Manual Arming Versus Auto Arming; Delayed Triggering - HP 3563A Operating Manual

Input Setup
Setting Up Triggering

Manual Arming Versus Auto Arming

Auto arming automatically resets the trigger after each time record is acquired. Manual arming
collects one time record when ARM (in the Status group) is pressed and the trigger conditions are
satisfied. The instrument does not look for the trigger signal until ARM is pressed. The TRIG
ARMED indicator light (in the Status group) indicates the trigger has been armed. When one
record is acquired, the instrument then waits until ARM is pressed again. Free run triggering always
overrides manual arming.

Delayed Triggering

The HP 3563A can pre-trigger up to
samples after the trigger signal actually arrives. Pre-triggering is useful for impact analysis to
102,400
ensure that you have captured the entire impulse. Post-triggering is helpful when analyzing systems
with time delays because the measurement can wait until the desired signal arrives. Delayed
triggering is also used when recalling and measuring throughput files from disc (see chapter 9 for
more information on time throughput). Note that overload rejection does not reject records used in
counting post-trigger delay. Press TRIG DELAY to display the following softkeys:
CHAN 1
DELAY
CHAN 2
DELAY
The delay may be specified in microseconds, milliseconds, seconds, minutes, revolutions or records.
Enter negative numbers to specify pre-trigger delay. The resolution is
sample). To find the current time record length for setting delayed triggering, press STATE TRACE
until the state is displayed and look under FREQ: REC LGTH.
and the actual delay used can be echoed by pressing CHAN
Trigger delays are ignored when the trigger type is free run.
Note
If you change the sign of the trigger delay (with averaging off), disregard the first
triggered measurement taken.
7-42
samples
4095
Allows you to set the pre- or post-trigger delay for Channel l, using the
Entry group.
Allows you to set the pre- or post-trigger delay for Channel 2, using the
Entry group.
for zoom) before and post-trigger up to
(4094
1/2048
Delay is rounded to the nearest
DELAY after the measurement.
1 /2
of a record (one
At,