Agilent Technologies E5100A, Programming Manual, Page: 55 / 373

Figure 3-5. IEEE 32-bit oating point format
MS-DOS
R
F ormat
This mode is a modication of the IEEE 32-bit oating point format with the byte order
reversed. The MS-DOS format also has a four-byte header that must be read to maintain the
data order . In this mode , a PC can store the data internally without reformatting it.
Data Header
As shown in Figure 3-4 and Figure 3-5, the data header always precedes the data itself in
binary format transfer . When you use a binary transfer , you must handle the data header with
the data body .
When you query data in binary format, the analyzer outputs a xed length (8 byte) data
header . Y ou can handle the data header as 8-byte strings for this purpose .
When you send the data to data array using binary transfer , you must prepare the data header
for the data you send. The data header indicates the size of the transferred data. The data
header consists of the following three parts: sharp (#), Number of bytes of \Data Size", and
data size .
Figure 3-6. Binary Data Header
F or example , the data size of 201 points of complex data in the 64-bit format is 3216 byte
(=2012228). The \3216" is 4 digit (4 byte) number . Thus , the data header is \#43216". The
queried data header that is generated from the analyzer is a xed length header of 8 bytes that
is obtained by adding \0" before \Data Size". F or example , the data header above becomes
\#6003216" as an 8-byte string. Y ou can use either type of header to send data to the array .
Data Processing and T ransfer 3-9