Features and Functions 3
Keysight 34980A Mainframe User’s Guide 119
General Measurement Configuration
This section contains general information to help you configure the instrument for
making measurements. Since these parameters are used by several measurement
functions, the discussion is combined into one common section. Refer to the later
sections in this chapter for more information on parameters specific to each
measurement function.
Overview of Measurement Modes
Two modes of operation are available with the 34980A, depending on the level of
switching and measurement that you wish to directly control: the Stand-Alone
DMM Mode and the Scanning Mode.
Stand-Alone DMM Mode
In the Stand-Alone DMM Mode, the internal DMM makes measurements of
whatever signals are present on the Analog Buses. In this mode, you have full
control of what channel relays are closed and connected to the appropriate
Analog Bus for the measurement. You can route your signals directly to the
internal DMM using the 34980A multiplexer and matrix modules, or you can
connect to external signals via the Analog Bus connector located on instrument’s
rear panel (see “Analog Buses” on page 122).
Front Panel Operation:
– To configure the most common measurement parameters for the internal
DMM, use the DMM (Configure) key.
– To close the desired channel relays and Analog Bus relays, use the Close key.
The Analog Bus relays on the multiplexer and matrix modules are numbered
s911, s912, s913, etc.
– To auto-trigger the internal DMM and display continuous readings, press the DMM
(Measure) key. Press the DMM (Measure) key again to stop taking measurements.
– For additional triggering control and to store DMM readings in memory, use
the Scan (Configure) key to set the triggering parameters, and then press and
hold the Scan (Measure) key to initiate the DMM measurement. These
selections are available only for stand-alone DMM use when a scan list has not
been defined (see “Stand-Alone DMM Mode” on page 119).
– To stop storing readings in memory during long measurements, press and hold
the Scan (Measure) key.
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