Agilent Technologies N5980A manual BER Bar, Error, Sync Loss

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Reference for the User Interface

BER Bar

The BER bar displays the BER calculated during a period of 200 ms.

Error

This indicator turns red when errors are detected.

Stable errors are caused by the error add function: it turns SFP/SMA Error Insertion Rate off.

Variable and high errors may be caused by faulty connectors/cables. BERT connected to your device shows:

Stable or variable errors caused by your device. Correct the problems with your device.

If the problems are not clear, then accumulate measurement data and analyze the results.

Sync Loss

This indicator turns red when the measured BER is higher than the sync threshold of 0.1.

The ED pattern does not match the incoming data pattern.

Patterns have lost sync.

The device connected to the BERT has inverted the data pattern.

The device has changed the data pattern.

	Error Detector can sync only PRBS patterns. Clock patterns cannot be measured
NOTE
	by the error detector, and will result in loss of synchronization.

N5980A User Guide

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Contents Agilent 125 Gb/s Serial Bert Herrenberger Str Revision 1.0 MaySafety Summary Environmental Information Contents Programming Reference Introduction Inspect Shipment CD content isSerial Bert Front Panel Connect the InstrumentTo Connect N5980A Rear PanelSerial Bert setup diagram Install User Software for N5980ATo Install the User Software for N5980A Select the folder in which N5980A will be saved To Access N5980A Demo Offline Introduction Advanced ModeRunning the BER Test Setup Setting the Instrument ParametersAdvanced BER displays Gating BER and the Elapsed Gating Time Viewing the ResultsStore Setting Advanced ModeFile Menu Connection Menu Each PC can control only one N5980A ConnectHelp Menu Error IndicatorsInfo BER Bar ErrorSync Loss General Setup and Advanced TabGenerator Input Error DetectorSFP Data Pattern SMA Data PatternGating BER Bar BER and Advanced BER TabActual Errors Gating ErrorsError Detector Pattern Advanced BERAgilent N5980A Command Summary Common Command SummaryCommon Commands Scpi Instrument Command List- ReferenceID Query Load factory default setting Read error queueOperation complete Option QueryRecall setting Store current settingAll Channels DataratePattern SMA Output Electrical GeneratorSOUR1PATT Either sets or gets the pattern of the SMA outputAdd Single Error Error InsertionInsertion Rate Output LevelSOUR2PATT SFP Output Optical GeneratorEither sets or gets the pattern of the SFP output SOUR2PATTEADD Once SOUR2PATTEADDRATESyntax SOUR2PATTEADD Once Detected Pattern Trigger OutputSOUR3PATT SENS1PATT?Actual Bit Error Rate Synchronization modeActual Number of Errors Gating Number of Errors Gating Bit Error RateGating Time Start GatingGating Progress Description Selects the input for the error detectorInput Selection SENS1INPSample Code Communicate with the instrument Programming Reference