WRXR374 Posted September 22 Report Share Posted September 22 How many different parties using different tones can "share" a GMRS channel? Quote Link to comment Share on other sites More sharing options...
0 kidphc Posted September 22 Report Share Posted September 22 Wouldn't recommend. With tones you don't get more bandwidth. All the parties will stomp on each other during transmission without knowing.Once carrier is being used, irregardless of tone the frequency is being used.Tones just ignore the transmissions and doesn't break squelch unless the tone matches.Sent from my SM-S901U using Tapatalk WRUU653 and SteveShannon 1 1 Quote Link to comment Share on other sites More sharing options...
0 WRXR374 Posted September 22 Author Report Share Posted September 22 2 minutes ago, kidphc said: Wouldn't recommend. With tones you don't get more bandwidth. All the parties will stomp on each other during transmission without knowing. Once carrier is being used, irregardless of tone the frequency is being used. Tones just ignore the transmissions and doesn't break squelch unless the tone matches. Sent from my SM-S901U using Tapatalk Thanks. I sorta understand about how it isn't really "private". I'm just wondering... if I'm talking to someone with one tone, and two other people are talking to each other on another tone, what effect does that have on each of us? What happens if a third pair starts using a third tone? Over2U 1 Quote Link to comment Share on other sites More sharing options...
0 kidphc Posted September 22 Report Share Posted September 22 Whom ever has the stronger signal wins. Hence the stomping comment, sorry this is how fm/digital fm work. The other transmissions will be lost. This is irregardless of tones. You put tones in people just wonder why transmissions aren't getting through or seriously broken up at times.If you are sharing a frequency between parties you will want a business license or amateur radio license and utilize dmr/moto turbo. This was designed to reduce collisions via color codes and time slots.Sent from my SM-S901U using Tapatalk WRUU653 1 Quote Link to comment Share on other sites More sharing options...
0 Tip10 Posted September 22 Report Share Posted September 22 Same effect as two transmitters keying up on the same channel with out tones, or three all keying up at same time when you add in the third.Tones really do NOTHING on transmit except add tones to the transmit - they tones only allow you to set your receiver to ignore transmissions. Never engage in a battle of wits with an unarmed person. Quote Link to comment Share on other sites More sharing options...
0 SteveShannon Posted September 22 Report Share Posted September 22 11 minutes ago, WRXR374 said: Thanks. I sorta understand about how it isn't really "private". I'm just wondering... if I'm talking to someone with one tone, and two other people are talking to each other on another tone, what effect does that have on each of us? What happens if a third pair starts using a third tone? This has nothing to do with privacy. When two FM signals are in proximity and use the same frequency, regardless of any tones, they can interfere with each other. FM also has what’s called a “capture effect”. Your radio will lock onto the stronger of the two signals. Again, “privacy tones” have nothing whatsoever to do with this. WRQI663 and WRUU653 2 Quote Link to comment Share on other sites More sharing options...
0 Socalgmrs Posted September 22 Report Share Posted September 22 As many as there are analog and digital tones. Now after a few and depending on traffic you will start to run over each other Quote Link to comment Share on other sites More sharing options...
0 amaff Posted September 22 Report Share Posted September 22 What all of them already said. All of my radios have a bank of channels with semi-random tones (but they all match, if that makes sense). The goal is find a quiet channel so you're not stepping on a bunch of other people (and vice versa), and then everyone running the same channel / tone pair can hear each other. When I'm out with friends we'll usually have a primary and a secondary channel ready to go in case someone's already using the primary we picked, so that everyone knows where to go. kirk5056 1 Quote Link to comment Share on other sites More sharing options...
0 WRXL702 Posted September 22 Report Share Posted September 22 DCS & CTCSS (PL /DPL Motorola Term) Coded Squelch Types Are Exactly That. A Coded Squelch That Eliminates Your Radio From Hearing Co-Channel Users On The Same Frequency Or GMRS Channel. There Are Several "Tones" Available. That Does Not Give An Exclusive Use Of That Shared Frequency, Just Enables Your Radio Not To Receive The Co-Channel (Same Frequency) Transmissions. So To Answer Your Question, After Explanation - Several "Parties" Will Sill Be On A "Shared" GMRS Frequency Use. Quote Link to comment Share on other sites More sharing options...
0 TrikeRadio Posted September 22 Report Share Posted September 22 As people have already stated, yes the stronger signal will stomp on other transmissions that are weaker in spite of tones. It can distort or cause distortion on the other tone transmission. and if a user is not using a tone on receive (only transmitting on a tone, they will for sure hear the other party in open if it is stronger than the one they intended to hear. Two groups on the same channel/frequency CAN use it together with different tones but it is never likely to be ideal. Quote Link to comment Share on other sites More sharing options...
0 dosw Posted September 23 Report Share Posted September 23 There are some nuances I haven't seen mentioned. One is that the "strongest signal" is the strongest from the perspective of the receiver. Another is that two comparable signals will cause strange intermodulation. You hear that when two kids both key up their cheap FRS radios at the same time in different rooms of their house.A nearby listener will hear odd sounding interference. Last, even if you have squelch tones set on your receiver, you may still hear unwanted transmissions. Sometimes someone will transmit the code necessary to open squelch on your receiver but the stronger (different, unwanted) signal will be what you actually hear. AdmiralCochrane, TrikeRadio, kirk5056 and 2 others 5 Quote Link to comment Share on other sites More sharing options...
0 WRQI663 Posted September 24 Report Share Posted September 24 You do realize there is a monitor button - to hear if someone is transmitting (before you do)? Quote Link to comment Share on other sites More sharing options...
0 nokones Posted September 24 Report Share Posted September 24 If the subject repeater stations are within the same capture-affect zone would not transmit a tone or code and run CSQ on the downlink and all the mobile stations would cooperate and share alike and play nice, it would work out very well. In otherwords, no simultaneous transmissions from the mobile stations. Have patience and be courteous and considerate to others. SteveShannon and WRXB215 2 Quote Link to comment Share on other sites More sharing options...
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WRXR374
How many different parties using different tones can "share" a GMRS channel?
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