User guide
Description=
optional
Start=
optional
Block #=
repeated for each block, numbered
Loop=
repeated for every loop, not numbered
Example of a SequenceExpression:
(Version= 1.0
Start= IMM
Block 1= PRBS11, 1024, TrigOn
Block 2= C:\<Instrument Model>\Pattern\Upat10.ptrn
Block 3= P0, 512, TrigOff
Loop= B1, B1, 2)
A sequence is in common for both channels, Data Out (Channel 1) and Aux Data
Out (Channel 2). However, the sequence for both channels will have a different
version and pattern in a block specification.
Example of a SequenceExpression for both channels:
(Version= 1.1
Start= IMM
Block 1= P0, P1, 311040, TrigOn
Block 2= c:\n4903b\pattern\sdh_stm-16_hp-bip_alt.ptrn,B,
c:\n4903b\pattern\sdh_stm-16_hp-bip_alt.ptrn,A,
TrigOff Loop= B1, B1, INF)
Default is IMM = immediately after downloading the sequence to the pattern
generator. Other options are:
• AuxInHi | AuxInLo: Sequence starts when Auxiliary Input is high or low.
• AuxInRising | AuxInFalling: Sequence starts with a rising or falling edge at the
Auxiliary Input.
• Manual: Sequence starts when the Start button is clicked.
Default is pattern P0 (Pause0), a length of 512 bits, and Trigger/Ref Clock On. Other
options are:
• Patterns: P1 (Pause1), undistorted PRBS, a user pattern from a file, or a fraction
of the clock pulse (divider range: 2 ... 127).
• Length: Must be 512 bits or a multiple thereof. Shorter or longer user patterns
are automatically repeated until the next 512-bit boundary is reached (see also
“How the Serial BERT Generates Memory-Based Patterns” on page 69).
Setting up Patterns 3
Agilent J-BERT N4903B High-Performance Serial BERT 97
Start Options
Block Options