Burst pulse timing plot (Pb)

For magnetron radars, RVP10 relies on samples of the transmit pulse to lock the phase of its synthesized I and Q data and to run the AFC feedback loop.

Use the Burst pulse timing (Pb) plot to view and adjust the trigger timing and sampling window so that the burst pulse is correctly measured.

This is used, for example, after radar installation, or when troubleshooting the radar system. Configuring the Burst pulse timing needs to be done for each pulse width. Vaisala weather radars have 4 pre-defined pulse widths, and this plot is used for fine-tuning the transmitter.

You can modify the pulse and the triggers as follows with the Pb plot:

• Impulse response length: select the pulse, and modify the width of the window
• Aperture and start of the AFC window: select a portion of the Tx signal that will be used for sampling the frequency for AFC (only relevant for magnetron transmitters)
• Trigger timing: shift triggers left or right. Each trigger has its own length and start time with respect to each other (defined in the Mt menu). In the Burst pulse timing plot, all the triggers are moved simultaneously as a group. The number of triggers for the pulses is defined in the Mt menu.
• You can select the IF channel. The definition of the channels depends on the systems.