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What’d the difference between CSQ, TPL and DPL?

April 26, 2017csq difference dpl what’d

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What’d the difference between CSQ, TPL and DPL?

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A. CSQ or Carrier Squelch is communications with no codes. Codes help filter out unwanted transmissions. TPL or Tone Private Line modulates at a low frequency. DPL or Digital Private Line modulates a series of binary codes. Both users must be on the same TPL or DPL to communicate. The term Private does not mean unheard. Anyone that can monitor or that has CSQ can hear your transmission, if they are on the same frequency.