User guide

Preset List
The Preset list contains clock rate values that are commonly used by the error
detector.
These presets also modify the loop parameters of the tunable CDR according to
the selected standard. The factory presets consider the parameters as given in the
selected standard.
Click a preset to select it for the error detector clock rate.
Double-click a preset to modify it.
Update with measured data rate
Use the Update with measured data rate button to copy the measured data rate
into the Clock Rate field.
Add Preset
Use the Add Preset button to add a new preset to the Preset list. You can then
enter a value, a unit, and a short description for this new preset.
N O T E
Changes made in this dialog are effective immediately. So, if you press Cancel, the
settings are still valid.
Edit Preset
Use the Edit Preset button to modify the currently selected preset from the list.
You can only edit the presets that are user defined.
Delete Preset
Use the Delete Preset button to delete the currently selected preset from the list.
You can only delete presets that are user defined.
Transition Density
The transition density is defined by the number of transitions in the incoming data
divided by the total number of bits transmitted. In this field enter the transition
density in (%). Click 'measure' to measure and update the transition density.
This parameter affects the loop bandwidth, and thus must be either entered
correctly or measured. Some standards specify the loop bandwidth for a given
5 Setting up the Error Detector
180 Agilent J-BERT N4903B High-Performance Serial BERT