Tektronix 071-0590-00 user manual Es = Tse Us

Reference

Errored Seconds (ES): The number of seconds in the measurement interval containing one or more errors. The GB1400 measures asynchronous errored seconds—that is one second intervals based on the instrument's internal clock rather than the detection of an error. Errored seconds are not counted during unavailable time (see below). However, the errored second count does include both severely errored seconds and non-severely errored seconds.

ES = TSE - US

TSE = total seconds in the current measurement interval with one or more errors.

US = unavailable seconds in the current interval

%Errored Seconds (%ES): Errored seconds as a percentage of the total number of seconds in the measurement interval:

%ES = ( ES / TS ) * 100%

ES = errored seconds in the measurement interval

TS = total seconds in the measurement interval

Error Free Seconds (EFS): The number of seconds that contain no errors and are not unavailable.

EFS = (TS - ES - US)

TS = total seconds in the measurement interval

ES = errored seconds in the measurement interval

US = unavailable seconds in the measurement interval

%EFS: Percentage Error-free Seconds. Error-free seconds as a percentage of the total number of seconds in the measurement interval.

% EFS = ( EFS / TS) * 100%

EFS = error-free seconds in the measurement interval

TS = total seconds in the measurement interval

Severely Errored Seconds (SES): The number of errored seconds in the measurement interval which BER is greater than or equal to 1E-03, excluding unavailable seconds. For example, on a 100 Mb/s test signal, this would include all available, synchronous errored seconds with 100,000 or more errors.

SES = (seconds with BER ≥ 1E-03) - US

US = unavailable seconds in the current interval

GB1400 User Manual 3-43