Can't get SCPI to get part of capture buffer

[JohnnyMalaria]

Hi,

According to the SCPI documentation, it should be possible to request part of the data in the capture buffers. However, the documentation is very confusing. The definition to receive data between start_pos and end_pos is given as:

Code: Select all

ACQ:SOUR<n>:DATA:STA:END? <start_pos>,<end_pos>

but the example is:

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ACQ:SOUR1:GET:DATA 10,13

Query return:
{123,231,-231}

which is totally different.

I have tried both in my Python code - neither work. Instead, execution hangs.

The command to get the whole buffer

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ACQ:SOUR1:DATA?

works just fine.

What is the correct syntax for retrieving data between specified locations?

Thanks,

John.

[JohnnyMalaria]

UPDATE - I found a way around this.

I use this instead:

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ACQ:SOUR1:DATA:STA:N? 1234,256

i.e., retrieve 256 data points starting at 1234.

I don't understand why the earlier method doesn't work.