Arcom Digital Quiver XT, Руководство пользователя

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peak which remains constant. The benefit is that in smaller time delay window the scan
is completed much faster than in the full-time delay span saving time in the field.
Selecting CPD detection filter bandwidth
The return signal input filter bandwidth can be
changed to reduce the influence of CW like carriers in
the return path on the radar signal processing
circuitry. If they are present within the 8-16 MHz and
elevate the noise floor on the radar screen the
bandwidth of the radar input filter spectrum can be
shift up to reduce their impact. That allows for
selection of a quieter frequency band where
processed signals will create clearer CPD peaks. For
changing the filter bandwidth set the BPF freq. min.
and BPF freq. max parameters by selecting menu
items 2 or 3 accordingly and pressing <Enter>. The
following dialog box will open:
From the frequency list select desired value and press <Enter> to confirm. Then
adjust the other end of the bandpass filter in the same fashion if necessary. It is
important to remember that the more narrowly the filter is set the lower the detected
CPD peak will be and its peak will be slightly wider.
Selecting noise suppression
For further improvement of noise cancellation, it is possible to select High Noise
Suppression. In High Noise Suppression mode, the radar processes a larger number of
signal samples and creates a CPD response based on more information collected
during a longer time period. The user will see on the screen the noise floor decreasing
after each scan while the CPD peak will remain at the same level.
To select High Noise Suppression mode highlight menu item Noise Suppression
with the cursor buttons or hit 4 on keypad and press <Enter>.
Then in the appearing dialog box select High using the ^ or v cursor key and press
<Enter> and the screen will look like shown on a picture below: