Sound Reinforcement - Forums for Live Sound Professionals - Your Displayed Name Must Be Your Real Full Name To Post In The Live Sound Forums > LAB: The Classic Live Audio Board

Shure and AKG antenna

<< < (2/2)

Bill Hardy:
Thanks everyone for your input, very helpful.
One more question though, I never run my antennas more than around 30' from receivers, and combiners, would a passive or active antenna be better for application, what is the advantages and disadvantages for either one?
Thanks Bill

Mac Kerr:

--- Quote from: Bill Hardy on February 22, 2011, 04:46:15 PM ---Thanks everyone for your input, very helpful.
One more question though, I never run my antennas more than around 30' from receivers, and combiners, would a passive or active antenna be better for application, what is the advantages and disadvantages for either one?
Thanks Bill

--- End quote ---

The advantage of an active antenna it the higher gain. However, higher gain can also be a disadvantage it you don't actually need it, and second, points of nonlinearity (amplifiers) are where intermod products are generated. Having fewer points to generate intermod products is always good, and not amplifying signals you don't want is also good. If your antennas are close to the stage, and you use good low loss antenna cable, passive is probably better.

Mac

Brian Ehlers:

--- Quote from: Karl Winkler on February 22, 2011, 03:36:08 PM ---Any 50 Ohm UHF-band antenna will work. RF is RF, as long as you have the right connector (BNC).
--- End quote ---
But is RF all Bill has to worry about?

Mac's comment about active antennas made me think about how some wireless receivers and antenna distribution boxes supply a DC voltage on their antenna inputs to provide power to devices further upstream.  Even if the devices further upstream don't need the DC voltage, they need to tolerate it and not short it out.

I have no idea if this is an issue with the specific equipment Bill is considering, but it's always important to keep in mind when designing a wireless system.

Navigation

[0] Message Index

[*] Previous page

Go to full version