Vaisala RVP900, User Manual, Page: 109 / 484

The secondary
SQI
level is computed by multiplying the primary user-supplied
SQI
threshold by the
SLOPE
, and adding the
OFFSET
. See 7.9.2 Tuning for Optimal Performance
(page 229) .
Limits: SLOPE : 0.0 ... 2.0, OFFSET -2.0 ... 1.0
These parameters tune the phase whitening process for SZ(8/64) transmissions.
Whitening Parameters for Tx :SZ (8/64)
––––––––––––––––––––––––––––––––––––
Max power mismatch across octants: 4.0 dB High power rejection threshold: 8.0
dB Maximum KEY phase error: 12.0 deg
5.2.4 Mp — Processing Options
When RVP900 computes power spectra, the time series data are multiplied by a (real)
window before computing the Fourier Transform (DFT).
You can select the window through
SOPRM word #10 0:User , or force a particular window:
• In the IRIS application, the setting
0:User
refers to the window defined in the Setup
utility block RVP signal processing options.
• In the Ascope application, the setting
0:User
enables the Spect Win button.
At RVP900 start up, 0:User refers to the settings saved in rvp9.conf block
opprm.filter bits 9,10,11.
Default Spectral Window- 0:User , 1:Rect, 2:Hamming, 3:Blackman : 0
The power spectra computed within RVP900 are normally not constrained to be powers of
two in length. Answer
NO to reapply the constraint to mimic the behavior of older
processors
Allow continuous sizes for power spectra: YES
Spectrum Width
The following parameters control whether R0/R1/R2 or R0/R1 estimates are used to
compute the spectrum width (see 7.4.5 Spectrum Width Algorithms (page 204) and 8.4
Setup Operating Parameters (SOPRM) (page 239) ):
• Select
0
to unconditional disable the
R2
algorithms, regardless of what the host
computer requests in the
SOPRM
command.
• Select
2
to unconditionally enable
R2
processing. Bit-7 of
SOPRM
word #2 is the host
computer's interface to this function when the 1:User case is selected.
• IRIS radar application uploads R0/R1/R2 .
Chapter 5 – TTY Non-volatile Setups
107