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Motorola T7200 won't receive from other radios?
- Thread starter Epeescott
- Start date
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I verified in the manuals of the radios that the frequencies are indeed the same on all the radios, both for Tx and Rx (why transmit might be different from receive, I don't know)......
Subcode? I don't know what that is, unless it is a encrypt type feature.
What is a PL Tone?
Subcode? I don't know what that is, unless it is a encrypt type feature.
What is a PL Tone?
n1das
Member
The "Interference Eliminator Code" is a fancy name for a PL tone.
Code #1 = 67.0Hz This appears to be Motorola's default tone.
Setting the code to zero turns off the feature and your T7200s are listening in carrier squelch mode (CSQ) and they won't be encoding a tone on transmit. Also, cheaper radios will still hear you, whether or not you're using the "interference eliminator code" feature. Using the tone-coded squelch system in your radios does not make your transmissions "private". Everybody else can still hear your transmissions. It simply relieves you of having to listen to all the other chatter on the channel that you're sharing with others. Your T7200 is actually still receiving those other transmissions, the difference is the radio will stay muted on those transmissions that aren't transmitting the same subaudible tone your radio is set to decode. Your radio will only unmute the speaker audio when it hears transmission(s) transmitting the correct tone. A more accurate name for this feature should be "Inteference IGNORING codes".
See also: http://wiki.radioreference.com/index.php/CTCSS
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n1das
Member
It isn't encryption either. The scramble feature is simple analog audio inversion scrambling....not secure at all.
n1das
Member
The T7200 only has the standard 38 CTCSS/PL tones. It has no DCS/DPL capability.
See also: http://wiki.radioreference.com/index.php/DPL
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