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Examples
88 Relay Driver Module Command Reference
•
Assigning External Trigger: A switchbox assigned with TRIGger:SOURce
EXTernal remains assigned to that source until the switchbox trigger source is
changed to BUS, HOLD, or IMMediate. When the source is changed, the
external trigger source is available to the next switchbox which requests it
(with a TRIGger:SOURce EXTernal command). If a switchbox requests an
external trigger input already assigned to another switchbox an error is
generated.
•
Using Bus Triggers: To trigger the switchbox with TRIGger:SOURce BUS
selected, use the IEEE 488.2 common command *TRG or the GPIB Group
Execute Trigger (GET) command.
•
Using EXTernal, TTLTrgn, and ECLTn Trigger Inputs: After using
TRIGger:SOURce EXT | TTLTrgn |ECLTn, the selected trigger source
remains assigned to the Agilent E1339A driver until it is relinquished through
use of the TRIG:SOUR BUS|HOLD|IMM command.
While the trigger is in use by the E1339A driver, no other drivers operating
on the Agilent E1306 or Agilent E1406 command module will have access to
that particular trigger source. Likewise, other drivers may consume trigger
resources which may deny access to a particular trigger by the Agilent E1339A
driver.
You should always release custody of trigger sources after completion of an
activity by setting the trigger source to BUS, HOLD, or IMMediate (i.e.,
TRIG:SOUR BUS|HOLD|IMM).
•
Trig Out Port Shared by Switchboxes: See the OUTPut command.
•
Related Commands: ABORt, [ROUTe:]SCAN, OUTPut
•
*RST Condition: TRIGger:SOURce IMMediate
Example: Scanning Using External Triggers
This example uses external triggering (TRIG:SOUR EXT) to scan channels 0
through 3 of a single-module switchbox. The trigger source to advance the scan
is the input to the "Trig In" port on an Agilent E1406 Command Module. When INIT
is executed, the scan is started and channel 00 is closed. Then, each trigger received
at the "Trig In" BNC port advances the scan to the next channel.
TRIG:SOUR EXT
SCAN (@100:103)
INIT
trigger externally
!Select external triggering
!Set channel list
!Start scanning cycle
!Advance scan to next channel
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