Agilent Technologies 3458A User Manual page 194

MATH
194 Chapter 6 Command Reference
operation
The operation parameter choices are:
operation Numeric
Parameter Equiv.
OFF 0
CONT 1
CTHRM 3
DB 4
DBM 5
FILTER 6
FTHRM 8
NULL 9
PERC 10
PFAIL 11
RMS 12
SCALE 13
STAT 14
CTHRM2 16
K
CTHRM10 17
K
FTHRM2 18
K
FTHRM10 19
K
Description
Disables all enabled real-time math operations
Enables the previous math operation. To resume two
math operations, send MATH CONT,CONT
Result=temperature (Celsius) of a 5kW thermistor
(40653B). Function must be OHM or OHMF (10kW
range or higher).
Result = 20 x Log (reading/REF register). The REF
10
register is initialized to 1, yielding dBV.
Result =10 x log (reading
1O
Function must be ACV, DCV, or ACDCV.
Result = output of exponentially weighted digital
low-pass filter. Response is set by DEGREE register.
Result=temperature (Fahrenheit) of a 5kW thermistor
(40653B). Function must be OHM or OHMF (10kW
range or higher).
Result=reading-OFFSET register. The OFFSET register
is set to first reading—after that you can change it.
Result = ((reading - PERC register) / PERC register x
100.
Reading vs. MAX and MIN registers.
Result = squares reading, applies FILTER operation,
takes square root.
Result = (reading-OFFSET register) / SCALE register.
Performs statistical calculations on the present set of
readings and stores results in these registers:
SDEV = standard deviation
MEAN = average of readings
NSAMP = number of readings
UPPER = largest reading
LOWER = smallest reading
Result=temperature (Celsius) of a 2kW thermistor
(40653A). Function must be OHM or OHMF.
Result=temperature (Celsius) of a 10kW thermistor
(40653C). Function must be OHM or OHMF.
Result=temperature (Fahrenheit) of a 2kW thermistor
(40653A). Function must be OHM or OHMF.
Result=temperature (Fahrenheit) of a 10kW thermistor
(40653C). Function must be OHM or OHMF.
2
/RES register/1mW).