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Remote Operation
WDCA Techniques to Improve Throughput
IEEE 64 bit formats. The instrument does not carry more than 32 bits of data
resolution internally, so there is no benefit to doing a 64 bit transfer. To config-
ure for a 32 bit binary transfer:
sendMessage FORMat REAL,32
See "Example 6, Acquire Binary Trace" on page 5-61 for an example of how to
transfer and interpret a binary trace.
The advantage of binary over ASCII can be even greater for automation
projects using Visual Basic and C++. With short binary transfer times, the data
transfer process is faster than the hardware. This makes it possible to devise
ways to process the data faster to keep up with the hardware. Note that in
Visual C++ it is possible to download and convert the trace in one step by
changing the format string.
The following table and chart compare the different times it takes to transfer
trace data. The data was taken using Visual C++ with National Instruments
VISA. Since the data must be converted to be useful, both transfer and conver-
sion times are listed.
5-30
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