Table 3-2. Laser Simulator Troubleshooting - Continued
Connect oscilloscope vertical input to circuit card E3 (-) and E5 (+) using x 10 probe.
Use a hood on the scope. The pulse will appear very dim because of the
slow repetition rate.
Set oscilloscope controls to measure the following pulse width at 50% amplitude level.
(Vertical input 0.1 volt cm, horizontal 0.1 sec cm.)
Pulse width is 0.025 to 0.125 sec.
Pulse width is high or low.
Connect counter E3 (common) and E5 (signal) to circuit card using a shielded lead.
Set up counter to measure the (approximately 50.1 msec) period T1.