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- Version additions and changes
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- REGISTER.DOC includes the newest addition to the family, the
- 586 DTMF decoder. This version inherited some modifications to the
- decoding algorithm to make it more accurate in high-speed tone
- environments. This version exceeds performance of the 486 version,
- and it fixes the SB VE 16 problems noted in the documentation. Also,
- the threshold switch was modified to give good decoding at lower S/N.
- In fact, using the new 586 version, each system can be optimally set by
- systematically lowering the threshold until decoding errors occur. You
- can also systematically raise the threshold until improper decoding
- occurs (tone decoding dropouts). This will give you a set range of
- possible decoding thresholds to use on your system. Using this method,
- the lowest (and highest) thresholds can be determined for the system.
- The user can then set the threshold somewhere within this heuristically
- determined range in order to achieve robust tone decoding.
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