Promax PROLINK-4C, Manual

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USER’S MANUAL. PROLINK-4C
02/2003 Page 79
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Figure 40.- Spectrum Analyser mode functions menu.
When turning the rotary selector clockwise active option moves downwards
while turning it anticlockwise active option moves upwards.
The downward pointing arrow at the bottom left of the menu means that there
are more functions available, to view these turn the rotary selector clockwise. Below we
describe the use of each function and its range of values.
4.10.1.1 Band Switching
Permits to switch from terrestrial (5-862 MHz) to satellite band (900-2150 MHz)
and vice versa.
4.10.1.2 Span
This function enables selecting the displayed frequency range in Spectrum
Analyser mode between Full (the entire band), 500 MHz, 200 MHz, 100 MHz, 50 MHz,
32 MHz, 16 MHz and 8 MHz (the latter two only in terrestrial bands).
To alter the span, select the functions menu, then turn the rotary selector [4] to
the Span function and press it. The screen will show a window with the spans which
can be selected. Turn the rotary selector [4] to the required span and activate it by
pressing the selector again.
In Full mode the measuring filter bandwidth used to display the spectrum is
always 1 MHz for terrestrial bands, and 4 MHz for satellite band. For the other spans
you can select the bandwidth using the Measure Bandwidth function on the same
functions menu. (See section '4.10.1.10 Bandwidth of the Spectrum Measuring Filter').