Specifications
7-17
Softkey Menu Descriptions
Trigger & Setup Menu
causes a trigger pulse to be output; and CLOCK mode, in which
the Trigger Output is the input clock divided by 8 or 32.
Select a clock/8 or clock/32 pattern generator trigger.
This key is enabled when the Pattern selected is a pure PRBS of
2^31−1, 2^23−l, 2^15−1, 2^10−1, or 2^7−1. Enables entry of a
bit pattern of length 7, 10, 15, 23 or 31 bits for triggering
depending on the current setting of the pure PRBS.Anall-ones
pattern is disallowed.
This key is enabled when the Pattern selected is an User Pattern,
ZerosuborMarkdenpattern.
It enables the position of the trigger bit to be varied. This is an
active parameter. If a user-defined pattern is selected, this key
controls the trigger bit position of the pattern currently in the edit
buffer. It does not affect the trigger bit position of the stored
patterns. If the current pattern is saved, the trigger bit is saved
with the pattern contents.
This key is enabled whenever an alternate user-defined pattern is
selected. Either the or the is underlined. If the
is selected, then the trigger pulse occurs synchronously as
alternate pattern halves are selected. If is selected, then the
trigger pulse is synchronized to the first bit of the pattern.
Error Detector Trigger Output
Pattern and clock triggers are provided. The clock trigger is a square wave at the clock rate
divided by 32. The pattern trigger for a pure PRBS is 1 pulse/32 pattern repetitions. For all
other patterns the trigger pulse occurs at the lowest common multiple of 256 and the
pattern length.
Use this key to select the error detector pattern trigger output
mode. Toggles between PATTERN mode in which the trigger
pulse is synchronized to repetitions of the output pattern, and
clock MODE in which the trigger pulse is a square wave at the
clock rate divided by 32.
Error Detector Errors Output
Permits the length of the pulse at the error detector ERRORS
OUTPUT port to be switched between RZ or stretched 200 ns.
PG TRIG /8 /32
PG TRIG PATTERN
PG TRIG BIT
PG TRIG A-B PAT
A-B PAT A-B
PAT
ED TRIG PAT CLK
ERR O/P RZ200ns