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Using BUS Triggers
with an External Device
to Scan Channels
50 HP E1476A Switchbox Application Examples
This example uses the
closures with the HP 3457A Multimeter. A DC voltage measurement is
performed. Measurement synchronization is attained by:
-- HP E1406A TTL Trig Out
used by the Multiplexer to trigger the multimeter for a
measurement.
-- HP 3457A TTL Ext Trig
used by the multimeter to know when to initiate a measurement.
Measurement Set-Up
•
Digital Multimeter has an HP-IB select code = 7, primary address = 22
(it is addressed as 722).
•
E1476A has an HP-IB select code = 7 and primary address = 09 and
secondary address = 14 (it is addressed as 70914).
•
Controller is an HP Series 200/300/400 Computer with HP BASIC.
Figure 2-8. Scanning with an External Device
trigger (
or
BUS
GET
*TRG
) to synchronize channel
Chapter 2
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