Outputting Trigger Signals; Initiating/Running Algorithms; Starting Algorithms - HP E1419A User Manual

Outputting Trigger
Signals

INITiating/Running Algorithms

Starting Algorithms

Chapter 3
The HP E1419A can output trigger signals on any of the VXIbus TTLTRG
lines. Use the OUTPut:TTLTrg<n>[:STATe] ON | OFF command to select
one of the TTLTRG lines and then choose the source that will drive the
TTLTRG line with the command OUTPut:TTLTrg:SOURce command. For
details see OUTP:TTLTRG commands starting on page 6-254
To output a signal on the TTLTRG1 line each time the Trigger Timer cycles
execute the commands:
TRIG:SOUR TIMER
OUTP:TTLTRG1 ON
OUTP:TTLTRG:SOUR TRIG
When the INITiate[:IMMediate] command is sent, the HP E1419A builds
the input Scan List from the input channels you referenced when you
defined the algorithm with the ALG:DEF command above. The module also
enters the Waiting For Trigger State (see Figure 3-3). In this state, all that is
required to run the algorithm is a trigger event for each pass through the
input-calculate-output cycle. To initiate the module, send the command:
INIT
When an INIT command is executed, the driver checks several interrelated
settings programmed in the previous steps. If there are conflicts in these
settings an error message is placed in the Error Queue (read with the
SYST:ERR? command). Some examples:
•
If TRIG:SOUR is not TIMer then ARM:SOUR must be IMMediate.
•
The time it would take to execute all algorithms is longer than the
TRIG:TIMER interval currently set.
Once the module is INITiated it can accept triggers from any source
specified in TRIG:SOUR.
TRIG:SOUR TIMER
ARM:SOUR IMM
INIT
or
TRIG:SOUR TIMER
ARM:SOUR HOLD
INIT
ARM
select trig timer as trig source
select and enable TTLTRG1 line
each trigger output on TTLTRG1
module to Waiting for Trigger
State
(*RST default)
(*RST default)
INIT starts Timer triggers
INIT readies module
ARM starts Timer triggers.
Programming the HP E1419A 81