Nautel VX150, Operation & Maintenance Manual

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VX150 TO VX2 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER
PAGE 2.2.22 VERSION 1.0 2022-12-08
Spectrum Analyzer
See Figure 2.2.13 . The carrier level is normalized to its unmodulated carrier level at 0 dB. The graph
center is always at the carrier frequency, as defined by the active preset’s frequency.
Figure 2.2.13: Spectrum Analyzer Panel
Masks are shown based on transmission mode and are defined by the latest versions of the following
standards:
– European Standard: ETSI EN 302 018-2
– FCC CFR 47, Part 73.317 and IC BETS-6e
Refer Spectrum Mask, on page 2.2.62 to set the mask type.
NOTE
: The spectrum analyzer may display artifacts (spurs) as some operating carrier frequencies that
are a function of the analyzer and are not actually present on the output of the transmitter. If these
spurious emissions are observed on the spectrum analyzer, Nautel recommends that a calibrated,
external spectrum analyzer be used to verify the presence of spurs.
Click the panel to display a cursor on the nearest peak on the spectrum. The cursor position (frequency
and amplitude) is noted in the upper, right-hand corner of the panel.
Click and hold the left mouse button and move the cursor to make fine adjustments.
Click the “Settings” button to gain access to spectrum settings (see Figure 2.2.14 ) such as:
Mask
Settings