10
2.3.12 R/S, Run-Stop
The R/S run-stop key provides front panel control over data acquisition for both
channels simultaneously. If the channel is in SNGL measurement mode, each
R/S key press causes one reading to be taken. In CONT measurement mode, each
R/S key press toggles continuous data acquisition on and off.
The activity annunciator (Figure 2b) flashes to indicate that readings are being
taken on the displayed channel as indicated in the upper right hand corner of
the display. A steady glow indicates that the meter is armed and waiting for a
pulse or P-P waveform to arrive. The indicator is off when data acquisition on
the displayed channel has been stopped. In the special case that both chan-
nels are started together in DC CONT mode the readings will be synchronized
together with channel A readings leading channel B readings by about 70
µ
sec.
Otherwise the channels run independent of each other.
2.3.13 MODE, Measurement Mode
The Model 2835-C provides a number of measurement modes for acquiring
data. At power on, the meter checks the detector’s calibration module to
determine which measurement modes the detector supports. Table 3
describes the measurement modes available for each detector family.
Table 3 – Newport Detector Families and Available Measurement Modes
Low-Power
High-Power
Energy
DC CONT
䊉
䊉
DC SNGL
䊊
䊊
INTG
䊊
䊊
P-P CONT
䊊
P-P SNGL
䊊
CONT PULSE
䊉
SNGL PULSE
䊊
䊉
marks the default mode for the detector family.
Press the MODE key repeatedly until the desired mode is indicated in the mode
annunciator area of the display, see Table 4. When selecting a new mode, the
display units will change to appropriate default units. See Section 2.3.14 for
more details about units.
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