crazy_19
Member
Does anyone know how to tell whether a transmission is narrowband or not.
How to tell
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Doesn't matter, most are and the few that aren't soon will be so set your bandwidth to narrow and forget it.
nd5y
Member
What frequency is it? A few services will remain wideband.
Look at the FCC license data and see what they are licensed for.
Compare the audio levels to a known wideband station like a NOAA weather station. If the audio is way lower than a known wideband station then it is narrowband.
Measure the deviation with a service monitor. (Most people can't do that)
Sometimes you can't tell. A wideband radio may only put out 2.5 kHz or less deviation if it isn't adjusted properly or the user is too far from the micrphone. A narrowband radio may put out more than 2.5 kHz deviation if it isn't adjusted properly.
Look at the FCC license data and see what they are licensed for.
Compare the audio levels to a known wideband station like a NOAA weather station. If the audio is way lower than a known wideband station then it is narrowband.
Measure the deviation with a service monitor. (Most people can't do that)
Sometimes you can't tell. A wideband radio may only put out 2.5 kHz or less deviation if it isn't adjusted properly or the user is too far from the micrphone. A narrowband radio may put out more than 2.5 kHz deviation if it isn't adjusted properly.
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