• 4 dB for the statistical linearization that is performed on signals that exceed the
saturation level. RVP900 can recover signal power accurately, even when the A/D
converter is driven beyond saturation. Velocity data is also valid, but spectral width may
be overestimated.
• 4 dB for usable dynamic range below the 0 dB SNR level. In practice, a coherent signal
at -4 dB SNR can easily be measured when 25 or more pulses are used.
The overall dynamic range at 1 MHz bandwidth (approximately 1 μsec transmit pulse) is
95+4+4 = 103 dB. For a 0.5 μsec pulse, the dynamic range is reduced to 100 dB, but it
increases to 106 dB for a 2.0 μsec pulse.
The following
figure shows a calibration curve demonstrating this performance, for which
the RVP900 digital bandwidth was set to 0.53 MHz. An external signal generator, with steps
of 1 dB, was used to measure the compression and detection thresholds.
Figure 18 Calibration Plot for a Stand-Alone 16-Bit IFDR
RVP900 User Guide M211322EN-J
68
To Next Page
Loading...