RE: [Hamlib-developer] DCS, TONE, CTCSS, 1750; Who knows what el

[Chuck H. <n2...@am...>]

Looks to me, looking at the manual (I don't have a TS2k) that:

Tone: transmit a tone
CTCSS: check for tone on receive and only pass audio on receipt of the tone
DCS: Digital Coded Squelch

Many repeaters will pass or generate a tone on transmit.

This can be used (with CTCSS receive):
a. If there is noise on the frequency, you can open the squelch and only listen
   if there is a tone.
b. If there are multiple repeaters that you can hear on a given frequency with
   different tones.
c. Many times the repeater only transmits the tone when passing audio, so you
   don't have to listen to the tail and/or repeater ids.
d. On a simplex frequency if the users you want to talk to all transmit the
   tone, you only hear them.
e. On a repeater that doesn't use a tone and passes any tones it hears, you can
   do the same as d over it.

Many radios only let you select one tone, and then give you the option of
transmitting it, checking for it on receive, or both.  Looks like the TS2k gives
you the option of transmitting one tone, and checking for a different one.  I
can see where this might be useful in certain places, but I haven't heard of
anyone actually using it that way.

Hope this makes sense and helps explain things.