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Table 4 – Model 2835-C Measurement Modes
Mode
Description
DC CONT
Measurement occurs at a programmable sample rate,
Section 2.4.7.
DC SNGL
A measurement is taken every time the meter receives a
trigger up to a 500Hz rate when two detector calibration
modules are plugged into the meter and 1000Hz for one.
(AUTO is disabled in SNGL mode.)
INTG
Measurements occur at 400Hz and are trapezoidally
integrated to get an energy result. An R/S key press or
external trigger sets the display to 0.0000 and sampling
starts. A second R/S keypress or external trigger termi-
nates integration.
P-P CONT
Acquisition is driven by the arrival of high-low peak
pairs. A measurement is processed for every high-low
peak pair up to a frequency of 500Hz when two detector
calibration modules are plugged into the meter and
1000Hz for one. NOTE: pair captures experience a
minimum 2 or 1 ms separation respectively.
P-P SNGL
A trigger
1
arms the meter to capture the next high-low
peak pair. Triggers can occur at a rate of up to 500Hz
when two detector calibration modules are plugged into
the meter and 1000Hz for one. (AUTO is disabled in
SNGL mode.)
CONT PULSE
The meter captures every energy pulse up to a frequency
of 500Hz when two detector calibration modules are
plugged into the meter and 1000Hz for one. Above this
rate, pulse acquisitions experience a minimum 2 or 1 ms
separation respectively.
SNGL PULSE
A trigger
1
arms the meter to capture the next energy
pulse. Triggers can occur at a rate of up to 500Hz when
two detector calibration modules are plugged into the
meter and 1000Hz for one. (AUTO is disabled in SNGL
mode.)
1
“Trigger” refers to a command to start or stop signal acquisition. Trigger
sources are the R/S key, the external trigger input and remote interface
commands.
2.3.14 UNITS, Display Units
Measurements can be displayed in various units. The set of units available at
any given time is determined by the detector type and the measurement
mode. Press the UNITS key repeatedly to cycle the display through the set of
available units. Table 5 describes the sets of available units for each detector
family as a function of the measurement mode.
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