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Bit Error Rate Modem


Overview colophon contact FAQ Documents documentation troubleshooting blog Source Code liquid-dsp (github) software license © 2016 Joseph D. After a simple power cycle, BER would be at 0% and remain there.So I think you're on to something. · actions · 2009-Mar-29 10:40 pm ·

Forums → US ISPs For this example, you will need on your local machine: a text editor such as Vim a C compiler such as gcc . Welcome, Guest. More about the author

BTW, I've seen it go much higher, about 900%, if I recall. bit error rate Packet Error Ratio[edit] Isn't PER defined as the number of incorrectly received data packets divided by the total number of transmitted (not received) packets? --Richardtorres314 (talk) 03:55, 23 The discrete alphabet of symbols generally represents a sequence of bits. I'll PM later today with a couple more specific questions.

Acceptable Bit Error Rate

Let us know if you need further assistance. If you don't see any differences, then I would not be too worried. V-Cable changes [Ebox] by diskace472. By using this site, you agree to the Terms of Use and Privacy Policy.

This time the connection was made at 129 MHz, and SNR just above 30 dB with occasional dips to just under 30 dB. Problems tend to be greatest during evenings and weekends, where the 'good' connection will last for just a few minutes. This should provide about 10 errors, which is enough to make the calculation of BER have some significance. Bit Error Rate Calculator I'm wondering if it's the cable modem itself or the lines outside.

Honestly, about 80% of all field devices claiming BER testing would fall into the same trap. Privacy policy About Wikipedia Disclaimers Contact Wikipedia Developers Cookie statement Mobile view liquidsdr.org doc blog colophon search Linear Modem Bit Error Rates, Part I: Simulation By Joseph D. Your SNR is very good @ 37.1 dB which means that youy don't have tool much noise/interference. The receiver simply needs to make a decision about which symbol was transmitted to recover the information.

I will update again tomorrow once I see that it's consistent.Thanks for your prompt help! Bit Error Rate Tester Software I have not seen any connection or signal problems without the router. Your SNR is very good @ 37.1 dB which means that youy don't have tool much noise/interference. Given an information message \(k \in \{0,1,\ldots,M-1\}\) , the transmitted symbol at complex baseband is the complex value \(s_k\) in the set \(\mathcal{S}_M = \{s_0,s_1,\ldots,s_{M-1}\}\) .

Bit Error Rate Measurement

Then it usually sits at 0%. · actions · 2009-Mar-25 9:01 am · K PattersonPremium Memberjoin:2006-03-12Columbus, OHkudos:1

K Patterson Premium Member 2009-Mar-25 9:09 am I have a vague memory (most of This is generally due to noise and distortion, often realized through inter-symbol interference, an artifact of a imperfect filtering. Acceptable Bit Error Rate At 129 MHz, signal levels are right around 0.0 dBm and SNR is more like 34 dB. Bit Error Rate Pdf It worked fine for the 45 minutes or so I had it that way, connected at 111 MHz with consistent SNR at 35-37 dB and full download speeds.

Logged drt Newbie Posts: 17 Re: Degraded Internet Connections « Reply #5 on: May 19, 2012, 05:04:04 PM » We had the service visit on Thursday and they replaced some cables http://onlinetvsoftware.net/bit-error/bit-error-rate-packet-error-rate-conversion.php A valid bit error rate might be 1 bit/sec, but it has no meaning unless the bit rate is also given. I have not had a chance to test this more extensively without a splitter in the line and a direct Ethernet connection, so I fear a tech visit will just result i can't copy and paste because the page keeps refreshing by itself, but right now it says 561mhz, snr 38.7, signal strength 4.5dbmv, bit error rate 0.669%. Bit Error Rate Tester

Subsequent comments should be made in a new section on this talk page. You need a significant number of errors to have confidence in the BER. More work is required to fully incorporate it and it is messy. http://onlinetvsoftware.net/bit-error/bit-error-rate-data-rate.php Therefore, a quasi-error free level, such as 1E-9, or one error in a billion, is used.

Common linear digital modulation schemes with an average pulse amlitude \(A_p\) For simplicity let's confine the discussion to linear modulation schemes: those whose resulting transmitted signal is simply a linear combination Bit Error Rate Testing Until I power cycle.Anyone else see this pattern of behavior with their RCA modem? Logged MediacomBill Guest Re: Degraded Internet Connections « Reply #1 on: May 16, 2012, 11:45:58 AM » Hi Dan:I just ran some tests on your modem and do see quite a

Any comments on the meaning of BER or ideas for revising the article to appreciate two possible meanings? ~KvnG 17:01, 16 February 2015 (UTC) Retrieved from "https://en.wikipedia.org/w/index.php?title=Talk:Bit_error_rate&oldid=726592630" Navigation menu Personal tools

SchuminWeb (Talk) 05:05, 30 December 2009 (UTC) Bit error ratio → Bit error rate — Bit error rate is a 3.3 times as common than Bit error rate according to books.google.com, Mar 12, 2010 at 6:03 PM #2 OrbitzXT New Member Joined: Mar 22, 2007 Messages: 1,969 (0.57/day) Thanks Received: 59 Location: New York City System Specs System Name: AX-01 Processor: Intel Mounting Antenna [HomeImprovement] by DarkLogix273. Bit Error Rate Tester Agilent Tonight, however, things have been spotty.

These include the experience of building one of the first Regional automated customer service centers for a major telecom provider. At the very beginning (around 9:45pm), things looked great, but after about 30 minutes, I started to see download rates drop to the 250-500 kb/s, bit error rates climb, and frequent Note that because the simulation runs one million symbols for each SNR step, (that's two million bits for QPSK) the simulation might take a few seconds, depending upon the speed of http://onlinetvsoftware.net/bit-error/bit-rate-and-bit-error-rate.php Warning (5) DHCP RENEW WARNING - Field invalid in response The problems and messages appear to be somewhat similar to this report:http://mediacomcable.com/CustomerSupport/forum/index.php?topic=4975.0if that's of any value.I will probably run another