Agilent Technologies 34970A, User Manual, Page: 91 / 356

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Chapter 4 Features and Functions
Scanning
4
• You can store up to 50,000 readings in non-volatile memory during a
scan. Readings are stored only during a scan and all readings are
automatically time stamped. If memory overflows (the
MEM
annunciator will turn on), a status register bit is set and new
readings will overwrite the first readings stored (the most recent
readings are always preserved). You can read the contents of memory
at any time, even during a scan. Reading memory
is not cleared when
you read it.
• Each time you start a new scan, the instrument clears all readings
(including alarm data) stored in reading memory from the previous
scan. Therefore, the contents of memory are always from the most
recent scan.
• While a scan is running, the instrument automatically stores the
minimum and maximum readings and calculates the average for each
channel. You can read these values at any time, even during a scan.
• Mx+B scaling and alarm limits are applied to measurements during a
scan and all data is stored in non-volatile memory. You can read the
contents of reading memory or the alarm queue at any time, even
during a scan.
• In the Monitor function, the instrument takes readings as often as it
can on a single channel, even during a scan ( see Single-Channel
Monitoring on page 171) . This feature is useful for troubleshooting
your system before a test or for watching an important signal.
• If you abort a scan that is running, the instrument will complete the
one measurement in progress (the entire scan will not be completed)
and the scan will stop. You cannot resume the scan from where it left
off. If you initiate a new scan, all readings are cleared from memory.
• When you add a multiplexer channel to a scan list, that entire module
is dedicated to the scan. The instrument issues a Card Reset to open
all channels on that module. You cannot perform low-level close or
open operations on any channels on that module (even those channels
that are not configured).
34970A Refresh UG.book Page 91 Wednesday, February 17, 2010 12:34 PM