Bug 1123 - Timebase sequence incorrect for some Siglent scopes
Summary: Timebase sequence incorrect for some Siglent scopes
Status: CONFIRMED
Alias: None
Product: libsigrok
Classification: Unclassified
Component: Driver: siglent-sds (show other bugs)
Version: unreleased development snapshot
Hardware: All All
: Normal normal
Target Milestone: ---
Assignee: Nobody
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2018-02-18 18:43 CET by Uwe Hermann
Modified: 2018-02-18 18:43 CET (History)
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Description Uwe Hermann 2018-02-18 18:43:53 CET 
Some scopes, e.g. SDS1052DL+, use a different timebase set than the usual 5-2-1 sequence.

The driver currently uses this for all scopes:
        /* milliseconds */
        { 1, 1000 },
        { 2, 1000 },
        { 5, 1000 },
        { 10, 1000 },
        { 20, 1000 },
        { 50, 1000 },
        { 100, 1000 },
        { 200, 1000 },
        { 500, 1000 },

On SDS1052DL+ the following is actually correct (5-2.5-1 sequnce):

        /* milliseconds */
        { 1, 1000 },
        { 25, 10000 }, // 2.5ms
        { 5, 1000 },
        { 10, 1000 },
        { 25, 1000 }, // 25ms
        { 50, 1000 },
        { 100, 1000 },
        { 250, 1000 }, // 250ms
        { 500, 1000 },

The same applies for other timebase values.

The VDIV values *are* 5-2-1 based on this scope, however.