Jump to content



Photo

UHF, VHF, 900mhz, 2.4ghz


  • Please log in to reply
4 replies to this topic

#1 Brad Smith

Brad Smith

    Advanced Member

  • Members
  • PipPipPip
  • 133 posts
  • Sydney, Australia

Posted 23 January 2007 - 11:17 PM

Has anybody got any gear from these guys?

http://www.avalonrf....s/selection.htm

Looks like good kit. Can anybody simplify for me the advantages of 900mhz vs 2.4ghz. Seems that most sets will have a bunch of people who'll tune into your 900mhz signal so that's a big plus...... but on the other hand if I was using a 2.4 system I could have backp senders and recievers for a fraction of the price of the good gear.

Is one frequency range inherently better than onother?

Oh yeah and the other consideration is my BFD will it still play nice if I'm using a 900mhz system?
  • 0

#2 Robert Starling SOC

Robert Starling SOC

    Advanced Member

  • Sustaining Members
  • 1134 posts
  • Las Vegas, NV

Posted 24 January 2007 - 12:45 AM

Is one frequency range inherently better than onother?


Hi Brad, I don't know about the particular sender you are referring to or the frequency used by the BFD. However, here is a link to a series of postings I wrote on RF that will give you some insight into the typical characteristics of each set or band of the spectrum.

http://www.steadicam...x...ic=3882&hl=
  • 0

#3 charlesneufeld

charlesneufeld

    Advanced Member

  • Sustaining Members
  • 170 posts

Posted 24 January 2007 - 12:00 PM

Hey Brad,

As far as I know the BFD is in the 900-927ish range - as that is the licence free band in the US. Thus, it may not work well in conjunction with a 900Mhz TX. However, choosing a channel on the BFD as far away as possible, obviously the 40Mhz rule is out of range, from the Video TX may allow them to get along.



~Charles
  • 0

#4 JimBartell

JimBartell

    Advanced Member

  • Sustaining Members
  • 494 posts
  • Long Beach, CA, USA

Posted 24 January 2007 - 02:57 PM

Oh yeah and the other consideration is my BFD will it still play nice if I'm using a 900mhz system?


This could be very problematic. The biggest problem is the video transmitter winds up in close proximity to the BFD receiver. The video TX overloads the BFD RX and reception disappears. It might be possible by very carefully positioning the units and choosing the correct channels you could get it to work but you would be playing RF roulette.

If you want to use it with the BFD I would strongly recommend you get a 2.5 GHz system.

Jim "conflict avoider" Bartell
  • 0

#5 Brad Smith

Brad Smith

    Advanced Member

  • Members
  • PipPipPip
  • 133 posts
  • Sydney, Australia

Posted 24 January 2007 - 07:00 PM

If you want to use it with the BFD I would strongly recommend you get a 2.5 GHz system.[/quote]

Thanks Jim! That makes it a pretty simple decision! (not much of a gambling man)

Thanks also Rob, I did look through the Video Assist and Video Accessories forum but I didn't catch your thread, looks like the 900mhz vs 2.4ghz debate is a bit of a mute point now, since I 'm using bfd's

Has anybody used any gear from Avalon?

http://www.avalonrf....s/selection.htm

Thanks all
  • 0




IDX

Boland Communications

Media Blackout - Custom Cables and AKS

Teradek

SkyDreams

GPI Pro Systems

Omnishot Systems

Wireless Video Systems

BOXX

PLC Electronics Solutions

PLC - Bartech

Paralinx LLC

Ritter Battery

Varizoom Follow Focus

rebotnix Technologies

Betz Tools for Stabilizers

Engineered Cinema Solutions