Keysight M8121A, User Manual

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118 Keysight M8121A Arbitrary Waveform Generator User Guide
6 Remote Programming
Table 8 Waveform Memory Capacity
Waveform Granularity and Size
The waveform memory is internally organized in fixed size memory vectors.
Their size depends on the selected waveform output mode. The waveform
length must be multiples of the memory vector size. The maximum
segment size is only limited by the size of the available memory.
Table 9 Waveform Granularity and Size
Waveform Data Format in Direct Mode
DAC values have 14 or 12 bit resolution. DAC values are signed. Valid
range is -8192 to +8191 in 14-bit mode and -2048 to 2047 in 12-bit mode.
Marker position data consists of two bits, one bit for sample markers
(SMPM) and one bit for sync markers (SYNM). The marker position data is
stored together with the DAC values in a 16-bit signed integer. The DAC
values occupy the most significant bits and the marker data the least
significant bits. In 12-bit mode bits 2 and 3 are don’t-care. The same data
format can be used for both modes. In speed mode the two least
significant bits are simply ignored.
Waveform output mode and packing Number of Samples
12-bit, stored in 16-bit words 524,160
14-bit, stored in 16-bit words 524,160
12-bit stored in 12-bit “packed” words 523,776
xN interpolation 262,144
Waveform output mode Memory vector size in samples
12-bit, stored in 16-bit words 192
14-bit, stored in 16-bit words 320
12-bit stored in 12-bit “packed” words 768
xN interpolation 64