The probes of his oscilloscope — a no-frills ... of twiddling to get into X-Y mode and to get the trace aligned. Of course it’s not just diodes that can be tested with a curve tracer, and ...

This guarantees that something will be displayed. Normal trigger mode arms the oscilloscope for a trigger. When the trigger event occurs, it acquires a trace which is then displayed. After the ...

There were no lights, no screen trace, and a brief hiss sound when it ... Removing the big caps provided access to a row of diodes, which revealed the culprit: a single shorted diode.