StreamPro ADCP Operation Manual - global site

StreamPro ADCP Operation ManualHeader information is the first item sent by the ADCP to the output buffer.The StreamPro always sends the Least Significant Byte (LSB) first.Table 9:Hex DigitBinaryByteHeader Data FormatFieldDescription1,2 1 HDR ID /Header IDStores the header identification byte (7Fh).3,4 2 HDR ID / DataSource ID5-8 3,4 Bytes / Numberof bytes inensemble9,10 5 Spare Undefined.11,12 6 No. DT / Numberof DataTypes13-16 7,8 Address Offsetfor Data Type#1 / Offset forData Type #117-20 9,10 Address Offsetfor Data Type#2 / Offset forData Type #221-24thru2n+13 to2n+1611,12thru2n+5,2n+6Address Offsetsfor DataTypes #3-n /Offset for DataType #3through #nStores the data source identification byte (7Fh for the Stream-Pro).This field contains the number of bytes from the start of thecurrent ensemble up to, but not including, the 2-byte checksum(Figure 32, page 82).This field contains the number of data types selected for collection.By default, fixed/variable leader, velocity, correlationmagnitude, echo intensity, and percent good are selected forcollection. This field will therefore have a value of six (4 datatypes + 2 for the Fixed/Variable Leader data).This field contains the internal memory address offset wherethe StreamPro will store information for data type #1 (with thisfirmware, always the Fixed Leader). Adding “1” to this offsetnumber gives the absolute Binary Byte number in the ensemblewhere Data Type #1 begins (the first byte of the ensemble isBinary Byte #1).This field contains the internal memory address offset wherethe StreamPro will store information for data type #2 (with thisfirmware, always the Variable Leader). Adding “1” to this offsetnumber gives the absolute Binary Byte number in the ensemblewhere Data Type #2 begins (the first byte of the ensemble isBinary Byte #1).These fields contain internal memory address offset where theStreamPro will store information for data type #3 through datatype #n. Adding “1” to this offset number gives the absoluteBinary Byte number in the ensemble where Data Types #3-nbegin (first byte of ensemble is Binary Byte) #1).P/N 95B-6003-00 (February 2008) page 59