Keysight Technologies 86120B, User Manual

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85
Programming
Making Measurements
Making Measurements
Making measurements remotely involves changing the Keysight 86120B’s settings,
performing a measurement, and then returning the data to the computer. The simpli-
fied block diagram of the Keysight 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 uncorrected
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 measure-
ment mode is available for quicker measurement acquisition. But, because only
8,192 data values are collected in fast-update measurement mode, the ability to
resolve closely spaced signals is reduced.
After collecting the uncorrected data, the Keysight 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 WLIMit:STARt to