The only software we know of that could somehow convert or at least work with both .sm3 and .sm2 files, would be XPMPro spectrum analyzer. Probably used or attempted to resave version 3 to version 2 of the same format.
Home > Search converters: sm3 to sm2
Conversion of sm3 file format to sm2 file format beta
Search for sm3 to sm2 converter or software able to handle these file types.
Convert RHK Technology proprietary file format to RHK Technology proprietary file format.
We have found one software suitable in our database for this conversion.
Microsoft Windows software 
- convert sm3 to sm2 on Windows
XPMPro
A spectrum analyzer for Windows
File extension | Convert | Open | Save | Edit | Create | Import | Export | Extract |
|---|---|---|---|---|---|---|---|---|
Convert from sm3 file | No | Yes | Yes | sm3 editor | Yes | No | No | No |
to sm2 file | No | Yes | Yes | sm2 editor | Yes | No | No | No |
The table with program actions contains information about what each program is capable of doing with their files. This may be a good pointer for further searches for certain file conversions and help you find the converter you are looking for if our search result is insufficient for you. However, it is far from perfect and may sometimes show results which are not really usable because of the nature of the software handles the files. So a conversion that appears as possible, just because of matched actions, may in fact not be possible.
Additional links: Open sm3 file, Open sm2 file
SM3
An sm3 file extension is related to the XPMPro software and used for its data file format.
SM2
Files with sm2 extension are connnected with XPMPro. They store saved data from the application.
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