Filter
Top Products
4-88
Programming Commands
SENSe Subsystem
DATA?
Queries the time domain samples of the input laser line.
Syntax
:SENSe:DATA?
Attribute
Summary
Preset State: none
SCPI Compliance: instrument specific
Query Only
Description Be prepared to process a large amount of data when this query is
sent. The amount of data returned depends on the measurement
update state of the instrument which is set using the resolution argu-
ment of an instrument function. Refer to “Measurement Instructions”
on page 4- 15.
When NORMAL measurement update is specified, over 2,200 kilobytes
of data (2
17
values) can be returned to the computer. When FAS T mea-
surement update is specified, over 1,100 kilobytes of data (2
16
values)
can be returned.
The floating point values are scaled from 1.000 to 1.999756 (1 + 4095/
4096). Amplitude values are not calibrated.
The input laser line(s) generate an interference pattern on the photo-
detector as a function of the Michelson interferometer optical path
delay. The time domain data is sampled at uniform optical path delay
increments of the reference laser wavelength, or 0.632991 microns.
When NORMAL measurement update is selected, the first data value is
sampled at –41.48 mm optical path delay, and the last value is sam-
pled at +41.48 mm optical path delay. When FAST measurement update
is selected, the first data value is sampled at +20.74 mm optical path
delay, and the last value is sampled at –20.74 mm optical path delay.
The data value that corresponds to zero optical path delay is approxi-
mately, but not exactly, located in the center of the time domain data.
If your program is aborted or interrupted after sending this query, the
Agilent 86120C continues to process the data but does not place it in
the output buffer. Because of the amount of data processed, the
instrument will not respond to any new commands in its input buffer
for 30 or 40 seconds.