Chapter 7 __________________________________________________ Host Computer Commands
VAISALA______________________________________________________________________ 321
7.19 Read Back Internal Tables and Parameters
(RBACK)
This command permits some of the RVP900 internal tables to be read back
for confirmation and diagnostic purposes. This command would not
generally be used during normal data acquisition and processing.
0916-166
The data that can be returned are:
0 Full operational parameter table from last SOPRM command.
1 Ray history array consisting of six words per ray for the last
40 rays (in reverse time order) that were processed. Each six-
word group holds:
a. Actual number of samples that went into the ray
b. Time since the last ray (in tenths of ms)
c. Ending azimuth TAG bits
d. Ending elevation TAG bits
e. Starting azimuth TAG bits
f. Starting elevation TAG bits
2 Angle sync table from last LDSYNC command.
3 Reserved (was AGC table)
4 Filter selection array from the last LFILT command. This
returns the filter selection codes, one per word, for all range
bins described by filter slot #0.
5 Reserved (was STC table)
6 Custom range normalization from last LDRNV command.
7 Samples of the TAG input lines at 4 ms intervals. The
sampling begins at the moment the RBACK command is
received, and continues until the output count is reached. Each
32-bit sample is output as a pair of 16-bit words:
a. Azimuth (TAG bits 0–15)
b. Elevation (TAG bits 16–31)
8 Doppler clutter filter coefficients (Same format as for
LFCOEFS command)
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
| | | | | | | | | | | | | | | | |
| Data to Show | | 1 0 1 1 0 | Command
|_______________________________|___________|___________________|
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
| | | | | | | | | | | | | | | | |
| Number of words to output | Input 1
|_______________________________________________________________|
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