Agilent Technologies E5022A Operation Manual page 267

Measurement Definition
Measurement Parameter Definition
On-Track BER Measurement
BER Measurement A unique characteristic of the Agilent E5039A/B/C BER Test Module is that it detects the
Feature in E5022A
number of errors in terms of bytes, such that the user must specify the number of error bits
to be counted per byte in order to compute the system's bit error rate (BER) performance.
This characteristic is shown by the parameter '# of Error Symbols' from the [BER
Measurement] menu of the VEE Program.
BER is measured from the following equation.
Equation 5-24 Equation for solving BER
BER = -------------------------------------------------------------------------------------------------------------------------------------------------- -
(
TotalSector
•
•
•
•
•
•
Figure 5-19 Number of Error Symbols
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ErrorBitsPerByte × ErrorSymbol
Ð LostSector
Error-Bits/Byte, this parameter must be specified in the 'BER Configuration' menu.
This parameter specifies the number of error bits to be counted per byte.
Total Sector, counts to the total number of sectors including lost sector in a track.
Lost Sector, counts the number of sectors where the synchronous pattern is not
detected.
Error Symbol, counts the number of detected error bytes per sector.(Figure 5-19)
DataBytePer Sector, specifies the amount of data in bytes to be recorded per sector.
This parameter is specified in the [Data] parameter from the Data Format frame of the
'BER Configuration' menu.
8, is a constant factor of eight bits per byte.
) × DataBytePerSector × 8
Chapter 5