pulse generator. This compact module produces up to 70 V under 50 Ω fast 2 ns rise time square pulses.
The output amplitude can be adjusted (trimpot) in factory from 15 V to 70 V. The output width can be also adjusted in factory from 50 ns to 1 µs.
Typical GFT632 application would be to amplifier the output of digital delay generator. In this way the module can be at 20 meters from delay generator and near the device to trigger.