Triggering
CSA7000B Series & TDS7000B Series Instruments User Manual
3-117
Comm Triggering
The instrument can trigger on communication signals (optional on TDS7000B
Series). For detailed information on using comm triggering to trigger on your
communications signals, see the CSA7000B & TDS7000B Series Options SM
Serial Mask Testing and Option ST Serial Triggering User Manual.
Serial Pattern Triggering
In applications that involve signals with serial data patterns, you may be able to
use serial pattern triggering (optional on TDS7000B Series) to capture more
complex events. Serial trigger provides a direct means to analyze pattern
dependent issues, even on a single-shot basis. Acquisition of low power signals
can be enhanced by combining serial trigger and signal averaging to reduce
random noise. You can specify patterns with up to 64 bits, including don’t-care
bits. The serial trigger system can be clocked from an external source or from
internal clock recovery. Serial pattern trigger operates on NRZ-encoded signals
atdataratesupto1.25Gb/s.
For detailed information on using serial pattern triggering to trigger on your
serial pattern data signals see the CSA7000B & TDS7000B Series Options SM
Serial Mask Testing and Option ST Serial Triggering User Manual.
NOTE. The instrument will attempt to acquire lock once. If the input data is
disrupted, removed, or heavily distorted, the instrument may not acquire lock or
may lose lock. If the r ecovered clock is not locked to the incoming data, the
waveform display will not be stable. Once the input data is available, press the
PUSH SET TO 50% knob to force the instrument to reacquire lock.
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