Frequency Display Mode:
Note: The "Filter" Window enables to give a representation of the characteristics of the digital matched
filter used in the demodulation process just before the Bit Decision. Depending on the User's selection,
this representation can be done in the time domain (pulse response, i.e. taps of the digital filter) or in
the frequency domain (amplitude and phase responses). If the DEAF filter mode is selected, the
display is continuously updated with new computed filter characteristics. The selection of the filter type
and consequently its characteristics is done in the "Global" Window (Matched Filter box).
Selection of the display mode:
To select the time domain display mode, click on Time
To select the frequency domain display mode, click on Frequency
Control of the DEAF mode:
To select the auto-adaptive mode and to get a dynamical update display of the filtering
characteristics, click on DEAF
Saving the filter parameters in a custom filter file (save and learn mode):
In DEAF mode Click on Store to freeze the display and to temporary save the filter
characteristics in a buffer.
Select a filter file number from 0 to 1000, this number will be used to recall the custom filter
in the DEMOD global window.
Click on Save to store the filter parameters in the selected custom file.
© Safran Data Systems – IMP000074 e14r1
HIGH DATA RATE RECEIVER
HDR-4G+ USER'S MANUAL
Figure 131: Filter: Frequency Display Selection
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It cannot be duplicated or distributed without expressed written consent.
Ref.
DTU 100782
Is.Rev
3.5
Date:
June 1, 2021
Safran Data Systems
.
Page 288