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2074
User Manual
The Modulation
Panels
(n)PSK
4-22
The Modulation functions were designed over two separate panels,
as shown in Figures 4-13 and 4-15. The panels are invoked by
pressing the Modulation header and then one of the modulation
panels that appear below it (Figure 4-12). These panels provide
access to the modulation functions. The modulation functions that
are available on these panels are: (n)PSK and (n)QAM. The
modulation functions are programmed simultaneously for all
channels.
The Modulation Group is common to all modulation panels. It
contains an array of buttons that select the appropriate modulation
scheme. It also provides access to the CW (Carrier Waveform)
frequency setting. The CW frequency parameter is common to all of
the modulation functions.
Figure 4-12, the Modulation Panels
The (n)PSK panel contains parameters for controlling multiple
phase modulation options. To select one of the (n)PSK functions,
click on BPSK, QPSK, DPSK, OPSK, 8PSK, 16PSK, or User PSK.
The various parameters that control PSK features are described
below. Notice that the parameters are common or all channels and
therefore, there is no separation to individual channels.
Marker Index
The marker setting programs a specific step (index) in the control
data string to output a pulse at the SYNC output connector. The
SYNC State button must be turned on to generate the PSK marker
output.
Baud
The baud parameter sets the rate of which the generator steps
through the phase symbols.
Data Table
The Data Table provides means of programming the phase steps
sequence. An example of a 16PSK data table sequence is shown in
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