Spectrum Analyser; Simplified Spectrum - Alcad 918 Serie Manuel D'utilisation

12 Spectrum analyser

Pressing SPECTRUM gives access to the SPECTRUM ANALYSER function.
2 modes are available: expert mode and simplified mode. This selection is made at Configuration
page.

12.1 Simplified Spectrum

Satellite
2 predefined bandwidth are available: terrestrial and satellite. To swap from satellite to terrestrial,
press the key, as shown on the bottom side of the screen.
The input attenuator is automatically setup according to the level of the signals measured.
Filters are automatically selected according to the « Span ».
The filter use dis displayed on the upper left corner.
Parameters of the spectrum are :
Frequency: value of the
frequency where the
cursor is, user can enter
a frequency value, or
increase – decrease the
frequency with +/- keys
Reference level:
can be modified
with up-down
arrows
X dB : attenuator
choice (auto, 5,
10, 15dB,...)
/div : amplitude
vertical scale 2dB,
5dB or 10dB
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Cursor : simply press the area where
you want to move or set the cursor
Span : frequency span around the
center frequency
Terrestrial
List: you can select a Program
(in the current list)
Channel:
use a channel
for the
spectrum (in
terrestrial
mode).
Frequency range: can be
changed using the
arrows