Details on pulser check

A pulser is used to trigger the scanner acquisition. The ARC scanner's pulse generator (middle counting room) must be adjusted on 1000Hz for CW beam (on "external trigger" in pulsed mode, for any scanner). Check the output with a scope.

Settings for CW mode:

-frequency: 1KHz

-delay: not important in CW, should be always 0.

-time width: 10$\mu$s

-level: 2.5V on 50 $\Omega$ load, 5V on 1 M$\Omega$, polarity: + (TTL).