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Programming
Making Measurements
Making Measurements
Making measurements remotely involves changing the Agilent 86120B’s set-
tings, performing a measurement, and then returning the data to the com-
puter. The simplified block diagram of the Agilent 86120B shown here lists
some of the available programming commands. Each command is placed next
to the instrument section it configures or queries data from.
Notice that there are two buffers from which data can be queried: an uncor-
rected data buffer and a corrected data buffer. With each scan of the input
wavelength range, the analog-to-digital converter loads 65,536 data values into
the uncorrected data buffer. This is considered to be one “measurement”. A
fast-update measurement mode is available for quicker measurement acquisi-
tion. But, because only 8,192 data values are collected in fast-update measure-
ment mode, the ability to resolve closely spaced signals is reduced.
After collecting the uncorrected data, the Agilent 86120B searches the data
for the first 100 peak responses. (Searching starts at 1700 nm and progresses
towards 700 nm for WLIMit OFF. If WLIMit is on, searching starts at