Справочник Пользователя для Nautel Maine Inc VS300
VS300 Operations and Maintenance Manual
Operating the transmitter
Issue 0.1 2011-03-11
Page 2-27
Figure 2.18: Spectrum Analyzer
Spectrum analyzer
. The carrier level is normalized to its unmodulated carrier level at 0 dB. Graph center
is always at the carrier frequency.
Click on the panel to display a cursor in the approximate area. The cursor position (frequency and
amplitude) is noted in the upper, right-hand corner of the panel. Click in other areas of the panel to
provide a coarse adjustment of the cursor position.
amplitude) is noted in the upper, right-hand corner of the panel. Click in other areas of the panel to
provide a coarse adjustment of the cursor position.
Use the left and right buttons to make fine adjustments to the cursor position.
Use the up or down button to maximize (if minimized) or minimize (if maximized) the panel size.
Use the “peak” button to place the cursor on the next successive peak in the spectrum.
Use the “cog” button to gain access to spectrum settings (see
) such as resolution
bandwidth, span, averaging rate and the actual measurement source (FM or MPX) that is being
displayed. Click
displayed. Click
OK
to save changes or
X
to discard changes and close the window.
Note:
The FM spectrum analyzer displays the ideal spectrum generated by the DSP. It is not necessarily
the same as the spectrum seen at the RF output.
the same as the spectrum seen at the RF output.
Peak Cog