BASIC DHM OPERATION
Figure 2-1. Model 199 Front Panel
2.3 FRONT PANEL FAMILIARIZATION
AUTO is off.
The front panel of the Model 199 is shown in Figure 2-l.
Zero Indicator-ZERO will be on when the zero mode is
The following paragraphs describe the vaious components
enabled. Zero is used to subtracf a baseline value from the
of the front panel in detail.
measured signal. ZERO will flash when zero has been
enabled, but a reading that has yet to be triggered.
2.3.1 Display and Indicators
Display-The l&character alphanumeric LED display is
used to display numeric data, range and functions
mnemonics (for ample, mV), as well as messages. When
the optional Model 1992 Scanner is being used, the chan-
nel number is displayed in the right most digit.
Function Indicators-The indicator or indicators that are
on identify the measurement function presently selected.
Range Indicator-The AUTO indicator will be on when
autoranging is selected. Manual ranging is in effect when
Filter Indicator-FIXR indicates when the running average
filter is enabled. A flashing FLTR indicates the filter has
not yet settled and shows the update rate.
Remote Indicator-REM shows when the Model 199 is in
the IEEE-488 remote state. See Section 3 for move detailed
IEEE-488 information.
Data Store Indicators-ST0 shows when the instrument
is storing data in the data store buffer. RCL Indicates that
data store information is being displayed (RCL flashes
when data-store is full).
Display Update Indication-The decimal point flashes to
indicate the display update rate.
2-3
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