Performing Ber Analysis - Viavi MSAM Manual

Chapter 2 Data Communications Testing

Performing BER analysis

a binary format. User programmable byte patterns can be up to 2048 bytes long and
are defined using a hexadecimal format.
To define a user programmable pattern
1 Select the Setup soft key, then select the Pattern setup tab.
2 In Pattern, select User Bit Pattern, or User Byte Pattern.
3 Using the keys provided, type the pattern:
–
format. The pattern can be up to 32 bits long.
–
using a hexadecimal format. The pattern can be up to 2048 bytes long.
4 Select OK to store the pattern and return to the Pattern tab.
5 Under Pattern Mode, select Continuous to send the pattern continuously after
you start the test, or Single to insert one repetition of the pattern, followed by a
series of ones.
If you selected Single, use the Bert Pattern Insert button on the Main screen to
insert the pattern.
The pattern is defined.

Performing BER analysis

Performing BER analysis of a circuit involves configuring the test, connecting to the
circuit, starting the test, inserting logic errors, and then viewing test results. The
scenario below provides the basic steps involved; you may need to configure additional
settings for your particular circuit.
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ALERT: FILE DELETION
When you reimage the instrument for security purposes, all user pro-
grammed patterns on the instrument will be deleted. If you plan on using
these patterns frequently, you should save them to a USB key. You can
then load them from the USB key when ever you want to use them.
User Bit Patterns. Use the 1 and 0 key to type the bits in the pattern using a binary
User Byte Patterns. Use the keyboard at the bottom of the dialog box to type the pattern
NOTE:
The MSAM reads User Byte Patterns left to right. The FIREBERD 6000
reads equivalent LUP patterns right to left. If you need assistance defining
patterns on the instrument that will be compatible with the
FIREBERD 6000, contact your Viavi technical assistance at 1-844-GO-
VIAVI. For the latest TAC information, go to
en/services-and-support/support/technical-assistance.
Data Communications and Diphase Testing Manual
21148872, Rev. 002
http://www.viavisolutions.com/
January 2016