I have a Digitor 20 MHz (ex Dick Smith) oscilloscope which I bought some years ago when money was burning a hole in my pocket. I unpacked it the other day to familiarize myself with it. I tested various components, resistors, capacitors, diodes etc. and found that I got two quite different respones fro LEDs. Some generated the right angled trace supposedly typical of diodes while some generated the 9 o'clock flat portion of the trace but the other half angled off to about 1.30. The Zener diode that I tested responded as though it was an ordinary diode. Informative comment would be much appreciated.
R