EXFO PSO-100 Series Optical Sampling Oscilloscopes - Manual (Page 41)

Setting up and Using the Optical Sampling Oscilloscope
Optical Sampling Oscilloscope 33
Managing SoftSync Input
Managing SoftSync Input
The SoftSync inputs section the bottom left is used for input of parameters
important for the software synchronization algorithm to correctly
synchronize the data.
In order to obtain the correct time scale, an estimate of the signal
frequency should be inserted since there is no other way for the software
to know the bit rate. The signal frequency should be accurate within the
correct 8 MHz (sampling frequency divided by two) interval, according to
the figure below.
Ensuring that the correct values are entered ensures appropriate
measurements.
Signal
frequency
Number of eye periods to display
on-screen (available in eye diagram mode)
Data symbol rate (for example,
1/4 for a signal frequency of
40 GHz and a clock frequency of
10 GHz).
Pattern length of the input signal
(available in pattern mode)
... ...
Signal frequency
8 MHz
Even Intervals
Odd intervals
Correct interval