Read back internal tables and parameters (RBACK)

RBACK permits some RVP10 internal tables to be read back for confirmation and diagnostic purposes. This command is not generally used during normal data acquisition and processing.

 15  14  13  12  11  10   9   8   7   6   5   4   3   2   1   0
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|   |   |   |   |   |   |   |   |    |   |   |   |   |   |   |   |
|              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
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|   |   |   |   |   |   |   |   |    |   |   |   |   |   |   |   |
|                 Number of words to output                      |  Input 1 
|-------------------|--------------------------------------------|
Data returned by RBACK
Data number Description
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:

  • Number of samples that went into the ray
  • Time since the last ray (in tenths of ms)
  • Ending azimuth TAG bits
  • Ending elevation TAG bits
  • Starting azimuth TAG bits
  • 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:

  • Azimuth (TAG bits 0–15)
  • Elevation (TAG bits 16–31)
8 Doppler clutter filter coefficients (Same format as for LFCOEFS command)
9 Reserved (was LOG clutter filter coefficients)
10 Range mask spacing in cm for each pulse width
11 Current value of UIQ bits from Set/Clr all prior operations
12

Individual threshold configuration for each data type.

This allows read back of the threshold table set with the THRESH command. See Set Individual Thresholds (THRESH).

Outputs 7 words per data type.

Datatypes in the order specified in the selection mask.
13 Extended parameter information defined in struct dspExParmIO.
14 Minimum and maximum values of the optional I/O-62 A/D converter, sampled over at least one complete pulse period. 16-bit signed outputs represent the full range of the A/D converter. When the RVP98D backpanel is connected, the first Min/Max pair samples the LOGVideo input, the second pair samples the CathodePulse input, and the third and fourth pairs sample internal levels.
15 Returns an array of struct RVP9SpecFiltIO structures for each of the non-zero clutter filter definitions, beginning with #1. This is the same format used by the LFSPECS command to define each clutter filter. The order is as defined in the PPRMS_N_* #defines in rvp9.h.
16 Returns the identifiers of the currently active HydroClass classifier algorithms. The identifiers are encoded in sig_data_types.h.
17

Returns the nickname of the currently active HydroClass configuration.

The nickname can be used to label the possible customizations made to echo identification settings in the hydroclass-*-band.conf file.

It is impractical to save all modified parameters as metadata. The string of 16 characters is reported in a sequence of 8 words, each reporting 2 characters.