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Old July 7th, 2006, 08:43 PM   #1
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A wireless gem...

Every once in awhile, you find a gem on the internet that could be very helpful. This one is and so I am going to make it a sticky for now.

Sennheiser has a page called 'Frequency Finder" that will show you the allocation of UHF channel frequencies in your area to assist with using their UHF wireless systems without interference. All the new DTV channel assignments are in the UHF TV channel spectrum and so are their wireless UHF mics so they pulled this information together to help their users.

Take a look...

http://www.sennheiserusa.com/newsite...inder-open.asp

-gb-
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Old July 7th, 2006, 09:28 PM   #2
 
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Flip a quarter, it's about as useful (or useless).

Seriously, there is a lot of hype about channels, available bandwidth, etc from some of the wireless manufacturers, and the Sennheiser chart falls to a large extent, into that definition. If you want it as a sticky, that's fine, but caveat emptor.
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Old July 7th, 2006, 09:46 PM   #3
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Quote:
Originally Posted by Douglas Spotted Eagle
Flip a quarter, it's about as useful (or useless).

Seriously, there is a lot of hype about channels, available bandwidth, etc from some of the wireless manufacturers, and the Sennheiser chart falls to a large extent, into that definition. If you want it as a sticky, that's fine, but caveat emptor.
I couldnt agree more,

I went off that chart when I bought my senns and I had nothing but problems from stations that were not included on the chart. I bought another pair about a month ago and chose a different freq set and they work alot better in my area even though the chart said otherwise.
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Old July 7th, 2006, 09:49 PM   #4
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My Shure wireless system came with a chart, but I have only glanced at it and have never taken it with me on a gig, When I set-up at a new location I look at the RF signal led display on my Shure Wireless. If any signal is present and my transmitter is off I start moving the group and channel until the LEDS are dark then I am OK. I made a mistake once and thought I could 'capture' a weak 1 led signal with my lav transmitter. It worked in test, but when the program started the competing signal muted my audio output. I hate that sinking feeling when the heads of the audience all turn around and look at the sound guy. Like SWA's, "Wanna get away?" Now I always make sure there is no signal present, not even a weak one
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Old July 7th, 2006, 10:00 PM   #5
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Caveat emptor always applies, and frequency charts aren't any guarantee of the useability (or not) of a particular frequency in a particular location. I gather that the newer frequency-hopping technology has reduced the concerns at least a bit -- if one freq is taken, there's usually (but not always) a bunch more nearby in the electromagnetic (EM) sprectrum that the device can sniff out. But, FWIW, I personally did find these charts to be a helpful guide when I was shopping for a lav:

http://www.dvinfo.net/conf/showthread.php?t=31301

And it does appear that Senn do periodically update the info, as most of what's on their charts is dated more recently than my lav purchase. EM pollution is a fact of life, so yes, caveat emptor.
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Old July 7th, 2006, 11:14 PM   #6
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Quote:
Originally Posted by Douglas Spotted Eagle
Flip a quarter, it's about as useful (or useless).

Seriously, there is a lot of hype about channels, available bandwidth, etc from some of the wireless manufacturers, and the Sennheiser chart falls to a large extent, into that definition. If you want it as a sticky, that's fine, but caveat emptor.
Sorry DSE, I thought it was useful info. My bad. I'll unsticky it. Apparently from the replies, everyone else feels it is useless also.

-gb-
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