NV30/NV40 Operations and Maintenance Manual Operating the transmitter
Page 2-26 Issue 3.3 2014-12-10
Describing instrument panel options
The following table describes instrument panel options:
Table 2.2: Tool Menu Panels
Tool Description Reference
Spectrum Displays a spectrum analyzer, capable of monitoring
the transmitter’s RF output spectrum and various RF
sections of the exciter. An audio spectrum analyzer is
also available to allow viewing of the composite
baseband.
See page 2-30
EQ Frequency
Response
Displays the frequency response of the modulator’s
EQ filter.
See page 2-32
EQ Impulse
Response
Displays the impulse response of the modulator’s EQ
filter.
See page 2-33
EQ Filter Delay Displays the delay of the modulator’s EQ filter across
its bandwidth.
See page 2-34
AM-AM Correction Displays the amplitude compensation being applied to
the magnitude signal.
See page 2-35
AM-PM Correction Displays the phase compensation being applied to the
phase signal.
See page 2-36
Signal
Constellation
Displays the phase and amplitude of the symbols
being modulated within an OFDM sub-carrier as dots
on a cartesian graph. Also displays timing, MER and
data carrier information.
See page 2-37
Lissajous Plot Displays a Lissajous figure that represents the
resultant vector (magnitude and phase) for the
applicable channels (either L and R or I and Q).
See page 2-38
Power Distribution Displays a CCDF plot that indicates the probability of
exceeding a given power level, based on the average
power level. Aids in determining peak power
capability.
See page 2-39
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