3152B User Manual
Publication No. 980935 Rev. A
3-22
Operation
EADS North America Test and Services
Use the following command to select an active segment:
trac:sel <n>
Selects the active segment <n>.
Waveform data is downloaded only to
this active segment. If you plan to
partition the entire table with the
“segm
<array>” command, select
segment #1 as the active segment.
The next step transfers waveform data to the active segment. Use
the following command:
trac# <data_array>
Downloads waveform sample data to
the active segment. If you condensed
all waveforms to a single waveform,
then you may use the “segm <array>”
command to partition the memory into
segments in one operation. See
Chapter 5 for information on preparing
and downloading waveform sample
data.
Selecting 12-bit or
16-bit Waveform
Resolution
The 3152B handles waveform data in 16-bit words. In most cases
this high resolution is an advantage because it minimizes
quantization noise and enhances signal integrity. However, some
applications, such as those using the older 3152A instrument, use
only 12-bit data. For compatibility, The 3152B automatically
converts 12-bit data from legacy applications without the need to re-
write the application program or data files.
The default data resolution for the 3151B and 3152B is 12 bits.
Other configurations, such as 3100M-3152B and 3100R-3152B,
default to 16 bits. Regardless of the model number, you may set the
waveform resolution to either 12 bits or 16 bits using the following
commands:
form:wave:res 12bit
Sets the resolution to 12 bits.
Instructions for preparing the 12-bit
data are given in Chapter 5.
form:wave:res 16bit
Sets the resolution to 16 bits.
Instructions for preparing the 16-bit
data are given in Chapter 5.
Selecting Code
Compatibility with
the Legacy 3152A
For applications written for the legacy 3152A, you may use The
3152B in Legacy Compatibility mode. Legacy Compatibility mode,
when enabled, affects the performance specifications in the
following ways:
•
Maximum sample clock frequency is reduced to 100 MS/s
[3152B can reach 250 MS/s].
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