User guide

• In hex or text format, each character represents four bits-only the characters
'0' to '9' and 'A' to 'F' are allowed (not case-sensitive).
• In binary format, each character represents eight bits-all ASCII characters are
allowed.
• In symbol format, each symbol represents 10 bits.
Example:
'X' in binary format or '88' in hex or text format produce the same bit sequence as
10001000 in dual format.
In hex or text format, the data must be separated by one white space. The white
space can be a tab, a space, or a new line.
In hex or text format: For pattern lengths that are not multiples of 8 bits , the data
has to be padded to provide the correct number of hex characters. The extra bits
are ignored.
In symbol format: Patterns lengths must be a multiple of 10 bits.
ASCII Pattern Files Examples
Version=EPA 2.0
Format=Hex
Description=This is a simple standard pattern
Count=1
Length=128
Data=
01 02 03 04 10 20 40 80
ff 00 ff 00 ff 00 ff 00
Version=EPA 2.0
Format=Text
Description=This is a simple alternating pattern
Count=2
Length=96
Data=
01 02 03 04 10 20 40 80 ff 00 ff 00
Data=
01 02 03 04 10 20 40 80 ff 00 ff 00
Pattern Resolutions and Lengths
The Serial BERT has 32Mbits (8 MB) RAM for storing patterns. As discussed in
“How the Serial BERT Generates Memory-Based Patterns” on page 69, all
patterns are loaded into the RAM until a 512-bit boundary is reached. If the pattern
Setting up Patterns 3
Agilent J-BERT N4903B High-Performance Serial BERT 67
Standard Pattern in Text
Alternating Pattern in Text