To use. Use these controls to define a NRZ pattern for the instrument to trigger on.
Pattern
1. In the Format drop-down list box, select Binary or Hex.
2. Click the Edit button and use the Serial Pattern Editor to define the pattern.
3. Click Enter.
Lock
Lock automatically finds and locks on to a long repeating pseudo-random bit sequence (PRBS). Pattern Lock enables the
instrument to take samples at specific locations in a data stream to define the trigger.
1. Click in the Bit Pattern Length entry box and use the multipurpose knobs to define the bit length of a pattern to search for.
2. Click in the Shift Amount entry box and use the multipurpose knobs to define the number of bits to shift from the zero bit
position of the initial lock.
3. Click the left or right arrows to increment from bit zero by the Shift Amount to redefine the pattern to be used as the trigger.
Set up FastFrame operation
Follow these steps to use FastFrame mode:
1. Set up the Trigger control window to trigger on the signal of interest.
2. Adjust the horizontal and vertical controls to display a waveform without any clipping.
3. Adjust the Resolution controls to set the number of samples you want to acquire with each acquisition.
4. From the Horiz/Acq menu select FastFrame Setup.
5. Configure the number of frames (Frame Count) you want to capture.
6. Touch the FastFrame button to turn on the FastFrame mode.
7. After the acquisition is complete, select the frame that you want to view under the Frame Viewing section.
Set to 50 with comm triggers
Push the front-panel Level knob.
Overview. The Set to 50% control sets the trigger threshold to 50% for some Comm triggers, and to a high of 75% with a low of
25% for others.
Behavior. When either AMI or MLT-3 code is selected with Comm triggers the Set 50% control measures peak-to-peak level and
sets an upper threshold value at 75% and a lower threshold value at 25%. Other codes work exactly the same as Edge, Width,
Glitch, and Timeout triggers; the threshold is set to 50%.
Clock source channel
Use the Clock Source drop-down list to select the input channel that is connected to the clock signal.
Set the clock threshold level
To set the clock threshold voltage level:
1. Click in the Clock Level or Threshold entry box.
2. Use the multipurpose knob to set the voltage level.
Oscilloscope reference
DPO70000SX, MSO/DPO70000DX, MSO/DPO70000C, DPO7000C, and MSO/DPO5000B Series 827
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