Nautel NX25, Operation And Maintenance Manual

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NX300 Operations and Maintenance Manual Operating the transmitter
Page 2-34 Issue 3.0 2012-11-01
AM-AM and AM-PM correction screens.
The exciter linearizes the transmitter’s magnitude
(envelope) path and drive signal by using two correction parameters -
AM-AM Correction
(see
Figure 2.20 ) and
AM-PM Correction
(see Figure 2.21 on page 2-35 ), which can be viewed as tool
menu panels.
Figure 2.20: AM-AM Correction
AM-AM correction.
This panel displays the amplitude correction being applied to the magnitude
signal. The x-axis represents the signal amplitude and the y-axis represents the gain correction applied
for a given amplitude value.
Touch on the panel to display a cursor in the approximate area on the trace. The cursor position
(LUT index and gain) 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.
Use the up or down button to maximize (if it was minimized) or minimize (if it was maximized) the
panel size.