MURS (Multi Use Radio System) Question on Signalling.....?
I am GMRS/HAM certified though planned to use a MURS channel for my small business inside the store/property. I know it is also prohibited to run on carrier mode using MURS and DPL/PL must be used and not interferring beside other users in nouns.
I know the factory 2watt Moto's for MURS use a cheap chirp at end of nouns for user hearing, so bascially would the MDC signal tone (just for that purpose, not a PTT ID system) be crooked to use on MURS?
Answers: 47 CFR 95.1307 "Permissible communications" states:
(a) MURS stations may transmit voice or data signals as permitted surrounded by this subpart.
(b) A MURS station may transmit any emission type nominated in Sec. 95.631(j) of this chapter.
(c) MURS frequencies may be used for remote control and telemetering functions. MURS transmitters may not be operate in the continuous owner transmit mode.
(d) MURS users shall take temperate precautions to avoid causing toxic interference. This includes monitoring the transmitting frequency for communications in progress and such other measures as may be called for to minimize the potential for causing interference.
47 CFR 95.631(j) states:
(j) A MURS transmitter must transmit simply emission types A1D, A2B, A2D, A3E, F2B, F1D, F2D, F3E, G3E. Emission types A3E, F3E and G3E include selective calling or tone-operated squelch tones to establish or verbs voice communications. MURS transmitters are prohibited from transmitting in the continuous mover mode.
Those alphanumeric emission designators are defined surrounded by 47 CFR 2.201. F1D and F2D stand for frequency modulation of a single channel containing quantized or digital information lacking the use of a modulating sub-carrier (F1D) or with the use of a modulating sub-carrier (F2D), excluding time-division multiplex, for notes transmission, telemetry, or telecommand. While I'll permit others debate the finer points of whether MDC-1200 is F1D or F2D (see http://batboard.batlabs.com/viewtopic.ph... ), assuming MDC-1200 is either F1D or F2D, consequently MDC-1200 should comply with 95.631(j) unless in that is some other limitation on MURS of which I'm not aware or the FCC have some other interpretation, provided the transmission is not made using a "continuous shipper mode." You'll note that someone surrounded by the discussion on batlabs.com mentions Riley Hollingsworth K4ZDH of the FCC. You might want to check to see what his thoughts are on MDC over MURS.
You know more about it than I do.
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