User`s guide

Making a KPWM Measurement
This tool defaults to a Fibre Channel setup. The description covers most basic measurements and
configuration.
• Connect a data signal to IN1 and a Pattern Marker to IN2.
• If the "Pattern" window on the Dialog bar does not show the pattern to be measured, use one of the
3 options below for choosing the pattern to be analyzed:
A dialog box will appear allowing you to choose a previously stored file.
OR
A dialog box opens allowing you to edit the current pattern or create a
new one in binary or hexadecimal. You will be prompted to save this file.
OR
This function assumes that you have a repeating pattern on the measurement
channel and a pattern marker on the arm channel. A dialog box opens prompting
you for the number of bits in the pattern and the bit rate. Enter these values and
press learn. You will be prompted to save this file. In some cases, there may be
difficulties learning the pattern at high data rates. If using a generator as the source,
you can lower the bit rate and learn the pattern at that lower rate. Then after saving
the pattern, make the measurement at the previous rate. Learning the pattern does
not need to be performed before every acquire, only if a pattern is changed or is not
available in the Load dialog box.
• Choose the –3dB corner frequency—default is 637kHz for 1x Fibre Channel.
• Click on Pulsefind
• Click on Single Acquire
In the case where there are over 20 ps of PJ, you should enable TailFit to determine an accurate RJ.
Note that this will significantly increase test time. In the case where there is no high frequency jitter
component, turning on "Quick Mode" may decrease the test time. This Mode will more sparsely sample
and thus may not show high frequency information.
© WAVECREST Corporation 2005 Section 4 - GigaView
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