Nautel NX15, Operation And Maintenance Manual

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NX15/NX25 Operations and Maintenance Manual Operating the transmitter
Page 2-32 Issue 6.0 2019-01-31
Equalizer screens.
The NX15/NX25’s exciter includes a fixed equalizer to optimize audio
performance. There are three menus available in the tool menu panels -
EQ Frequency
(see
Figure 2.17 ),
EQ Impulse Response
(see Figure 2.18 on page 2-34 ) and
EQ Filter Delay
(see
Figure 2.19 on page 2-35 ). Coefficients are selected based on your channel frequency. All
frequencies shown are relative to the channel frequency.
Figure 2.17: EQ Frequency Response
EQ frequency response
See Figure 2.17 . This panel displays the frequency response of the active exciter’s EQ filter.
Displays the gain of the filter with respect to frequency of the magnitude of the modulating
signal. A dashed line is displayed at the 0 dB level.
Touch 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.
Touch in other areas of the tool menu panel to provide a coarse adjustment of the cursor
position.
Use the left and right buttons to make fine adjustments.