Lambda SR1, Operation Manual, Page: 309 / 317

SR1 Reference 309
© 2014 Stanford Research Systems
5e-08 2.7
6.25e-08 2.35
7.5e-08 2.475
8.75e-08 2.5
1e-07 2.4
1.125e-07 2.65
1.25e-07 2.425
1.375e-07 2.575
1.5e-07 2.575
Arbitrary Waveform Files (.ARB)
SR1 arbitrary waveform files are ASCII text files containing columns of floating point numbers. For
instance:
0.0000
0.0001
2.0000000e-004
3.0000000e-004
4.0000000e-004
5.0000000e-004
6.0000000e-004
7.0000000e-004
8.0000000e-004
9.0000000e-004
Multiple (tab-separated) columns of values may be present in the file. If so, SR1 will prompt the user for
the correct column to use when loading the arbitrary waveform file.
Note that the absolute value of the sample values are disregarded when outputting an arbitrary waveform,
only the relative magnitudes of the sample values are important. To arrive at the absolute scaling, SR1
first estimates any overshoot that may occur due to the fact that the file samples may not be band
limited. The maximum value of the file waveform (including overshoot) is then scaled to the amplitude
value entered on the arbitrary waveform panel. For instance, if the file above was loaded and output with
an amplitude of 1 Vp the actual output would show a linear ramp from 0 Vp to 1 Vp.
Configuration and Display Files (.XML)
Configuration and Display files are XML files that specify instrument configuration and display data.
Because the data in these files contains multiple settings with many complex interactions it is not
recommended or necessary for users to modify configuration or display files.