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Author Topic: Accuracy of 774 ABC Melbourne frequency?  (Read 1113 times)

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Offline CirclotronTopic starter

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Accuracy of 774 ABC Melbourne frequency?
« on: May 12, 2018, 11:26:11 am »
Trying to zero beat the function generator by ear to the above station. Fades to a minimum every 1 minute 8 seconds with f/g set to 773,999.832 Hz. That set frequency is about 0.2ppm difference from the nominal 774KHz. How accurate might that particular station have it's carrier frequency set to?
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Offline dave_k

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Re: Accuracy of 774 ABC Melbourne frequency?
« Reply #1 on: May 12, 2018, 11:48:41 am »
Broadcasting Services (Technical Planning) Guidelines 2007, Appendix 1

"Unless otherwise specified, the frequency of the carrier shall be maintained within ±10 Hz."

Seems as though they are well within spec...
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Offline German_EE

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Re: Accuracy of 774 ABC Melbourne frequency?
« Reply #2 on: May 13, 2018, 08:12:16 am »
10 Hz, try harder, I can measure down to 0.1 millihertz at home.
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