User guide

• Delay Control In
Allows you to connect a signal for generating jitter in the data outputs.
• Aux In
The signal at the Aux In port can be used to switch between patterns A and B
or to "blank" (suppress) the output signal. When a user-defined sequence is
executed, it can also be used to control the sequence execution.
Understanding the Pattern Generator's Output Ports
The pattern generator provides the following output ports:
• Data Out and
Data Out
The data outputs serve as device stimuli and can be set up so that they are
compatible with a variety of logic families. With respect to Data Out, Data
Out has inverted logic.
• Clock Out and Clock Out
The clock outputs serve as frequency (bit rate) references and can be set up
so that they are compatible with a variety of logic families. With respect to
Clock Out, Clock Out has inverted logic.
• Trigger/Ref Clock Out and Trigger/Ref Clock Out
This port allows you to connect a trigger for another device (for example, an
oscilloscope) and can be set up so that they are compatible with a variety of
logic families. With respect to Trigger/Ref Clock Out, Trigger/Ref Clock Out
has inverted logic.
• Aux Data Out and Aux Data Out
This port allows you to generate a pulse with a frequency that is a fraction of
the present clock and can be set up so that they are compatible with a variety
of logic families. With respect to Aux Data out, Aux Data Out has inverted logic.
Note that this output is not phase-synchronized with the clock.
• Aux Clk Out
This output port is intended as clock input for N4916B De-Emphasis signal
converter.
The complementary outputs can be used when:
• additional output capability is needed for an instrument such as an oscilloscope
or digital communication analyzer.
• your device requires differential inputs.
N O T E
The pattern generator's Data Out, Clock Out, Aux Data Out, Trigger/Ref Clock Out
and Aux Clk Out ports must be terminated with 50 Ω if they are not connected.
Setting up the Pattern Generator 4
Agilent J-BERT N4903B High-Performance Serial BERT 123