Can someone explain to me what are PL Tones? What are they used for and should I put them in my scanners? Are they used only for conv. freq's?
PL is a Motorola trademark (short of "Private Line" and is the equivalent of GE's Channel Guard. The technical name for it is Sub audible Tone Coded Squelch. It is just low frequency tone that is transmitted along with the voice modulation. The receiver looks for the tone and only un-squelches when that tone is heard.Can someone explain to me what are PL Tones? What are they used for and should I put them in my scanners? Are they used only for conv. freq's?
. . . .It does the same thing as PL except that with PL there are only about 60 different tones used and DCS can give 256 codes.
Actually, there are 512 logically possible DPL codes. However, to avoid falsing, only 83 of them are considered valid. See:
http://www.midians.com/pdf/tone_signaling.pdf
Actually, there are 512 logically possible DPL codes. However, to avoid falsing, only 83 of them are considered valid. See:
http://www.midians.com/pdf/tone_signaling.pdf
This link lists paging tones, not PL tones. Is this the link you meant to post? Anyway, I thank you for the link and the info. I have saved the pdf file for future reference.
What are they used for and should I put them in my scanners?