Specifications
Channel Master Operation Manual
P/N 95B-6001-00 (January 2005) page 79
11 Channel Master PD0 Output Data Format
This section shows the output data format of the Channel Master. Channel Master
output data can be in either hexadecimal-ASCII or binary format. You can select
this option through the CF-command (see the “CF – Flow Control,” page 51). We
explain the output data formats in enough detail to let you create your own data
processing or analysis programs (see “13 How to Decode a Channel Master En-
semble,” page 108).
The following description is for the standard PD0 Channel Master output data
format. Figure 29, page 81 through Figure 37, page 105 shows the ASCII and bi-
nary data formats for the Channel Master PD0 mode. Table 17, page 82 through
Table 28, page 105 defines each field in the output data structure.
After completing a data collection cycle, the Channel Master immediately sends a
data ensemble. The following pages show the types and sequence of data that you
may include in the Channel Master output data ensemble and the number of bytes
required for each data type. The Channel Master sends all the data for a given
type for all range cells and all beams before the next data type begins.
The Channel Master by default is set to collect velocity, correlation data, echo in-
tensity, and percent good data. The data, preceded by ID code 7F7F, contains
header data (explained in Table 17, page 82). The fixed and variable leader data is
preceded by ID codes 0000 and 0080, (explained in Table 18, page 85 and
Table 19, page 90). The Channel Master always collects Header and Leader data.
The table below shows some of the most common IDs.
Table 16: Data ID Codes
ID LSB MSB Description
0x7F7F 7F 7F Header
0x0000 00 00 Fixed Leader
0x0080 80 00 Variable Leader
0x0100 00 01 Velocity Profile Data
0x0200 00 02 Correlation Profile Data
0x0300 00 03 Echo Intensity Profile Data
0x0400 00 04 Percent Good Profile Data
0x0500 00 05 Status Profile Data
0x4000 00 40 Surface Track Status
0x4001 01 40 Surface Track Commands
0x4002 02 40 Surface Track Amplitude
NOTE. The Channel Master always sends the Least Significant Byte
(LSB) first.