I've slowly been building out a communications system for my family, a mixture of FRS/GMRS handhelds and GMRS mobile units. My goal was to program a channel into each labeled "Family" (well not on the FRS units, but you get the idea), all set to the same CTCSS code. The hardest part of this (I thought) was digging up the CTCSS frequencies for the units that only use a "code" for CTCSS, but I eventually got it all figured out. So now, my mobiles and handhelds all have a common channel which should filter out any outsiders' transmissions.
So I started testing...
And I almost immediately discovered that my Radioddity DB-20G, on which the channel is confirmed to have a CTCSS tone set (i.e. the "CTCSS/DCS Encode" and "CTCSS/DCS Decode" fields for the channel are both not empty and set to the correct frequency), the channel happily receives transmissions on that channel which have no CTCSS tone set at all...
Anyone have any thoughts as to how this could be happening?
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Blaise
Hey all,
I've slowly been building out a communications system for my family, a mixture of FRS/GMRS handhelds and GMRS mobile units. My goal was to program a channel into each labeled "Family" (well not on the FRS units, but you get the idea), all set to the same CTCSS code. The hardest part of this (I thought) was digging up the CTCSS frequencies for the units that only use a "code" for CTCSS, but I eventually got it all figured out. So now, my mobiles and handhelds all have a common channel which should filter out any outsiders' transmissions.
So I started testing...
And I almost immediately discovered that my Radioddity DB-20G, on which the channel is confirmed to have a CTCSS tone set (i.e. the "CTCSS/DCS Encode" and "CTCSS/DCS Decode" fields for the channel are both not empty and set to the correct frequency), the channel happily receives transmissions on that channel which have no CTCSS tone set at all...
Anyone have any thoughts as to how this could be happening?
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