Specifications

4-10
Operating Features and Specifications
Auxiliary Input
Pattern Mode
In pattern mode the trigger is synchronized to repetitions of the output pattern.
PRBS 2^31−1, 2^23−1, 2^15−1, 2^10−1, 2^7−1
Pulse synchronized with a specified bit in the pattern. The repetition rate is 1 pulse for
every 32 pattern repetitions.
Alternate pattern
Pulse at bit 0 of the pattern or trigger output alternates with pattern.
All other patterns
Pulse synchronized to any bit of the pattern. The repetition rate is a function of the pattern
length. The rate is the lowest common multiple of 256 and the length example:
• Pattern length = 32767 => 1 pulse/256 pattern repetitions
• Pattern length = 32768 => 1 pulse/pattern repetition
Divided Clock Mode
In divided clock mode the trigger is a square wave at the clock rate divided by 32 or 8.
NOTE Clock divided by 8 trigger has lower jitter. Clock divided by 32 has
same timing relative to data as the pattern trigger.
Interface
Pulse width: 32 bits
Pulse amplitude: Output terminated 50Ω to 0V; High: 0V nominal; Low: −0.4 V
nominal
Impedance: 50Ω nominal
Interface: dc coupled
Connector: SMA female connector
Auxiliary Input
The AUXILIARY INPUT port can be used to control user programmable alternate test
patterns or inhibit data output (force the data to a fixed low level).