Using the error detector
The oscilloscope Error Detector conducts bit tests much like a BERT. This feature requires that options BITERR and ST14G
(14.1Gbps serial trigger) be installed. The Error Detector is often used in conjunction with TekExpress software applications to
conduct receiver and margin testing.
The Error Detector option for this instrument series is a generic NRZ serial data bit error detector. It is not inherently protocol
aware for any specific standards, but instead matches the incoming bits against a pattern file that is specified during setup. The
bit-by-bit comparison is done within the oscilloscope's trigger system rather than analyzing data in acquired waveforms. This
assures that no bits will be missed during the analysis, up to the data rate of 14.1 Gbps.
The Error Detector has built-in preset setups that cover the most common use cases for PRBS signals. Sample arbitrary
waveform generator (AWG) setup files are included for various PRBS signals. These files make it easy to verify correct operation
of the Error Detector, and may be used to test a device-under-test (DUT). However, any serial data generator can be used,
provided that a pattern file can be created that accurately represents exactly what will be transmitted by the source.
To use the Error Detector, perform the following steps:
1. Select Analyze > Error Detector to
display the Error Detector control window.
2. Select the Setup tab, select a preset from
the Preset Setting drop-down list, and
then press Apply. If you have selected
CUSTOM_SETUP, the Apply button is
not available (proceed to step 3).
If you have not selected
CUSTOM_SETUP, proceed to step 4.
Analyzing waveforms
148 DPO70000SX Series User
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