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Triggering on Waveforms
3–104
TDS 500C, TDS 600B, & TDS 700C User Manual
Table 3–8: Comm triggers (cont.)
Standard Name Bit RateCode
1
STS-1 AMI 51.84 Mb/s
STS-3 CMI 155.52 Mb/s
FC133 NRZ 132.8 Mb/s
FC266 NRZ 265.6 Mb/s
FC531 NRZ 531.2 Mb/s
FC1063 NRZ 1.0625 Mb/s
D2 NRZ 143.18 Mb/s
D1 NRZ 270 Mb/s
FDDI NRZ 125 Mb/s
1
AMI = Alternate Mark Inversion. CMI = Code Mark Inversion. NRZ = Non-return to
Zero
2
These Telecom DS0 standards are automatically selected from the Mask Menu. The
trigger uses Pulse/Width trigger.
Use the Comm trigger menu to select communications triggering and to perform
the procedures for source, code, standard, pulse form, trigger level or threshold,
mode, and holdoff that follow.
To bring up the Comm Trigger menu, press TRIGGER MENU ➞
Type (main) ➞ Comm (pop-up). (See Figure 3–49.)
To select which source you want for the trigger:
Press TRIGGER MENU ➞ Type (main) ➞ Comm (pop-up) ➞
Source (main) ➞ Ch1, Ch2, Ch3, or Ch4 (side).
To select the code, press TRIGGER MENU ➞ Type (main) ➞ Comm
(pop-up) ➞ Code (main) ➞ AMI, CMI, or NRZ (pop-up).
You can set mode and holdoff for all standard trigger types and classes. To set
mode and holdoff, refer to Set Mode & Holdoff on page 3–75. To learn more
about trigger mode and holdoff, see Trigger Modes and Trigger Holdoff on
page 3–65.
To Select Comm
Triggering
To Select a Source
To Specify Code
To Set Mode & Holdoff