User guide

0V (Disable)
C A U T I O N
Before clicking this button, ensure that your device's inputs tolerate ground
potential.
Use this button to clamp the pattern generator's output ports (Data, Clock, Aux
Data and Tigger/Ref Clock) to ground. You can see the status of the outputs in the
display area of the pattern generator.
Note that you can also use the buttons present below the display, to enable or
disable the output ports.
This function can be useful in case you want to connect or disconnect a device to
any of the output ports to prevent any damage.
Output Blanking
When the generator is set up to generate a pattern, use this checkbox to activate
the Aux In port of the pattern generator. You can then connect a signal to this port
and operate the pattern generator in output blanking mode.
If a logic low signal is supplied to the Aux In port, pattern A is sent to the output
port. If a logic high is supplied, no data is sent to the output port.
This function is the same as the output blanking function in the Alternate Pattern
Control dialog box (see “Aux In” on page 165 for details). However, this function
also works with standard patterns.
When the generator is set up to generate a sequence, this checkbox is disabled.
You can connect a signal to the Aux In port of the pattern generator. The reaction
on this signal (for example, start sequence execution, or break loop) is defined in
the SequenceExpression. For details see “User-Defined Sequences - Concepts ”
on page 96.
Electrical Idle
Use this checkbox to activate Electrical Idle (Out Of Band Signaling; OOB). Electrical
Idle is controlled via the existing Error Add Input, which will loose its error insertion
functionality when used for Electrical Idle.
N O T E
The "Electrical Idle" checkbox is invisible when the N4876A Multiplexer is
connected to the N4903B Serial BERT.
4 Setting up the Pattern Generator
138 Agilent J-BERT N4903B High-Performance Serial BERT
In Pattern Mode
In Sequence Mode