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Format for Data
Transfer
BYTE Format
2 6 4
ere are three formats for transferring waveform data over the remote
interface. The formats are WORD, BYTE, and ASCII.
WORD and BYTE formatted waveform records are transmitted using the
arbitrary block program data format specified in IEEE-488.2. When you
use this format, the ASCII character string "#8-z DDDDDDDD > " is sent
before the actual data. Each D represents an ASCII digit. The eight-digit
number represents the number of bytes to follow.
For example, if 2048 points of data are to be transmitted, the ASCII string
In BYTE format, the six least significant bits represent the waveform data.
This means that the display is divided into 64 vertical increments. The
most significant bit is not used. The second most significant bit is the
overflow bit. If this bit is set to "1" and all data bits are set to "0" then the
waveform is clipped at the top of the screen. If all "0"s are returned, then
the waveform is clipped on the bottom of the display (see figure 26-2).
N O R M A L A N D A V E R A G E ACOUISITION TYPE
128
64
O V E R F L O W
Figure 262. Byte Date Structure
The data returned in BYTE format are the same for either Normal or
Average acquisition
types.
than the other two formats.
32
16
8
4
2
The
transfer rate in this format is faster
data
Progmmming Reference
HP 16528/1653B
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