Agilent Technologies 34970A, User Manual, Page: 90 / 356

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Chapter 4 Features and Functions
Scanning
Scanning
The instrument allows you to combine a DMM (either internal or
external) with multiplexer channels to create a
scan . During a scan, the
instrument connects the DMM to the configured multiplexer channels
one at a time and makes a measurement on each channel.
Any channel that can be “read” by the instrument can also be included in
a scan. This includes any combination of temperature, voltage,
resistance, current, frequency, or period measurements on multiplexer
channels. A scan can also include a read of a digital port or a read of the
totalizer count on the multifunction module. Scanning is allowed with
the following modules:
• 34901A 20-Channel Multiplexer
• 34902A 16-Channel Multiplexer
• 34907A Multifunction Module (digital input and totalizer only)
• 34908A 40-Channel Single-Ended Multiplexer
Automated scanning
is not allowed with the actuator module, the matrix
module, or the RF multiplexer modules. In addition, a scan cannot
include a write to a digital port or a voltage output from a DAC channel.
However, you can write your own program to manually create a “scan” to
include these operations.
Rules for Scanning
• Before you can initiate a scan, you must set up a scan list to include
all desired multiplexer or digital channels. Channels which are not in
the scan list are skipped during the scan. The instrument
automatically scans the list of channels in ascending order from slot
100 through slot 300. Measurements are taken only during a scan
and only on those channels which are included in the scan list.
The “ ” (sample) annunciator turns on during each measurement.
34970A Refresh UG.book Page 90 Wednesday, February 17, 2010 12:34 PM