Spectrogram (Only Tv Explorer Ii+) - Promax TV EXPLORER II User Manual

USER'S MANUAL. TV EXPLORER II/II+

5.16.2 Spectrogram (only TV EXPLORER II+)

The Spectrogram is a useful tool and it has been designed to detect problems in a
wide range of frequencies. These problems could appear at any time and sporadically.
The Spectrogram function makes a graphical representation of the frequency.
Signal level regards to the time. Each level is represented with a different colour, the Y-
axis belongs to frequency and the X-axis to time. Therefore a colour map is showed on
the display, see figure 46. Any frequency signal level could be displayed at any time
reference using the cursors or the variable knob. This tool is especially useful when a
level signal analysis is going to be processed during a long period of time. When the
process is finished the capture could be showed and any anomaly will be easily detected
at any time.
959
759
t -
To activate the Spectrogram, the Spectrum analyzer should be performed; these
parameters will be the reference, Span and frequency.
Once the spectrum has been performed, press
SPECTROGRAM using the cursors or the variable knob. The figure 47 shows the initial
screen.
1000
501
t -
09/2009
57.2
859
70
20
30 s. T.span:
Figure 47.- Spectrogram.
750 - - -
30 s. T.span:
Figure 48.- Initial display
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