This module generates a specific pulseshape (<0.3nS ns rise, 1V in 50 ohm) according to a fibre coupled logic pulse send via a commercial line-powered pulseunit. Levels (pos<>zero<>neg) can be controlled via the DACs (D5-unit).
As a result a battery-powered low noise pulser is created in which the timing (T0,T1) can be controlled by the commercial pulser and offset and amplitude can be set by the biasdacs or modulated (lock-in) via the iso-amps.
A fibre emitter can be connected to every commercial generator capable of generating at least 0..+3V in 50ohm. The emitter is powered by the signal itself. The emitter has a BNC/SMA input and a FSMA fibre output.
Frontpaneldrawing
measured output (-10dB atten)on 34 GHz scope
zoom on leading edge R1(0.2nS) L2 R2 on 34GHz scope
