Eric Lemmon wrote: > Tom, > > The TIA-recommended standard deviation for CTCSS is 500 Hz on a 16K0F3E or > 20K0F3E emission. Most CTCSS decoders can reliably detect tone deviated as > low as 100 Hz. Any deviation greater than 500 Hz can be considered > excessive. >
The TIA spec is for +/- 500Hz deviation *minimum*. Any less then 500 is considered inadequate. 800-1000 Hz is a maximum. So anywhere between 500 and 800-1000 is right.
