I found myself stuck in a testing loop while learning on-the-field how to use the Hantek oscilloscope: I was creating test cases for the oscilloscope that dubbed into test cases for accessories.
See this. The scope has a -3dB 150 MHz bandwidth, so I picked up my 14 MHz Marker Generator and tried to visualise the output terminated on a 50 ohm dummy load. The marker generator creates a short impulse in the time domain, which results in many peaks in the frequency domain. The short square impulse should be 10 ns long inside a period T of 71 ns at 14 MHz.
Grab all the probes in the lab and see which one renders better the impulse train. Don't forget to set the probe to 10x.
Probes were tested in this order:
- P6100, 100 MHz
- P6100, 100 MHz
- PK-8150, 150 MHz
- PP150B 150 MHz, Hantek
- 88025, 250 MHz, Greenpar
The first stitch below shows 4 periods of the test signal, while the second image is a zoom-in on one impulse.
According to the screenshots (wow!), all five probes behave almost in the same way! Even the input square wave show ringing.
Well, I do want to see an impulse train so I will either change the XTAL in the marker generator or use the arbitrary function generator embedded into the scope. Or both.
When time allows I will repeat the experiment with a 200 MHz Siglent oscilloscope (not mine).
