Keysight M8000 Series of BER Test Solutions User Guide 389
Setting up Patterns 7
User-Defined Sequences
This section describes the basics of user-defined sequences.
A sequence is created and maintained by means of the Sequence Editor. A
sequence consists of up to 500 blocks that can be looped. Each block can
generate a pause signal (constant 0 or 1), a divided clock signal, a 2^n -1
PRBS, or a user pattern.
Single or multiple blocks can be looped. The sum of the blocks and the
counted loops must not exceed 500. An overall loop restarts the sequence
after it has come to its end.
Sequence Block Display
A new sequence consists of one block that is infinitely repeated (looped).
By default, this block has a length of 512 bits and generates a Pause 0
signal (a continuous stream of zeros). All this is shown on the display.
Sequence Block Parameters
The Sequence Setting window allows you to change the contents and the
trigger generation of a sequence block.
Choices are:
• Block No. - Can be up to 500 blocks.
• Length - This is the length of the pattern in bits for a standard pattern
of 128 bits.
• Block Type - Clock, PRBS, Pulse, Static or Memory Patterns.
• PRBS - You can choose a PRBS of polynomial 2^n -1. The range of "n"
is 7, 10, 11, 15, 23, or 31. You can change the block length, if desired.
• Divided Clock: You can use this option to generate the signal at every
nth clock pulse.
• Memory Pattern: When you select pattern type as memory pattern, a
Select Pattern dialog will appear. You have to locate the pattern file
and then click OK. The patterns will be loaded in the sequence.
To Next Page
Loading...
Need help?
General
