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Previous Questions

1 Paul M on 22 Jan 2012 asked  :
"Comments about my experiences rather that a question, but they may be helpful..... After reading that other people have had success over homeplugs, I bought a couple of PB900 units to distribute Sky+HD, and replaced my old 85mbps units with 500mbps Netgear homeplugs (which were advertised specifically for AV use), things seemed to work fine, so I bought more PB900 units – BUT BEWARE, your house needs to have perfect new electric cabling, which I fell foul of. When I first tested the system, it was in part of our house that was refurbished and re-cabled 20-years ago, and seemed to be OK, but soon proved to be unreliable. The “true” bandwidth over 500mbps homeplugs was around 200-300mbps, which should have been fine for the PB900 which needs about 85mbps, but the bandwidth was up and down, not constant, which the PB900 needs. I also tried to change the Sky output from 1080i to 576p, and the difference was virtually indistinguishable, in terms of picture and transmission quality. I tested various different types of homeplugs, and I actually got getter results from 200mbps Solwise units. They were slower (still enough for the PB900), but the bandwidth seemed to be more constant which gave better results, but not perfect as the picture still juddered a bit. Also, the IR extender facility was flaky, losing the connection every couple of days which needed the units to be reset - hassle when they are out of the way behind cabinets and under drawers! In older parts of our house, built 50-years ago and with God knows how many cabling changes (or not) over the years, bandwidth was flaky at best, and non-existent at worst. I had intended to use these to send Sky+HD around the house, but as the homeplug solution was unreliable, and I didn’t want to re-wire the house or sling network cables everywhere, I’m continuing to use the RF Sky output, as we installed RF distribution around our house 20-years ago, and fortunately our new Samsung TV’s all have analogue RF facilities and produce pretty decent pictures. I also tested the PB900 system with network extension cables, so if you have a wired network, I know that these units will work very well. But be wary of homeplug systems – fortunately Keene refunded me for the PB900 units I hadn’t used. "

Keene replied:

2 Tristan on 20 Jul 2011 asked  :
" Would I be able to use this as a multicast over WLAN if I set up multiple access points all on 802.11n (150 and/or 300Mb/s) E.G I have a 3 floor house I would like to multicast to, willing to put in multiple wifi units to ensure speed/coverage. Any protocol that would hinder this or would it just work on the preconfigured w/lan? (quality/speed would of course be down to me to optimise on the routers). "

Keene replied: Good Morning The PB900 sender will certainly multicast to multiple receivers. Whether it will work successfully over WLAN is a hard one to answer. The units need a minimum of 85Mbps continuous, if the data rate falls below this then the picture will stutter or freeze. Some customers have reported success over both WLAN and Homeplug, whereas others have reported quality issues so we cannot guarantee success The absolute best option is to hard-wire CAT5 if at all possible.

3 Nick on 22 Jun 2011 asked  :
" If the switch goes down will this system work unit to unit direct with crossover cables."

Keene replied: It will work unit to unit directly cabled with an ordinary (not crossover) cable

4 Jon a on 06 Oct 2010 asked  :
" Can I use these over my existing wired home nextwork, I have a 16 port unmanaged gigabit switch wich is currently use for miany internet connection in many rooms, would this system just use the esiting netork or would I need additional wiring"

Keene replied: The PB900 system will work fine on a gigabit network and you shouldn't need any additional wiring.

5 Simon on 27 Sep 2010 asked  :
" Can you confirm whether this model supports MultiCast."

Keene replied: It will operate as a true multicast - that is to say one transmitter can drive multiple receivers with no extra network load.

6 Elliot H on 25 Feb 2010 asked  :
"Could you tell me if this system is using compression?"

Keene replied: Yes it does use compression (using :"M-JPEG Intraframe compression scheme base on the discrete cosine transform (DCT)) but that the compression should be unnoticeable on screens up to 46", above that we'd recommend a direct cabled connection if at all possible.

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