Explanation Of Nouns; Load A Reference Waveform; Load Function Menu - Tenma 72-2650 Operating Manual

The frequency resolution
of Hamming window is
Hamming
slightly superior to
Hanning window.
The best amplitude
resolution and the
Blackman
worst frequency
resolution.

Explanation of nouns

FFT resolution: defined as the quotient of sampling
and operation point. When the number of operation
points are fixed, the lower the sampling rate is, the
better the FFT resolution will be.
Nyquist frequency: for waveform with maximum
frequency of f, at least 2f sampling rate is required to
reconstruct original waveform. It is also called Nyquist
rule, where f refers to Nyquist frequency, while 2f
refers to Nyquist sampling rate.
20
72-2650/72-10510/72-8225A /72-8705A/72-8710A user manual
Signal levels, before and
after transient state or short
pulse, are of large difference.
Mainly used for single
frequency signal seeking
for higher subharmonic.

Load a Reference Waveform

Any of the pre-saved waveforms
pressing the REF button on the 72-2650 DSO. For
72-10510/72-8225A/72-8705A/72-8710A, pressing the
STORAGE button will load the pre-saved waveform.
Please see the "Storage and Load" section for how to
save a waveform.
After pressing the REF button, the user should be able
to select two of the RefA F1 and RefB F2 on the
function menu to load the pre-saved waveform.
Assume that you select RefA, you will be able to see
the load function menu as below.
Table 2-5 Load function menu
Function
Settings Description
Menu
Destination (Position of the internal
memory) where the waveform will be
loaded.
Source (@) 1～20
There are 20 sets of internal memory
available to storewaveforms
navigated by the multipurpose knob.
can be loaded by