Chapter 4 _____________________________________________________ TTY Nonvolatile Setups
VAISALA______________________________________________________________________ 111
extrapolation that will is applied. Choosing 0 dB disables the algorithm
entirely.
Limits: 0dB to 5dB
Apply amplitude correction based on Burst/COHO: YES
Time constant of mean amplitude estimator: 70 pulses
The RVP900 can perform pulse–to–pulse amplitude correction of the
digital (I,Q) data stream based on the amplitude of the Burst/COHO input.
For details, see Section 6.1.7 Correction for Tx Power Fluctuations on page
194.
Limits: 10 pulses to 500 pulses
IFD Wide Dynamic Range Parameters
Channel separation: 20.00 dB, 0.0 deg
Maximum deviation : 0.50 dB, 5.0 deg
Overlap/Interpolate interval: 30.00 dB
These questions only appear if you have selected WDR in the Mc (see
Section 4.2.1 Mc — Top Level Configuration on page 104). The Channel
Separation and Overlap/Interpolate Interval should be determined from the
Pr printout described below. Sweep a SigGen across the shared power
region of the two channels to determine a representative channel
separation, along with the size of the overlap region at the top of the
HiGain channel within which that separation remains steady and constant,
i.e., unaffected by eventually approaching the noise floor of the LoGain
channel.
The RVP900 continually measures and updates the complex channel
separation during normal operation. Ratios of echoes that fall within the
overlap/interpolate interval are averaged over several minutes, thereby
tracking gain and phase variations that occur with temperature changes and
component aging. If the channel separation ever exceeds the specified
maximum deviation, the GI4S_IFDCHANERR bit (11) is set in GPARM
Immediate Status Word #4.
Interference Filter 0:None, Alg.1, Alg.2, Alg.3: 1
Threshold parameter C1: 10.00 dB
Threshold parameter C2: 12.00 dB
The RVP900 can optionally apply an interference filter to remove
impulsive-type noise from the demodulated (I,Q) data stream. For details,
see Section 6.1.5 Interference Filter on page 189.
Provide WSR88D legacy BATCH major mode: YES
Maximum range to unfold: 600.0 km
Low–PRF bins range averaged on each side: 2
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