Good RF Parameters for Docsis 3.0? - Page 1
Forum section: electronics / general

author: Asavage9794
author_rank: Contributor
timestamp: April 09, 2016, 02:59:27 am
content: Ive been noticing some internet speed issues. Im supposed to get 100Mbps down and 10Mbps up. I did a speedtest on 5ghz wifi from my laptop and i only get like 30mbps down and 10mbps up. i think there may be an issue with the connection from my house to the isp but i dont really know how to read the RF Parameters. Its a Docsis 3.0 modem, and I use NewWaveComm. I also live about 16km from my isp.

author: Rerouter
author_rank: Super Contributor
timestamp: April 09, 2016, 03:07:46 am
content: plug in your laptop to an Ethernet connection, the fact your topping out at about 30mbps would indicate that its wifi range

author: GEuser
author_rank: Frequent Contributor
timestamp: April 09, 2016, 03:12:41 am
content: Above^Looking at the numbershttp://wa8lmf.net/miscinfo/dBm-to-Microvolts.pdfhttp://searchnetworking.techtarget.com/definition/signal-to-noise-ratio

author: Asavage9794
author_rank: Contributor
timestamp: April 09, 2016, 03:30:58 am
content: Im only like 3.5 meters away from the router though. I dont have a ethernet cable avalable.

author: rrinker
author_rank: Super Contributor
timestamp: April 09, 2016, 04:03:39 am
content: From a gig Ethernet connection I get past 150Gb down, 12Gb up. Which is more than the rated 150/10. From my AC equipped iPad, I get 72/12. My iPhone is 2.4GHz N, that one only gets like 30/12.The other trick is what server you test against. When I first got upgraded to the 150/10 service, most speed tests I was only getting about 100/12 even with the wired connection. But testing against one of my ISP's servers and it gets well over 150 down.

author: Rerouter
author_rank: Super Contributor
timestamp: April 09, 2016, 04:05:57 am
content: for reference, here is mineI'm on 100/1.5, and i'm testing at 112/2 on GigEOn optus cable at 7.2KM from exchange

author: Kilrah
author_rank: Unknown
timestamp: April 09, 2016, 05:33:37 am
content: Quote from: Asavage9794 on April 09, 2016, 03:30:58 amGet one. You can NEVER reliably speed test an internet connection on Wi-Fi since the environment has a huge influence on its performance. Also, 100MBps barely ever makes its way through WiFi in any practical case regardless of the ridiculous "maximal theoretical" specs the equipment manufacturer quotes.

author: daveshah
author_rank: Unknown
timestamp: April 09, 2016, 08:14:48 pm
content: Quote from: rrinker on April 09, 2016, 04:03:39 amNot bad!

author: Halcyon
author_rank: Unknown
timestamp: April 10, 2016, 06:44:57 pm
content: Don't forget 802.11 Wi-Fi is half-duplex. Then you've got protocol overheads to contend with before you even take into account interference, device density, environmental factors etc...A good rule of thumb I use is to half the link speed and you'll get roughly that in actual throughput. You mentioned you're on 5GHz, so on 802.11a you're looking at around 30Mbps throughput and on 802.11n unless you're using 40MHz wide channels with a shorter guard interval, it's likely you're still looking at <100Mbps.As others have recommended you'll need to connect using an Ethernet cable before you start doing any proper diagnostics.