Publication No. 980935 Rev. A
3152B User Manual
EADS North America Test and Services
Operation 3-23
•
Waveform interlace is changed to 2 (waveform size must divide
by 2)
•
Vertical resolution of arbitrary waveforms is 12 bits (3152B has
16-bit resolution).
The 3152B has Legacy Compatibility mode enabled by default. For
Models 3100M and 3100R, Legacy Compatibility mode is disabled
by default (the full 3152B specifications apply).
For any of the above products, you may enable or disable Legacy
Compatibility mode by using the following commands:
form:inst leg
Enables Legacy Compatibility mode by
downgrading specific specifications to
approximate those of Model 3152A.
form:inst mod
Disables Legacy Compatibility mode. The full
3152B performance specifications apply.
Changing the
Sample Clock
Frequency
Users should be careful not to confuse waveform frequency with
sample clock frequency. For the 3152B, the term “waveform
frequency” is valid for standard waveforms only, and controls the
waveform frequency at the output connector. Waveform frequency
is measured in units of Hertz (Hz).
On the other hand, the term “sample clock frequency” is associated
with arbitrary and sequenced waveforms only, and defines the
frequency at which the clock generator accesses the waveform
sample points. Sample clock frequency is measured in units of
samples per second (S/s).
The following equation computes the frequency of an arbitrary
waveform at the output connector:
Frequency = (Sample Clock Freq.) / (Number of Data Points)
For example, using a sample clock frequency of 80 MS/s with a
1,000-point waveform will generate an 80kHz waveform at the
output connector.
The following command sets the sample clock frequency for
arbitrary and sequenced waveforms:
freq:rast <value>
Set sample clock frequency in units of
samples per second
Sampling clock frequency can be in the range of 100 mS/s to
300 MS/s.
The number of points in the waveform must be an integer multiple
of four. For example, you may use a waveform length of 25,804
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