[opendtv] Re: News: Shure Wants White Space Tests at Pats-Ravens Game
- From: Richard Hollandsworth <holl_ands@xxxxxxxxx>
- To: opendtv@xxxxxxxxxxxxx
- Date: Mon, 19 Nov 2007 15:40:08 -0800 (PST)
In the first OET tests, the WSD devices took a long time to search all UHF
channel positions.
They apparently need to dwell on each channel position for several seconds in
order
to achieve the desired sensitivity.
In order to detect a mic being activated on a presumed "unused" freq after the
initial scan, WSD devices will need to continually rescan on what is now a WSD
operational freq, looking for a late mic (et. al.) arrival.
The WSD tests should be conducted in an "operational" environment,
whereby the devices are kept busy receiving data (at max throughput rate) in
order
to truly evaluate "scan while operate"....if it's even implemented in the
prototypes....
To do otherwise is simply testing the initial, off-line, scan function.
Of course, we can already see the glowing press releases being written now,
claiming that everything is working perfectly---despite the very limited and
artificial
construct of the proposed NFL test---just as they are trying to paper over the
miserable results from the earlier OET tests....
holl_ands
======================================
Craig Birkmaier <craig@xxxxxxxxx> wrote: At 5:50 PM -0500 11/17/07, Albert
Manfredi wrote:
>Not exactly a good test. Should work fine, unless someone happens to
>be trying to watch the game on TV, a couple of feet from the mike.
>Which is not very likely.
Uhhhhhh Bert...
The test is to determine if the WSDs are able to detect the use of
the channel(s) that are being used for the wireless mics. I believe
they will test the ability of the WSDs to detect the mic signals, but
will not use the transmit capabilities of the tested devices.
Apparently its not just the full power stations that are wary of the
WSDs. The wireless mics use known unused channels ( at least when the
people using them take the time to work with the local frequency
coordinator).
Given the low power at which these mics operate, this should be an
interesting test.
Regards
Craig
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