Tegam 2411B, Operation Manual

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Chapter 8 Advanced Remote Operation
Waveform Memory Format - Binary Waveform Download
Binary Waveform Download
The 2411B also supports binary format for waveform <data> items. Binary format is the fastest way to
transfer data.
<command header> <start address>,<binary data><\n>
The <command header> and <start address> are the same as above. The <binary data> has the following
format:
<#xnum><length><hi bytexlo byte>[<hixlo>...]<\n>
Where:
<#> is the pound sign, ASCII(35).
<num> is the number of digits in the length parameter. 1 to 9.
<length> is the length in bytes (two bytes per waveform data point).
<hi byte> contains the upper eight bits of a waveform data point.
<lo byte> contains the lower eight bits of a waveform data point.
<\n> is the new-line character, ASCII(10).
NOTE:
1.The range of a waveform data point is 0 to 65535. IftheAMPL (Amplitude) parameter is set to 10V,
the following waveform data point values: 0, 32768, and 65535, produce -10 Volts, 0 Volts, and 10
Volts, respectively, on the output. The waveform data point is converted to <hi byte><lo byte> format
for binary downloading. Conversion from waveform data point to <hi byte><lo byte> can be accom-
plished as follows:
QuickBASIC
high_byte = FIX( pointdata / 256)
low_byte = pointdata MOD 256
C
high_byte = pointdata / 256
low_byte = pointdata % 256
Where point data is between 0 and 65535.
2. Since two bytes are required for each waveform data point, the length of bytes sent must always be
even.
3. An example of downloading binary data is included in a Quick Basic program on page 8-25.
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