Vaisala Hydromet Data Collection Platform - Manual (Page 169)

Chapter 4 ________________________________________________ Configuring Telemetry Options
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Pseudo-Binary Report Format
Reporting provides the pseudo-binary data compression format, which
is commonly used in the GOES applications. The pseudo-binary
compression uses the following algorithm:
- Each data value is compressed into a string of one or several 8-bit
printable ASCII characters.
- Each 8-bit character includes 6 data bits. The two most significant
bits are set to 00 if all six data bits are set; otherwise, they are set
to 01. The six least significant bits include the data.
- The first character in the string includes the 6 most significant data
bits and the last character includes the 6 least significant bits.
- Negative values are represented in 2's complement notation.
The user interface for configuring this function is mostly analogous to
other formatting options. The Report formatting field is available only
on the Advanced user level.
The difference to the configuration of other compression formats is that
Pre-conversion offset is replaced with the Signed value option. This
setting must be selected when the reported value may have negative
values, and must be left unselected when the value always remains
positive. Refer to
Figure 76 on page 168 .