Difference between revisions of "File format:Tektronix WFM"
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Uwe Hermann (talk | contribs) m (Uwe Hermann moved page File format:Tek WFM to File format:Tektronix WFM without leaving a redirect) |
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{{DISPLAYTITLE:File format:Tek WFM}} | {{DISPLAYTITLE:File format:Tek WFM}} | ||
The '''Tektronix WFM''' format is a special format used by the Tektronix TDS series scopes. It uses less space than the CSV/Matlab export functions provided. | |||
The | |||
== Header == | == Header == | ||
| Line 11: | Line 10: | ||
|- | |- | ||
| 0 - 1 | | 0 - 1 | ||
| Magic | | Magic bytes | ||
|- | |- | ||
| 2 - 5 | | 2 - 5 | ||
| Format | | Format code | ||
|- | |- | ||
| 6 | | 6 | ||
| Length of | | Length of data, unsigned integer (so far always 4) | ||
|- | |- | ||
| 7 - 11 | | 7 - 11 | ||
| Line 23: | Line 22: | ||
|- | |- | ||
| 12 - 15 | | 12 - 15 | ||
| Another | | Another magic | ||
|- | |- | ||
| 16-20 | | 16-20 | ||
| Length of | | Length of header + data (big endian, signed integer) | ||
|- | |- | ||
| 21 - 28 | | 21 - 28 | ||
| Vertical | | Vertical position (double) | ||
|- | |- | ||
| 29 - 36 | | 29 - 36 | ||
| Horizontal | | Horizontal position (double) | ||
|- | |- | ||
| 37 - 43 | | 37 - 43 | ||
| Vertical | | Vertical zoom (double) | ||
|- | |- | ||
| 44 - 51 | | 44 - 51 | ||
| Horizontal | | Horizontal zoom (double) | ||
|- | |- | ||
| 52 - 53 | | 52 - 53 | ||
| Acquisition | | Acquisition mode (signed integer, currently unknown) | ||
|- | |- | ||
| 54 - 55 | | 54 - 55 | ||
| Min | | Min max (unknown) | ||
|- | |- | ||
| 56 - 63 | | 56 - 63 | ||
| Line 50: | Line 49: | ||
|- | |- | ||
| 63 - 64 | | 63 - 64 | ||
| Vertical | | Vertical coupling (signed integer) | ||
|- | |- | ||
| 65 - 66 | | 65 - 66 | ||
| Horizontal | | Horizontal unit (signed integer) | ||
|- | |- | ||
| 67 - 74 | | 67 - 74 | ||
| Line 59: | Line 58: | ||
|- | |- | ||
| 75 - 76 | | 75 - 76 | ||
| Vertical | | Vertical unit (signed integer) | ||
|- | |- | ||
| 77 - 84 | | 77 - 84 | ||
| Vertical | | Vertical offset (double) | ||
|- | |- | ||
| 85 - 92 | | 85 - 92 | ||
| Vertical | | Vertical position (double) | ||
|- | |- | ||
| 93 - 100 | | 93 - 100 | ||
| Vertical | | Vertical gain (double) | ||
|- | |- | ||
| 101 - 105 | | 101 - 105 | ||
| Line 74: | Line 73: | ||
|- | |- | ||
| 106 - 107 | | 106 - 107 | ||
| Trigger | | Trigger position (signed integer), possibly in points | ||
|- | |- | ||
| 108 - 109 | | 108 - 109 | ||
| Header | | Header version (signed integer) | ||
|- | |- | ||
| 110 - 111 | | 110 - 111 | ||
| Sampling | | Sampling density (??) (signed integer) | ||
|- | |- | ||
| 112 - 113 | | 112 - 113 | ||
| Burst | | Burst segment length (signed integer) | ||
|- | |- | ||
| 114 - 115 | | 114 - 115 | ||
| Waveform | | Waveform source (signed integer) | ||
|- | |- | ||
| 116 - 121 | | 116 - 121 | ||
| Line 103: | Line 102: | ||
== Data == | == Data == | ||
Waveform data. Length of this segment is stored in Record length. | Waveform data. Length of this segment is stored in '''Record length'''. | ||
To reconstruct the waveform use the following: | To reconstruct the waveform use the following: | ||
y = data[i] * vertgain / 25 / 256 + vertoffset - vertposition * vertgain | |||
x = (i - (reclength*trigpos/100)) * horizscaleperpoint | |||
[[Category:File format]] | [[Category:File format]] | ||
Revision as of 12:25, 30 December 2014
The Tektronix WFM format is a special format used by the Tektronix TDS series scopes. It uses less space than the CSV/Matlab export functions provided.
Header
| Bytes | Field |
|---|---|
| 0 - 1 | Magic bytes |
| 2 - 5 | Format code |
| 6 | Length of data, unsigned integer (so far always 4) |
| 7 - 11 | Number of bytes following |
| 12 - 15 | Another magic |
| 16-20 | Length of header + data (big endian, signed integer) |
| 21 - 28 | Vertical position (double) |
| 29 - 36 | Horizontal position (double) |
| 37 - 43 | Vertical zoom (double) |
| 44 - 51 | Horizontal zoom (double) |
| 52 - 53 | Acquisition mode (signed integer, currently unknown) |
| 54 - 55 | Min max (unknown) |
| 56 - 63 | Duration in seconds (double) |
| 63 - 64 | Vertical coupling (signed integer) |
| 65 - 66 | Horizontal unit (signed integer) |
| 67 - 74 | Horizontal time per point (double) |
| 75 - 76 | Vertical unit (signed integer) |
| 77 - 84 | Vertical offset (double) |
| 85 - 92 | Vertical position (double) |
| 93 - 100 | Vertical gain (double) |
| 101 - 105 | Record length (unsigned integer) |
| 106 - 107 | Trigger position (signed integer), possibly in points |
| 108 - 109 | Header version (signed integer) |
| 110 - 111 | Sampling density (??) (signed integer) |
| 112 - 113 | Burst segment length (signed integer) |
| 114 - 115 | Waveform source (signed integer) |
| 116 - 121 | 3x Video 1 (signed integer) |
| 122 - 129 | Video 2 (double) |
| 130 - 131 | Video 3 (signed integer) |
| 131 - 163 | Preamble (???) |
Data
Waveform data. Length of this segment is stored in Record length.
To reconstruct the waveform use the following:
y = data[i] * vertgain / 25 / 256 + vertoffset - vertposition * vertgain x = (i - (reclength*trigpos/100)) * horizscaleperpoint