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Analysis Tools
WAVECOM Decoder W74PC, W-PCI/e, W-CODE, W-CLOUD Manual V9.1.0
Plane” in most MIL/STANAG modes to show the phase constellation before (in yellow) and after (in blue)
the equalizer. The phase display in yellow would correspond to the display in the traditional phase plane.
User can display this dedicated phase plane in
Options
->
Show Phase Plane
.
PSK Code Check (HF, DIR and SUB)
PSK code check is started by selecting the
PSK Code Check
button or from
HF-Modes | Analysis | PSK
Code Check
.
The PSK code check is initialized with default values. In many cases the user needs to set up the following
values:
center frequency
baudrate
number of channels
bandwidth (use the pb tuning to enter the correct bandwidth
The center frequency can be set by using the cursors in the
FFT Window
as shown
below, or by selecting
Center
in the
Demodulator
menu. The baud rate can also be configured.
The number of channels is set to one for all single channel modes and to two for two channel modes like
PACTOR II/II-FEC. Modes with more than one channel need the shift settings in addition to the center fre-
quency.
Note:
The accuracy of the center frequency and shift settings is very important and directly influences the
performance of the decoding.
After each configuration change, the PSK code check automatically restarts with the new values. The val-
ues of these parameters are displayed in the appropriate fields after the setting has completed.
If two or more different systems are identified, or if more than five proven transmission errors occur, an
automatic switch to a mode will not take place.
