224 Keysight M8000 Series of BER Test Solutions User Guide
4 User Interface - M8020A Display Views
The data content of the extension pattern is selectable. Following are
the selectable block fill modes:
• Use Adjacent Symbol Value
Depending on payload alignment, this setting uses the first or the
last symbol value of the payload pattern for filling up the sequence
block.
Using this option will generally produces the shortest sequence
block duration with the smallest extension pattern.
• Repeat Pattern
This setting repeats the payload inside the extension block. Using
this setting, the entire sequence block containing an integral
number of payload repeats. This setting produces the same output,
independent of the selected payload alignment mode.
This option generally causes the extension pattern length to
increase as it needs to allow for accommodating multiples of the
payload pattern length.
• Fill Extension with Clock Signal
This option fills the extension pattern with a half rate clock.
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