User Manual 3153
Using The Instrument 3-32
To partition the memory from the beginning, use the following command:
TRACe:DELete: ALL
CAUTION
This command will destroy waveforms that were previously
loaded into memory. After using this command, waveform
segments will line-up from address 0 upwards.
Loading Arbitrary
Waveforms
There are three ways to load waveforms into the 3153; 1) Using a
graphical user interface, i.e., WaveCAD, 2) LabWindows/ CVI or
LabVIEW driver, or 3) Low-level programming. When using WaveCAD,
disregard most of this chapter as WaveCAD does the work for you. If
you write your own application or instrument driver, use the following
commands to load data into a specific memory segment.
First, define the work area. Define the segment number and its
associated length. The segment length must be divisible by four or an
error will occur. For example, to use segment number 8 with a waveform
length of 1048 points use this command:
TRACe:DEFine 8,1048
Next, make segment 8 the active segment. The active segment must be
selected because as waveforms are loaded, the Model 3153 must be
notified as to where to place the data it receives. Select the active
segment using the following command:
TRACe:SELect 8
The next step is to transfer data to the active segment. Data can be
loaded into the Model 3153 using a high-speed binary word serial
transfer mode. A special command is defined by IEEE-STD-488.2 for
this purpose. High-speed binary transfer allows any 8-bit bytes
(including extended ASCII code) to be transmitted in a message. This
command is particularly useful for sending small quantities of data.
Faster data transfer rates are available using shared memory,
discussed below.
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