Need Info adout 400 MHz radio

[releika]

Hi all!

Does anyone have the info about perfomance of 400 MHz ptp radio produced by 4 RF Communication? it needed immediately, but I didn't find any info about this solution at offical site.


May be anyone known another producers of 400 MHz radio?

thanks in advance

[Paul_B]

Aprisa XE & Aprisa SE

[releika]

Paul_B, many thanks!

[Stantheman]

docs in different langages here Library – 4RF (http://www.4rf.com/library/)

From what I have heard the equipment works well. If you want detailed information just contact 4RF.

If it didn't work they would not have been in business for so long now. Also link performance is dependent on the link physical characteristics, your design capability and what you implement.

What specific information do you want? What sort of link are you setting up?

MiMOMax Home (http://mimomax.com/) is a good narrow band linking product for 400 MHz. High throughput given the narrow band RF channel and low latency.

Without any info on what you are trying to achieve it is hard for people on the forum to advise you.

[releika]

Stantheman! thank you for your link! didn't find it myself.

i need the equipment to create the network for connection the oil platform with earth. on 434-450 MHz frequances band. it has to provide 2E1(+Ehernet). distance - 80 km (non-line-of-sight).
i think that 4RF's equipment will be great solution for solving my problem, but i have a very limmited budget. so I'd be very grateful if someone advise me any another solutions.

[Stantheman]

read these two case studies from 4RF http://www.4rf.com/library-shelf/tcs/4rf-tcs-long-paths.pdf http://www.4rf.com/library-shelf/tcs/4rf-tcs-offshore-link.pdf

the lack of line of site may be an issue, 4RF have done a 128 km link over water providing 11 x E1 and five 9's availability .. but with sufficient line of site. You may need to look at getting a sufficiently high site on land for a repeater and then linking down to your required land site. See my PM, let me know the site coordinates and I'll have a look at the profile/sites. Also talk to 4RF, they will work this through for you. The following is from one of their docs referenced above:-

4RF Communications has deployed a 128 kilometre link, over water, for Smart Communications in the Batanes island group in the Philippines, using a space diversity configuration. This example represents a particularly challenging links, but it is worth noting that space diversity is not necessarily required in many links. 4RF Communications has deployed a huge number of long distance links around the world, many in excess of 100 kilometres, using standard, non-space diversity configurations. While the inclination of this link is not perfect, it provides sufficient line-of-sight and Fresnel clearance. Antenna heights were chosen to maximise inclination and protect from multipath interference. The link is currently providing capacity of 11 x E1 at 99.999% availability, and is software upgradeable to 22 x E1 with a reduction in availability.