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2
Features and Functions
Measurement Resolution
Resolution is expressed in number of digits the internal DMM can
measure or display on the front panel. You can set the resolution to 4, 5,
or 6 full digits, plus a "½" digit which can be "0" or "1". To increase the
measurement accuracy and improve noise rejection, select 6½ digits.
To increase the measurement speed, select 4½ digits.
• For ac voltage measurements, the resolution is fixed at 6½ digits.
• The specified resolution is used for all measurements on the selected
• Changing the number of digits does more than just change the
• The
• The instrument returns to 5½ digits when the measurement function is
Front Panel Operation: DMM or Channel (Configure) > INTEGRATION > NPLC
First, select the measurement function on the active channel. You are
automatically guided to the next level of the menu where you can select a
specific resolution.
Remote Interface Operation: Specify the resolution in the same units as
the measurement function, not in number of digits. For example, if the
function is dc voltage, specify the resolution in volts. For frequency,
specify the resolution in hertz.
You can select the resolution using parameters in the
MEASure?
10 Vdc range with 4½ digits of resolution on the specified channel.
18
The only way to control the reading rate for ac measurements is by
changing the channel delay (see
the highest frequency limit (see
channel. If you have applied Mx+B scaling or have assigned alarms to
the selected channel, those measurements are also made using the
specified resolution. Measurements taken during the Monitor function
also use the specified resolution.
resolution of the instrument. It also changes the integration time,
which is the period the instrument's analog- to- digital (A/D) converter
samples the input signal for a measurement. See
Integration Time"
on page 19 for more information.
and
CONFigure
which allows you to specify the resolution.
changed and after a Factory Reset (
Preset (
SYSTem:PRESet
command) does not change the resolution setting.
commands. For example, the following command selects the
CONF:VOLT:DC 10,0.001,(@3001)
page
53) or by setting the ac filter to
page
36).
commands contain an optional parameter
MEASure?
*RST
command) or Card Reset (
"Custom A/D
command). An Instrument
SYSTem:CPON
CONFigure
34980A User's Guide
and
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