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REVIEW - Rigol DS2072 - First Impressions of the DS2000 series from Rigol
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Electro Fan:

--- Quote from: marmad on May 17, 2014, 12:59:55 pm ---I found another new feature in FW v.3 - something we've been asking them for over the last year - and although it's a baby step by Rigol, at least it's a baby step in the right direction:

The External Trigger input can now (finally) be used for a second trigger type: PULSE
- how would you wire this up to demonstrate this?

This would help explain Teneyes' earlier discovery that the Ext. Trigger can now be used as a source for the counter: it seems to go hand-in-hand with adding pulse measuring capabilities.
- how would you wire this up to demonstrate this?

An encouraging sign... let's hope they keep adding more triggers it can be used as a source for.

--- End quote ---

Thanks
Teneyes:

--- Quote from: Electro Fan on May 17, 2014, 10:46:07 pm ---the Ext. Trigger can now be used as a source for the counter:
- how would you wire this up to demonstrate this?

--- End quote ---
Here is 1MHz on Ch1 , with  a 250KHz ,phase locked to the 1Mhz and connect to the External Trigger.
Note:  The Trigger is set to Rising edge on the External input. but the trigger point is the falling part of the Sine wave.
# 2 showing what was on the External input
Circlotron:
Teneyes, can you show us the same test using square waves, say from a synchronous binary counter chip? If there is a difference there, that would be serious.
marmad:

--- Quote from: Circlotron on May 19, 2014, 01:32:40 am ---Teneyes, can you show us the same test using square waves, say from a synchronous binary counter chip? If there is a difference there, that would be serious.

--- End quote ---

What do you mean? Serious in what way?
Circlotron:
It would mean something is way wrong. With a sinewave input maybe there is some phase shift in the external analog circuit, but inputting two square waves with known identical corresponding transitions every 4 cycles, only different in frequency, it is a very easy test to reproduce, and if an anomaly shows up, then yeah, theres problems alright.
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