Bit Error Measurement Rate
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Bit Error Rate Definition
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Bit Error Rate Test
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Custom Testing Pricing SUPPORT Customer Service FAQ Documentation Publications Videos Calculators Training Customer Service FAQ Documentation Publications Videos Calculators Training BER Confidence-level Calculator × Errors Found Close In the lab, we don't need to know the true BER of our system. We simply need
Acceptable Bit Error Rate
to measure enough data to have some confidence that the BER is lower than some specified bit error rate pdf level. The question then becomes, if we repeatedly transmit N bits, and detect E errors, what percentage of the tests will the measured BER
Bit Error Rate Tester
(that is, E/N) be less than some specified BER (such as, BERS)? We call this percentage the BER confidence level (CL × 100%), and calculate it using the Poisson distribution as follows. In other words, CL × 100 is http://www.keysight.com/main/editorial.jspx%3Fckey%3D1481106%26id%3D...&sa=U&ei=p-e8VMmWI8n0UsW6gKAE&ved=0CCAQ9QEwBQ&usg=AFQjCNEO_PZyV0U7VnM9OIg1LF8lmICquw the percent confidence that the system's true BER (i.e. if N = infinity) is less than the specified BER (e.g. BERS). That is, if the measurement is repeated an infinite number of times, the measured BER will be less (that is, better) than the specified BER for CL × 100% of the tests. Since we cannot measure for an infinite length of time, the BER confidence level is always less than 100% (at least theoretically). Before starting a BER measurement, https://www.jitterlabs.com/support/calculators/ber-confidence-level-calculator one must identify a target confidence level. Some industry standards specify this level (many do not), and 95% is a reasonable target. All industry standards specify a maximum system BER (what we call BERS here). Use the calculator below to determine the confidence level for a BER lab measurement by entering the specified BER, the data rate, the measurement time, and the number of detected errors. For reference, the number of transmitted bits (N) is shown as the data rate (BPS) multiplied by the measurement time (T). Alternatively, one can determine how many bits must be measured in the lab (that is, how much time is required to measure data) to achieve a specific confidence level, assuming a certain number of errors (usually, 0 errors) — simply enter BERS, BPS, and E, then change T until the desired confidence level is found. Enter numbers below as integers, or use scientific notation (for example, enter 123 as 123, 1.23e2, or 1.23E2). BER Confidence-level Calculator specified BER (BERS) Data rate in bits per second (BPS) Measurement time (T) in units of Minutes Hours Seconds Number of measured bit errors (E) Number of transmitted bits (N = BPS×T ) BER confidence level (CL×100%) For example, how many bits must transmit error free to give a 95% confidence level that the true BER is less than 10-12? In the calculator, enter BERS = 1e-12
Networking Telecom bit error rate (BER) Definition bit error rate (BER) Facebook Like Tweet Google +1 LinkedIn Email http://whatis.techtarget.com/definition/bit-error-rate-BER Comment RSS Print A AA AAA Part of the Telecom glossary: In telecommunication http://www.tek.com/bit-error-rate-tester transmission, the bit error rate (BER) is the percentage of bits that have errors relative to the total number of bits received in a transmission, usually expressed as ten to a negative power. For example, a transmission might have a BER of 10 to the minus 6, meaning that, out of 1,000,000 bits bit error transmitted, one bit was in error. The BER is an indication of how often a packet or other data unit has to be retransmitted because of an error. Too high a BER may indicate that a slower data rate would actually improve overall transmission time for a given amount of transmitted data since the BER might be reduced, lowering the number of packets that had to be bit error rate resent. A BERT (bit error rate test or tester) is a procedure or device that measures the BER for a given transmission. This was last updated in September 2005 Contributor(s): Yaochou Yang Posted by: Margaret Rouse Related Terms Definitions Telecommunications - Telecommunications is the transmission of data, voice and video over significant distances by electronic means that use a wide variety of networks and media. (SearchTelecom.com) VoIP (voice over IP) - VoIP enables voice and multimedia communications, such as phone calls, over the internet and other IP-based networks, and allows enterprises to operate a single voice and data network. (SearchUnifiedCommunications.com) frequency-hopping spread spectrum - Frequency hopping is one of two basic modulation techniques used in spread spectrum signal transmission. (SearchNetworking.com) Glossaries Telecom - Terms related to telecom, including definitions about telecommunication service providers and words and phrases about voice, video and Internet communication. Internet applications - This WhatIs.com glossary contains terms related to Internet applications, including definitions about Software as a Service (SaaS) delivery models and words and phrases about web sites, e-commerce ... Dig Deeper People Who Read This Also Read... Bandwidth 101 Bandwidth 101 Understanding WLAN signal strength Comparing 2-D and 3-D NAND performance and longevity Reliability,
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