Math - Keithley 2701 User Manual

Model 2701 User's Manual
Example #3 — The following command sequence configures channel 101 of the
Model 7700 to zero, correct the DCV input when it is scanned.
NOTE
FUNC 'VOLT',(@101)
ROUT:CLOS (@101)
VOLT:REF:ACQ (@101)
VOLT:REF:STAT ON,(@101)

Math

The Model 2701 has three built-in math calculations that are accessed from the MATH
menu: mX+b, percent, and reciprocal (1/X). Figure 5-1 shows the MATH menu tree. Note
that the settings shown in the menu tree are the factory defaults.
NOTE
Figure 5-1
MATH menu tree
M: +1.000000 ^
B: +00.00000 m
UNITS: X
NOTE
The following example can be run from the KE2700 Instrument Driver using the
example named "Relative3" in Table G-1 of Appendix G.
The various instrument operations, including Math, are performed on the input
signal in a sequential manner. See "Signal processing sequence," page D-2, for
details. It includes flowcharts showing where in the processing sequence that the
Math operation is performed.
SHIFT
MATH
mX+B PERCENT
REF: +1.000000 ^
A Math operation can be used with the ratio and channel average calculation.
The ratio or channel average reading will be used in the calculation for the
selected math function.
Rel, Math, Ratio, Channel Average, dB
' Select DCV for channel 101.
' Close channel 101.
' Use input to channel 101 as rel value.
' Enable rel.
1/X
5-7