Math Operations - HP 34401A User Manual

Chapter 3 Features and Functions

Math Operations

Math Operations
There are five math operations available, only one of which can be
enabled at a time. Each math operation performs a mathematical
operation on each reading or stores data on a series of readings.
The selected math operation remains in effect until you disable it,
change functions, turn off the power, or perform a remote interface
reset. The math operations use one or more internal registers. You can
preset the values in some of the registers, while others hold the results
of the math operation.
The following table shows the math/measurement function combinations
allowed. Each "
math operation that is not allowed with the present measurement
function, math is turned off. If you select a valid math operation and
then change to one that is invalid, a "Settings conflict" error is
generated from the remote interface.
DC V AC V
Null X
X
X
Min-Max X
X
X
dB
X
X
dBm
X X
Limit
From the front panel, you enable a math operation by pressing the
appropriate key. The exception is Limit Test which you enable using the
LIMIT TEST
From the remote interface, the math operations and registers are
controlled using commands within the CALCulate command
subsystem. First, select the math operation you want to use (the default
function is null):
CALCulate:FUNCtion {NULL|DB|DBM|AVERage|LIMit}
Then, enable the selected math function by turning the math state on:
CALCulate:STATe ON
" indicates an allowable combination. If you choose a
X
DC I AC I 2W
X X X
X X X
X X X
command in the
MATH MENU
4W Freq Per Cont
X
X X
X
X X
X X X
.
3
Diode Ratio
X
X
63