[arm-allstar] TH-9000D CTCSS

[Patrick Perdue]

Yep, that's all it is.

Squelch is tied to COS, and I think there is no pin-out for CTCSS.

So, with CTCSS enabled on the radio, COS will happen when a tone is 
heard by the receiver, but it does take a little while to open. The 
decoder on those radios isn't exactly fast.

The good news, at least, is that COS doesn't happen with the decoder 
enabled and no tone. So it could be worse... well, except for the 
deviation on the decoders is wide enough to drive a truck through.

73

N2DYI


On 11/22/2023 10:23 AM, Chris Z via ARM-allstar wrote:

> I have both a 220 and 440 version of this radio.
> It appears that if you place the radio in CTCSS mode instead of carrier
> squelch the COS line feeding the DB9 accessory socket no longer operates.
> Has anyone figured out how to get a CTCSS signal to operate your node in
> place of the COS signal?
> Seems sort of silly not to have both a COS and CTCSS signal available.
> The socket is only 6 pins and the 5VDC pin is fine but I'd rather have
> CTCSS!
> I guess COS is literal but squelch is squelch no matter if opened by a
> carrier or a carrier with a CTCSS tone included.
>
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