Guessing SCPI Commands

[paul_a_cardinale]

I have a cheap scope made by an unresponsive company, and I have partially accurate documentation.

Where the scope doesn't behave as documented, I try to guess the SCPI commands (with limited success).

Is there somewhere a reference that lists variants of common commands?  (It would help me with my guesses.)

At the moment, I'm working on the trigger mode.  Here's what the doc says:

[santo_13]

There's high chance that they copied the commands from reputed manufacturer such as Tektronix, Keysight. So, if you got access to some AI, feed it the programmer's manual of a few of the similar featured models and ask for the commands.

[hanamaru]

If you could share the product name and model, someone may be able to recognize it and assist you.

[paul_a_cardinale]

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@hanamaru wrote:

If you could share the product name and model, someone may be able to recognize it and assist you.

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It's a Hanmatek DOS1102.

[cstorey]

I'd start by looking at a similar level Keysight scope as an example, or maybe a Tektronix.  They both good adherence to standards and documentation for their scopes you can download.

You could also download Keysight IO which has all the SCPI commands for all the instruments available, you just install dummy versions of the ones you are interested in and see the commands and paramater limits.

There are also repositories for outdated instruments like.. https://www.eevblog.com/forum/testgear/keysight-dsox1200a-g-list-of-scpi-commands/

But my guess is some university has a copy of the manual you want on-line somewhere if you search hard enough.  Sometimes auction sites will sell them for a few $.

Good luck.

Craig

[cstorey]

You could try a post to EEVblog where they review that model to see if there's more documentation available

- https://www.eevblog.com/forum/testgear/wow!-$123-hanmatek-dos1102-initial-comments/

Craig

[paul_a_cardinale]

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@cstorey wrote:

I'd start by looking at a similar level Keysight scope as an example, or maybe a Tektronix.

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Those are my usual starting guesses.   Sometimes they don't pan out.

[avogadro5]

You may be able to discover more commands via headers, on a tektronix scope this returns a complete list of commands under :DIS...

The returned string follows the SCPI tree traversal syntax, which I'm not finding a concise document for and I don't have an example but sibling commands will be grouped and then followed by a colon to reset to the tree root.

[cstorey]

What response are you getting?

[paul_a_cardinale]

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@avogadro5 wrote:

You may be able to discover more commands via headers, on a tektronix scope this returns a complete list of commands under :DIS...

The returned string follows the SCPI tree traversal syntax, which I'm not finding a concise document for and I don't have an example but sibling commands will be grouped and then followed by a colon to reset to the tree root.

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I get nothing back.