Keysight M8000 Series of BER Test Solutions User Guide 257
Setting up Generator 5
Understanding Delay and Crossover
The M8020A/M8030A provides the possibility of modifying the output data
signal by varying the signal's delay to the clock signal, and the signal's
crossover.
Delay
The exact time delay through a test setup can vary. The delay function
allows you to compensate for this by adjusting the active edge of the
trigger output relative to the clock/data outputs. This varies the phase
relationship of the data and clock outputs (causes the data to have a
certain time delay after the clock pulse). The higher the delay, the greater
the time difference between the clock signal and the data signal. The delay
can be adjusted by the generator’s Data Out 1 and Data Out 2 ports.
Crossover
Crossover is the voltage level where the overlapped rising and falling
edges of the logic levels intersect. This adjustment varies the widths of the
logic highs and lows.
The following figure shows examples of crossover at 50 %, 80 %, and 20 %:
Note that the crossover feature is not supported by M8040A.
To Next Page
Loading...
Need help?
General
