Chapter 5 _______________________________________________________ Plot-Assisted Setups
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CHAPTER 5
PLOT-ASSISTED SETUPS
The IFDR receiver module replaces virtually all of the IF components in a
traditional analog receiver. The alignment procedures for those analog
components are usually very tedious, and require continued maintenance
even after they are first performed. Subtle drifts in component
specifications often go unnoticed until they become so severe that the
radars data are compromised.
The RVP900 makes a big improvement over this by providing an
interactive graphical alignment procedure for burst pulse detection, Tx/Rx
phase locking, and calibration of the AFC feedback loop. You may view
the actual samples of the burst pulse and receiver waveform, examine their
frequency content, design an appropriate matched filter, and observe live
operation of the AFC. It is a simple matter to check the spectral purity of
the transmitter on a regular basis, and to discover the presence of any
unwanted noise or harmonics. Moreover, the RVP900 is able to track and
modify the initial settings so that proper operation is maintained even with
changes in temperature and aging of the microwave components.
The Plot-Assisted Setups are accessed using the various P commands
within the normal TTY setup interface. The RVP900 supports opcodes that
allow the host computer to monitor the data being plotted. The dspx utility
can display these plots directly on the workstation screen, and thus carry
out the graphical checkup and alignment procedures remotely through a
network.
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