Promax Promax TV EXPLORER HD ISDB-Tb, Руководство пользователя

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USER’S MANUAL. TV EXPLORER HD ISDB-T/T
B
Page 72 11/2010
To access the spectrogram, first press the button [13] to access the spectrum
analyser. Then you should set the parameters reference, span and frequency. Then
press [22] and select SPECTROGRAM using the cursors or the variable knob. The
figure below shows the initial screen.
Figure 51.- First Screen.
On the X -axis the time variables references are showed. At the bottom right
corner, the capture elapsed time is displayed, in seconds. At the bottom center the
T.span defines the seconds that will be displayed on the screen. For example, if the
T.span is 60s, therefore the last 60s captured, will be displayed on the screen. On the
left corner the t variable is at time can be "end - time (s)" or "begin + time (s)".
The tag “end” indicates how many seconds you are from the last capture. To
select this option, go to the configuration menu and select the temporal reference “end”.
The tag “begin” indicates how many seconds you are from when starting the
capture. To select this option, go to the configuration menu and select the temporal
reference “beginning”.
On the Y -axis are placed the frequency variables. In this axis the initial and final
frequencies are showed and depend on the Spectrum Analyzer configuration. For
example if the Spectrum Analyzer frequency is 650 MHz and the Spam=100 MHz, the
Spectrogram will show as initial frequency 601MHz and end frequency 701MHz.
Next to the final frequency the cursor frequency and its signal level are displayed.
To move among the parameters press the cursor keys UP or DOWN .
To change a parameter, press the arrow keys LEFT or RIGHT or use the rotary
selector.