Externally Paced
Scans
This mode is much like the Timer Paced Scans except the trigger source is
external to the HP E1313/E1413. The trigger could come from a software
command such as
TRIGger
, or a hardware trigger from either the External
Trigger input or one of the VXIbus TTLTRG lines.
Example Command Sequence
ROUT:SEQ:DEF LIST<
n
>,(@101,103,105,107)
<n> can be 1 - 4.
ROUT:SCAN LIST<
n
>
<n> can be 1 - 4.
SAMP:TIM LIST<
n
>,<
t
c
>
<t
c
> can be 10
µ
s to 32.768ms.
TRIG:SOUR <
source
>
<source> can be BUS, EXT,
HOLD, or TTLTrg0 - TTLTrg7.
TRIG:COUN <
count
>
<count> can be 1 - 32768 or INF.
INIT:IMM
Starting
Trigger event, either hardware or software
Acquisition starts
Stopping Before Trigger Count is Reached
Remove Trigger Source
Stops at end of scan list, still
initiated.
or
TRIG:SOUR HOLD
Stops at end of scan list, still
initiated.
TRIG:IMM
One more scan, now idle.
or
ABOR
Stops immediately (must use
ABOR if TRIG:COUNt is INF).
t
c
t
c
is the sample time between channels.
The large arrows are the Trigger events. The smaller arrows are sample triggers
generated by the HP E1313/E1413 when stepping through the channel list.
=Trigger Count
trigger
trigger
trigger
Channel Number
114 Understanding the HP E1313/E1413
Chapter 4
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