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Scanning With External Instruments
If your application doesn’t require the built-in measurement capabilities
of the HP 34970A, you can order it without the internal
DMM. In this
configuration, you can use the system for signal routing or control
applications. If you install a multiplexer plug-in module, you can use the
system for scanning with an external instrument. You can connect an
external instrument (such as a
DMM) to the multiplexer COM terminal.
To control scanning with an external instrument, two control lines are
provided. When the HP 34970A and the external instrument are properly
configured, you can synchronize a scan sequence between the two.
H
Input
Channels
L
H
L
External DMM
H
L
H
L
Common Terminals
(COM)
VM Complete OUT Ext Trig IN
GND
Ext Trig IN
Channel Closed OUT
External DMM
HP 34970A
4
Chapter 4 Features and Functions
Scanning With External Instruments
95