7849B
– 7859B – 7817B
p.
61
12 Spectrum analyzer
Pressing SPECTRUM gives access to the
SPECTRUM ANALYSER function.
(graphical representation
frequency / amplitude of the present signals in the input of the device)
Satellite
Terrestrial
2 predefined bandwidths 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 tuned according to the level of the signals measured.
Filters are automatically selected according to the « Span ».
The filter used is displayed on the upper left corner.
Parameters of the spectrum are:
Channel
: use a chan-
nel for the spectrum
(in terrestrial mode).
Cursor
: simply press the area
where you want to move or set the
cursor
Span :
frequency span around the
center frequency
Reference level
: can
be modified with up-
down arrows
List
: you can select a Pro-
gram (in the current list)
Frequency range
: can
be changed using the
arrows
Frequency
: value of the fre-
quency where the cursor is,
user can enter a frequency
value, or increase
– decrease
the frequency with <> keys
