Safran CORTEX Series - Figure 131: Filter: Frequency Display Selection

HIGH DATA RATE RECEIVER
HDR-4G+ USER’S MANUAL
Ref. DTU 100782
Is.Rev 3.5
Date: June 1, 2021
© Safran Data Systems – IMP000074 e14r1
This document is the property of Safran Data Systems.
It cannot be duplicated or distributed without expressed written consent.
Page 288
 Frequency Display Mode:
Figure 131: Filter: Frequency Display Selection
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.