Triggering on Waveforms
TDS 500D, TDS 600B, & TDS 700D User Manual
3–113
Communications Triggering
The TDS Oscilloscope can trigger on communication signals (option 2C only).
Table 3–9 lists the available standards, codes, and bit rates. This section
describes how to use Comm triggering — how to select the Source, Code, bit
rate, telecom Standard, Pulse Form, Level or Threshold, and Mode and Holdoff.
NOTE. To function properly, Comm triggers force some oscilloscope modes and
settings to new values. Also, selecting a mask from the MEASURE menu selects
the Comm trigger settings for that mask. However, selecting a Comm trigger
does not select a mask.
Table 3–9: Comm triggers
Standard Name Code
1
Bit Rate
OC1/STM0 NRZ 51.84 Mb/s
OC3/STM1 NRZ 155.52 Mb/s
OC12/STM4 NRZ 622.08 Mb/s
DS0 Sgl Masks
2
64 kb/s
DS0 Dbl Masks
2
64 kb/s
DS0 Data Contra Masks
2
64 kb/s
DS0 Timing Masks
2
64 kb/s
E1 AMI 2.048 Mb/s
E2 AMI 8.44 Mb/s
E3 AMI 34.368 Mb/s
E4 CMI 139.26 Mb/s
E5 (CEPT) NRZ 565 Mb/s
STM1E CMI 155.52 Mb/s
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