Chapter 7 __________________________________________________ Host Computer Commands
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The RVP900 clutter filters are controlled by this word.
0001 FFT Processing Mode is a dedicated frequency-domain
approach; data are processed in batches of pulses (see
Section 6.2.2 Frequency Domain Processing- Doppler
Power Spectrum on page 198).
0010 Random Phase Processing Mode. Data from first and
second trips are dealiased in range based on knowledge of
the radar transmitter phase (see Section 6.8 Random Phase
Second Trip Processing on page 245).
0100 DPRT-1 Processing Mode. The trigger generator produces
alternate short and long pulses, and Doppler
autocorrelations are computed using only the short pairs
(see Section 6.6 Dual PRT Processing Mode on page 238).
0101 DPRT-2 Processing Mode. The trigger generator produces
alternate short and long pulses, and Doppler
autocorrelations are computed using both pairs (see
Section 6.6 Dual PRT Processing Mode on page 238).
11XX Four codes reserved for custom user modes.
Delay This delay is introduced prior to processing the next ray of
data whenever Dual- PRF velocity unfolding is enabled or
the RVP900 has been reconfigured by user commands. The
delay permits the clutter filter transients to settle down
following PRF and gain switches. The value is specified as
the number of pulses, and hence, the number of filter
iterations, to wait.
ZER If set, then the clutter filter's internal state variables are
zeroed prior to waiting the delay time. For some signal
conditions, this may give better results than allowing the
filter to naturally flow into the new data.
Window Selects the type of window that is applied to time series
data prior to computing power spectra via a DFT. Choices
are: 0:Rectangular, 1:Hamming, 2:Blackman, 3:Exact
Blackman, 4:VonHann.
Window Selects the type of window that is applied to time series
data prior to computing power spectra via a DFT. Choices
are: 0:Rectangular, 1:Hamming, 2:Blackman, 3:Exact
Blackman, 4:VonHann.
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