Specifications

26
Subject to change without notice
9 Analysis
The HMO series oscilloscopes feature a variety of analysis
functions for the stored data sets which will be displayed on the
screen. For simple mathematical functions „Quick mathema-
tics“ is provided. The formula editor allows you to create more
complex functions and the linking of functions. The frequency
analysis is accessible by just pushing a key.
9.1 Quickmathematics
Pushing the MATH key on the front panel will call a short menu,
the key will light up red.
Next to the lowest soft menu key QM/MA the mode activated
will be indicated in red. QM stands for Quick Mathematics, MA
for extended mathematics. Pressing this soft menu key will
alternate between those two mathematics variants.
Fig. 9.1: Mathematics short menu
The predened mathematical functions can be switched in by
pushing the respective soft menu keys. If a function is active,
the black dots will change to red ones. If two were activated, the
remaining ones will be shown in grey. If you desire to perform
an addition, subtraction, multiplication or division between
two channels, rst make sure that QM is shown with a red
background. The associated short menu allows to select the
desired function.
Fig. 9.2: Quick mathematics menu
Analysis
The upper 3 menu keys allow you to select the sources as well
as the operation. All active channels are available as sources.
The available operations are addition and subtraction.
9.2 Formulaeditor
The HMO series offers 5 sets of mathematical formulas. Each
of these sets contains 5 equations which can be modied with
a formula editor in order to construct more complex mathema-
tical formulas. They are designated MA1 to MA5. The available
operations are:
– Addition
– Subtraction
– Multiplication
– Division
– Squaring
– Square root
– Absolute value
– Positive value
– Negative value
– Reciprocal value
– Inverted value
Fig. 9.3: Formula editor for a set of formulas
The sources for the equation in MA1 are the input channels
CH1, CH2, CH3, CH4 and a constant which can be dened. For
the formula MA2, MA1 is an additional source. For MA3 addi-
tional sources are MA1 and MA2. For MA4 additional sources
are MA1, MA2, and MA3. For MA5 additional sources are MA1
to MA4. It is possible to construct a total of 5 different sets
from these 5 equations which can be subsequently stored
and recalled.
Press the MATH key to access the formula editor, then select
„MA“ with the lowest soft menu key (i.e. MA is shown with a red
background), next press the MENU key in the vertical section
of the front panel. A menu will open in which the menu item
FORMULA SET will be shown with a blue background. Now the
desired formula set can be selected with the knob (there are 5
different ones). In this soft menu you may attribute names to
the formula sets (with a maximum of 8 characters), you may
load a formula set (from the internal memory or a USB memory
stick) you may store a formula set (into the internal memory
or onto an USB memory stick) and also modify a formula set.
Inputting of formulas is done by pressing the soft menu key
MODIFY. A menu will open in which the top entry EQUATION is
selected. The universal knob allows to select up to 5 equations
(standard names MA1 to MA5); if less than 5 are dened, the last
formula will lead to the eld NEW. With the soft menu key next
to ADD, the formula set may be extended by another formula. If
a formula was selected or newly added, the soft menu key next
to MODIFY is used to activate PARAMETER (this is activated if
the word is shown with a blue background) .
After selecting the operators and the operands, press the soft
menu key next to MODIFY to activate DISPLAY (if activated the