BK Precision 5491B - Math Functions; Percent

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Table 3-2 Available 2
nd
display parameters for different measurement functions
Primary Display
Secondary Display
DC V
AC V
dBm
dB
Hz
AC V
DC V
dBm
dB
Hz
DC V+AC V
dBm
dB
Hz
AC V
DC V
DC I
AC I
Hz
AC I
DC I
Hz
DC I+AC I
Hz
AC I
DC I
Hz
AC V/AC I
AC I/AC V
Percentage (%)
(Measuring value)
%
Comp
(Measuring value)
HI，IN，LO，PASS，FAIL
Max/Min
(Measuring value)
Max
Min
Note: When a 2
nd
parameter is displayed, the measurement range for that measurement is
based on the main measurement function (primary display).
3.9 Math Functions
The multimeter math operations are divided into three categories:
" Percent
" dB and dBm calculations
" Limit testing
The first two categories are discussed here; reading limit testing will be described in the following
chapter – “Measurement Options”.
3.9.1 Percent
If the percent calculation is selected, a reference value must be specified. The displayed reading will be
expressed as percent deviation from the reference value. The percentage calculation is performed using
the following formula:
referenc e
referenc eInput
Percent
−
=
Where: Input is the normal display reading
Reference is the user-entered constant
Percent is the displayed result
To configure the percent calculation, perform the following steps:
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