Sunday, July 15, 2012

Premature DRM transmission on 9630 kHz

I was just looking over the signal environment in advance of REE DRM at 0:00 UTC.


On the lower 5 kHz there's some irritating tac-tac-tac interference, around -130 dBm. But there also appear to be a carrier at 9630 kHz (which should be suppressed for DRM) as well as what could be two pilot tones.

Usually there is an actual double sideband station at 9625 kHz, CBC Radio Nord Quebec, that caused interference problems in the past. It doesn't seem to be broadcasting at the moment, or anymore? Maybe the FM relays that were supposed to take over from Sackville are now online.

Suddenly, someone must have jumped the gun and fired the DRM broadcast.


Which was short-lived, but Dream actually acquired frame sync and was reporting about 10 dB SNR before someone realized their mistake.

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