Operations and Maintenance Manual

Table Of Contents
VS300 Operations and Maintenance Manual Operating the transmitter
Page 2-32 Issue 10.0 2019-01-18
Table 2.3: Tool Menu Panels
Tool Menu Description Reference
Spectrum Displays a spectrum analyzer, capable of monitoring various
RF sections of the transmitter, including the RF output.
See page 2-35
EQ Frequency
Response
Displays the frequency response of the modulator’s EQ filter. See page 2-37
EQ Impulse
Response
Displays the impulse response of the modulator’s EQ filter. See page 2-38
EQ Filter Delay Displays the delay of the modulator’s EQ filter across its
bandwidth
See page 2-39
Lissajous Plot Displays a Lissajous figure that represents the relationship
between the two applicable channels (either L and R or I and
Q).
See page 2-40
Audio Processor
(optional)
Appears only when Orban Inside audio processor is installed
and enabled. Displays various audio processor meters that
indicate levels for inputs, AGC, gain reduction, multiplex
(MPX) power and composite. Refer to Enabling and Operating
the Orban Audio Processor on page 2-184 and the Orban
Optimod 5500 manual for detailed information on these
meters.
See page 2-184
Oscilloscope Displays an oscilloscope, capable of monitoring various audio
inputs and the precorrection forward/reverse signal.
See page 2-41
AM-AM Correction Tool menu available only when the transmitter is used
with a VSHD exciter. Displays the amplitude compensation
being applied to the magnitude signal.
See page 2-43
AM-PM Correction Tool menu available only when the transmitter is used
with a VSHD exciter. Displays the phase compensation being
applied to the phase signal.
See page 2-43
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 2-45
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 2-46