Agilent Technologies 3458A

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