Wireless Video at DVinfo.net

James Clarke · December 11th, 2006, 07:15 PM

Hi I have been experimenting with wireless video for some time now but i stil get signal loss over a long distance say a football field, buying high end transmitters is out of the question because of the price, does anyone have any low cost solutions that are reliable

Sean Maroney · December 11th, 2006, 07:36 PM

two tin cans and some fishing line??

James Clarke · December 12th, 2006, 07:57 AM

very funny sean im serious i need help

John Miller · December 12th, 2006, 09:53 AM

What format video?

With a format such as DV or MPEG2-TS, you could set up a wireless computer network and stream the video via the network.

Standard definition DV requires about 25Mbps. Using a 54Mbps wireless network could probably just about cope.

You would have feed the DV source via Firewire to a computer. It would stream the DV via the wireless network to another computer which, in turn would send the DV back out to a suitable device via Firewire.

Tony Claxton · December 12th, 2006, 02:53 PM

This reminds me of something I was doing several years ago.

I work at a college where we were experimenting with wireless networking. We set up a wireless transceiver on a tower close to our building and I took a wireless network card and antenna home and installed them in my computer and placed the antenna in a window facing the tower. The reception was marginal (a distance of maybe 1/4 mile). I got some heavy aluminum foil and made a reflector to place behind my antenna to focus the signal. I don't have any hard data but using the monitoring software I believe I got as much as 3db and sometimes more of a boost in the signal. Sometimes it made a difference between not being able to use the card and being able to get on the network.

The reflector was made by bending a doubled over sheet of heavy duty aluminum foil into the shape of 1/2 a cylinder. Imagine taking a cylinder and splitting it lengthwise into two halves.

This probably wouldn't be reliable enough for you to use, but it's an interesting idea. Most people couldn't believe that it actually made a difference, but it did. It would probably have worked even better if I had a reflector at both antennas.

Sorry I don't have any other (real) solutions, but this was my only involvement with digital broadcasting.

Tony

Dean Sensui · December 12th, 2006, 07:02 PM

James: Is this just to monitor video or is it to feed an editing or broadcast system?

James Clarke · December 12th, 2006, 07:21 PM

I shoot sports on a regular basis we use five cameras connected to a broadcast bus via triax, im the fith camera that is roving free, how ever my movements in and around the field are limited by the cable, im looking to purchase a system that will enable me to send video back to the bus via a microwave link of some sort, I vave tried several wireless transmitters but i get a lot of signal loss when i go over 1000ft

Dean Sensui · December 12th, 2006, 07:50 PM

Have you taken a look at these:

http://rf-links.com/24_transmitters.htm

Try inquiring at the website. Maybe they might have a solution available.

Douglas Call · December 13th, 2006, 06:58 AM

Here is a unit that will cover 1000feet range.

http://www.premierwirelessinc.com/PD...Mnl302_402.pdf

Microwave System
Frequency Of Operation . . . 5725 to 5875 MHz
Channels (User Selectable) . 10 (14.75 MHz channel bandwidth)
Channel Frequencies.
5733.75 MHz 5807.50 MHz
5748.50 MHz 5822.25 MHz
5763.25 MHz 5837.00 MHz
5778.00 MHz 5851.75 MHz
5792.75 MHz 5866.50 MHz
Modulation . FM
Range . 1,000 Ft. Clear Line of Sight (Using Patch Antennas)
(Consult factory for extended operating range)

December 11th, 2006, 07:15 PM	#1
James Clarke Regular Crew Join Date: Apr 2003 Location: BARBADOS Posts: 125 Images: 4	Wireless Video Hi I have been experimenting with wireless video for some time now but i stil get signal loss over a long distance say a football field, buying high end transmitters is out of the question because of the price, does anyone have any low cost solutions that are reliable

December 12th, 2006, 02:53 PM	#5
Tony Claxton New Boot Join Date: Oct 2006 Location: Big Spring, TX Posts: 5	Probably not reliable enough This reminds me of something I was doing several years ago. I work at a college where we were experimenting with wireless networking. We set up a wireless transceiver on a tower close to our building and I took a wireless network card and antenna home and installed them in my computer and placed the antenna in a window facing the tower. The reception was marginal (a distance of maybe 1/4 mile). I got some heavy aluminum foil and made a reflector to place behind my antenna to focus the signal. I don't have any hard data but using the monitoring software I believe I got as much as 3db and sometimes more of a boost in the signal. Sometimes it made a difference between not being able to use the card and being able to get on the network. The reflector was made by bending a doubled over sheet of heavy duty aluminum foil into the shape of 1/2 a cylinder. Imagine taking a cylinder and splitting it lengthwise into two halves. This probably wouldn't be reliable enough for you to use, but it's an interesting idea. Most people couldn't believe that it actually made a difference, but it did. It would probably have worked even better if I had a reflector at both antennas. Sorry I don't have any other (real) solutions, but this was my only involvement with digital broadcasting. Tony

December 12th, 2006, 07:02 PM	#6
Dean Sensui Inner Circle Join Date: Oct 2001 Location: Honolulu, HI Posts: 2,054	James: Is this just to monitor video or is it to feed an editing or broadcast system? __________________ Dean Sensui Exec Producer, Hawaii Goes Fishing

December 12th, 2006, 07:21 PM	#7
James Clarke Regular Crew Join Date: Apr 2003 Location: BARBADOS Posts: 125 Images: 4	in a nut shell I shoot sports on a regular basis we use five cameras connected to a broadcast bus via triax, im the fith camera that is roving free, how ever my movements in and around the field are limited by the cable, im looking to purchase a system that will enable me to send video back to the bus via a microwave link of some sort, I vave tried several wireless transmitters but i get a lot of signal loss when i go over 1000ft

December 12th, 2006, 07:50 PM	#8
Dean Sensui Inner Circle Join Date: Oct 2001 Location: Honolulu, HI Posts: 2,054	Have you taken a look at these: http://rf-links.com/24_transmitters.htm Try inquiring at the website. Maybe they might have a solution available. __________________ Dean Sensui Exec Producer, Hawaii Goes Fishing

December 11th, 2006, 07:36 PM	#2
Sean Maroney New Boot Join Date: Nov 2006 Location: Chicago IL Posts: 20	two tin cans and some fishing line??

December 12th, 2006, 07:57 AM	#3
James Clarke Regular Crew Join Date: Apr 2003 Location: BARBADOS Posts: 125 Images: 4	very funny sean im serious i need help

December 12th, 2006, 09:53 AM	#4
John Miller Major Player Join Date: Oct 2005 Location: Hillsborough, NC, USA Posts: 968	What format video? With a format such as DV or MPEG2-TS, you could set up a wireless computer network and stream the video via the network. Standard definition DV requires about 25Mbps. Using a 54Mbps wireless network could probably just about cope. You would have feed the DV source via Firewire to a computer. It would stream the DV via the wireless network to another computer which, in turn would send the DV back out to a suitable device via Firewire.

December 13th, 2006, 06:58 AM	#9
Douglas Call Major Player Join Date: Dec 2003 Location: Hollywood, FL Posts: 302	Premier Wireless Inc. Here is a unit that will cover 1000feet range. http://www.premierwirelessinc.com/PD...Mnl302_402.pdf Microwave System Frequency Of Operation . . . 5725 to 5875 MHz Channels (User Selectable) . 10 (14.75 MHz channel bandwidth) Channel Frequencies. 5733.75 MHz 5807.50 MHz 5748.50 MHz 5822.25 MHz 5763.25 MHz 5837.00 MHz 5778.00 MHz 5851.75 MHz 5792.75 MHz 5866.50 MHz Modulation . FM Range . 1,000 Ft. Clear Line of Sight (Using Patch Antennas) (Consult factory for extended operating range)