In this section:
Relative offset .......................................................................... 3-1
Instrument access .................................................................... 3-4
Calculations that you can apply to measurements ................... 3-6
Reading buffers ...................................................................... 3-10
Configuration lists ................................................................... 3-33
Sweep operation .................................................................... 3-51
Digital I/O ............................................................................... 3-62
Limit testing and binning ........................................................ 3-68
Triggering ............................................................................... 3-91
Trigger model ......................................................................... 3-95
TSP-Link System Expansion Interface ................................. 3-118
TSP-Net ............................................................................... 3-130
Relative offset
When making measurements, you may want to offset a known value that affects the measurement
value. This is typically used to offset current leaks.
The relative offset feature subtracts a set value or a baseline reading from measurement readings.
When you enable relative offset, all measurements are recorded as the difference between the actual
measured value and the relative offset value. The formula to calculate the offset value is:
Displayed value = Actual measured value
−
Relative offset value
When a relative offset value is established for a measurement function, the value is the same for all
ranges for that measurement function. For example, if 5 V is set as the relative offset value on the
20 V range, the relative offset value is also 5 V on the 2 V and 200 mV ranges.
On the front panel, when relative offset is enabled, the REL indicator to the right of the measured
value is displayed.
A relative offset value is saved for each function. If you change the measurement function, the
relative offset value is changed to the setting for that measurement function.
The relative offset is applied to the measurement after any math functions but before the limit test
functions. For more information on the order in which operations are performed, see
(on page 3-9).
Establishing a relative offset value
You can use the Model 2450 to automatically determine the relative offset, or you can assign a
specific relative offset value.
Section 3
Functions and features