Friday, March 03, 2006
Why aren't WMUB and WVXU in sync?
I am curious why WMUB and WVXU both broadcast "live" programs such as Prairie Home Companion, but they are not synchorinized. There is a fractional difference in time between the two stations. Which one os operating with a delay, and why? Or are both operating with a delay?
--Gene Willeke, Oxford
--[You are very observant. Actually the time difference between WVXU and WMUB on many programs is about 8 seconds. This is a result of the fact that WMUB is operating with the new "HD Radio" digital system. The issue is that the digital signal takes that long to be decoded by the radios that can hear it. The system involves a blend between the digital and analog for the fringe areas where the digital will drop out. In order for that blend to work correctly, the analog signal needs to be delayed by the same amount as the digital.
In the very near future, we expect WVXU to turn on a digital signal as well as many stations are doing.
So, the bottom line is: The time discrepancy you are hearing is because WMUB is more technologically advanced (for now) than WVXU and some of the other area stations.
-- John Hingsberben, program director]
--Gene Willeke, Oxford
--[You are very observant. Actually the time difference between WVXU and WMUB on many programs is about 8 seconds. This is a result of the fact that WMUB is operating with the new "HD Radio" digital system. The issue is that the digital signal takes that long to be decoded by the radios that can hear it. The system involves a blend between the digital and analog for the fringe areas where the digital will drop out. In order for that blend to work correctly, the analog signal needs to be delayed by the same amount as the digital.
In the very near future, we expect WVXU to turn on a digital signal as well as many stations are doing.
So, the bottom line is: The time discrepancy you are hearing is because WMUB is more technologically advanced (for now) than WVXU and some of the other area stations.
-- John Hingsberben, program director]
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