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Author Topic: "Whoa you can't do that" - Common wireless system mistakes by Ike Zimbal  (Read 3903 times)

Pete Erskine

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Great summary of the most common RF mistakes in this month's ProSound Web.

Whoa, You Canít Do That!

Written by one of the busiest RF Coordinators around, Ike Zimbal.  Ike has just started contributing to the RF Scans around the world on my website too.

RF Scans around the world.

Article included great spectrum analyzer examples which zoom to this:
« Last Edit: February 11, 2015, 03:28:18 am by Pete Erskine »
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David Sturzenbecher

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On tapatalk the link takes me to a page for registering for a sweepstakes.  It could just be a "me" issue though.


Sent from my iPhone using Tapatalk
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Pete Erskine

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On tapatalk the link takes me to a page for registering for a sweepstakes.  It could just be a "me" issue though.
Sent from my iPhone using Tapatalk

If you win you can read the article....links work fine in browser.    Wonder why?
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Pete Erskine
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brian maddox

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Fantastic article.

I made the mistake of clumping all transmitters together on a table for years.  i think the only thing that saved me was i was very scrupulous about keeping them turned off.  But still.  wish i knew then what i know now.

And placing the receive antennas in the null of the transmits.  Why didn't i think of that?  :)

Great information in a concise, readable format.

Thanks for the link.
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brian maddox
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Brad Harris

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Fantastic article.

...

And placing the receive antennas in the null of the transmits.  Why didn't i think of that?  :)






I've found doing the opposite, firing the Tx into the null of the Rx to work better on most events that I do .... but it all depends on the numerous other factors I guess.




BRad
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Pete Erskine

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I've found doing the opposite, firing the Tx into the null of the Rx to work better on most events that I do .... but it all depends on the numerous other factors I guess.
BRad

The sensitive system is the RX.  The question is which configuration will have the least TX getting into your RX and desensitizing the Receivers.  There is an argument for both.

I avoid both possibilities and put RX at least 10' to the direct left or right of the TX however maybe this position can have adverse issues too.

I don't know any manual which has dealt with the relative RX/TX antenna placement.
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Jens Palm Bacher

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The sensitive system is the RX.  The question is which configuration will have the least TX getting into your RX and desensitizing the Receivers.  There is an argument for both.

I avoid both possibilities and put RX at least 10' to the direct left or right of the TX however maybe this position can have adverse issues too.

I don't know any manual which has dealt with the relative RX/TX antenna placement.
I'm doing my first big Sennheiser 9000 job at the moment. Bandpass filters on the RX antennas = I can put the antennas directly next to the TX antennas without problems. Oh, and the antenna adjusts its booster gain automatically.
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brian maddox

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I'm doing my first big Sennheiser 9000 job at the moment. Bandpass filters on the RX antennas = I can put the antennas directly next to the TX antennas without problems. Oh, and the antenna adjusts its booster gain automatically.

nice.
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John P. Farrell

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Re: "Whoa you can't do that" - Common wireless system mistakes by Ike Zimbal
« Reply #8 on: February 13, 2015, 12:25:18 am »

Fantastic article.  Should be a sticky!
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Erik Jerde

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Re: "Whoa you can't do that" - Common wireless system mistakes by Ike Zimbal
« Reply #9 on: February 13, 2015, 07:55:51 am »

The link is also wonky with mobile browsers, but it's not Pete's fault.  PSW isn't handling linking well on mobile platforms.  Instead of bringing you to a mobile version of the page you requested it dumps you to a different page.  Then if you go to the desktop site with the link at the bottom and then paste in the article URL you will get to the article.
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