Nautel NX5 AM, Operation & Maintenance Manual

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NX5 OPERATION & MAINTENANCE MANUAL OPERATING THE TRANSMITTER
VERSION 0.1 2015-08-01 PAGE 3.2.37
Equalizer Screens
The NX5’s exciter includes a fixed equalizer to optimize audio and digital performance. There are three
menus available in the instrument panels -
EQ Frequency
(see Figure 3.2.25 ),
EQ Impulse Response
(see Figure 3.2.26 on page 3.2.38 ) and
EQ Filter Delay
(see Figure 3.2.27 on page 3.2.39 ). Coefficients
are determined to compensate for the frequency response of the transmitter. All frequencies shown are
relative to the channel frequency.
Figure 3.2.25: EQ Frequency Response
EQ Frequency Response
See Figure 3.2.25 . This panel displays the frequency response of the active exciter’s equalization filter. It
displays the gain of the filter versus frequency as it applies to the magnitude of the modulating signal.
A dashed line is displayed at the 0 dB level.
Click on the panel to display a cursor in the approximate area on the trace. The cursor position
(frequency and magnitude) is noted in the upper, right-hand corner of the panel. Click in other areas of
the instrument 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 it was minimized) or minimize (if it was maximized) the
panel size.