Agilent Technologies J-BERT N4903B, User Manual, Page: 203 / 572

Trigger and Aux Output
Trigger and Aux Output - Concepts
The error detector has a Trigger Out and an Aux Out port that you can use to send
signals to other external devices such as an oscilloscope.
The Trigger Out can be set up to send a trigger to an external device either according
to the clock, or according to the data pattern being generated.
The Aux Out can be set up to either send the error detector's clock signal directly
from Clk In port, or the error detector's clock signal recovered from Data In port,
or the input data passed over a comparator.
Trigger and Aux Output - Procedures
To set up the trigger and auxiliary outputs:
1
Press
Trigger and Aux Out
in the
ED Setup
menu.
2
For the
Trigger
, select one of the threeoptions:
– Clock Divided by n
Sends a trigger signal every
4
,
8
,
16
,
20
,
32
,
64
, or
128
bits.
–
Pattern
A trigger is sent, every time the complete pattern was received.
–
Filler Word / SKPOS
A trigger is sent on reception of programmed Filler Word or SKPOS
depending on "8B/10B Symbol Comparison", "Bit Comparison without
PCIe3 SKPOS" or "Bit Comparison without USB3.1 SKPOS"mode
respectively. Next trigger is sent only when first trigger is processed.
3
For the
Aux Out
, select whether the
Clock
signal or the
Data
signal is supplied.
If
Clock
is selected, the clock signal used by the error detector is output directly
at Aux Out.
If
Data
is selected, the input data is output over a comparator at Aux Out.
The comparator is controlled by the 0/1 threshold. This lets you use an
oscilloscope to determine if the 0/1 threshold is correctly set. If the 0/1
Setting up the Error Detector
5
Agilent J-BERT N4903B High-Performance Serial BERT 203