USER’S MANUAL__________________________________________________________________
170 _________________________________________________________________ M211322EN-D
produce results all the way to the edges of the input data. This is the same
reason that the LOG plots do not extend across the full screen.
Because of this definition, it is valid to intercompare the "Total Power" and
"Filtered Power". The two numbers match exactly as long as all of the
incoming power falls within the passband of the FIR filter. The difference
between the two powers can be used as a measure of the "filter loss" for a
given pulse shape, that is, the portion of signal that is lost outside of the
filter's passband.
5.6 Pa — Plot Tx Waveform Ambiguity
The RVP900 is able to make radar observations using compressed pulse
waveforms. This opens up many new opportunities within the weather
radar community for using low-power solid-state transmitters that employ
very long pulse lengths (20 μsec to 80 μsec). Transmitters of this kind are
less expensive, both to build and to maintain, compared with traditional
Magnetron or Klystron systems.
However, the signal processing and waveform design that are required to
make good use of these long transmit pulses is also much more complex.
To help with this, the RVP900 provides the Pa (Plot Ambiguity) command
in which compressed transmit waveforms can be designed, studied, and
optimized. Within the Pa plots you can experiment with different
waveform designs, try out various bandwidth and pulse width options, and
examine and optimize the range/time sidelobes of your waveform.
NOTE
The "Total", "Filtered", and "MidSamp" values represent true RMS
power (that is, variance), and not merely a sum-of-squares. Thus, any DC
offset present in the A/D converter will not affect these power levels.
To Next Page
Loading...
Need help?
General