Promax PROLINK-4 Manual De Instrucciones página 196

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').
4.10.1.3 Reference Level
The reference level corresponds to the level marked by the top horizontal line
appearing on the Spectrum Analyser mode screen. This function enables the reference
level to be defined between 70 and 130 dBµV in 10 dB steps. The default reference
level is 70 dBµV.
To alter the value of the reference level select the Spectrum Analyser mode
functions menu, turn the rotary selector [4] to select the Reference level function and
press it. The screen will show a window with the values which can be selected. Turn the
rotary selector [4] to the desired reference level and activate it by pressing the selector
again.
4.10.1.4 Dual Marker/Single Marker
(Only for level measurements) This function enables two tuning markers (Dual
marker) to be seen on the spectrum display. When you choose this option you can
select the active marker (Marker A or Marker B) or return to using only one marker
(Single marker).
Figure 41.- Spectrum Analyser mode with two tuning markers.
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USER'S MANUAL. PROLINK-4
02/2003