On 2021-06-23 14:45, Ken Hansen wrote:
I wasn't aware of that setting, I had used BCL - busy channel lockout previously
snip
Ken, N2VIP
Interesting hack. Thanks for the idea.
Classically Busy Channel Lock is used if there are multiple users of a frequency. Typically ones one may not hear due to use of CTCSS/DCS to only filter for what you'd like.
This needn't always mean different _users_, it can mean different uses. One example local to me is on one amateur radio repeater. It's both analogue FM voice repeater and also Yaesu Fusion (a digital voice mode.) The analogue FM repeater TX a CTCSS tone that analogue users enable as Tone Squelch to they needn't listen to the brraaaap of the digital voice.
One should look at the rig before transmitting in analogue FM as one may interfere with a conversation/TX in Fusion. That or enable Busy Channel Lockout.
Another example here are two analogue FM amateur radio repeaters on a SNP (Shared Non-Protected) frequency pair. They use different tones (CTCSS) on the input/output. If one only listens to one (doesn't wish to hear the other) then it's good practise to either look at lights/meters, or crack the squelch or Monitor button before transmitting. One may also simply enable Busy Channel Lockout.
Cheers es 73, John