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tonyc / open890

A web-based remote UI for the Kenwood TS-890.
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Implement EXPAND mode #87

Closed tonyc closed 2 years ago

tonyc commented 2 years ago

Currently EXPAND mode is not implemented - when it is turned on, the scope does not align with what the radio is actually hearing.

tonyc commented 2 years ago
f (khz) span (khz) low cutoff (khz) high cutoff (khz) low delta khz high delta delta span:delta
7000 5 6992.5 7007.5 7.5 7.5 15 0.3333333333
7000 10 6985 7015 15 15 30 0.3333333333
7000 20 6970 7030 30 30 60 0.3333333333
7000 30 6955 7045 45 45 90 0.3333333333
7000 50 6925 7075 75 75 150 0.3333333333
7000 100 6850 7150 150 150 300 0.3333333333
7000 200 6799 7199 201 199 400 0.5
7000 500 - - - - -  
tonyc commented 2 years ago

For spans 5-100 khz, only render the middle 1/3 of samples received. For 200khz, render the middle 1/2. For 500 khz, just render all of what is received.

tonyc commented 2 years ago

Basic EXPAND functionality implemented in a0508087811dc280189b464760a3461a12a59470

Further work will be done in #92