Keysight M8121A User Manual page 118

6 Remote Programming
118
Table 8
Waveform output mode and packing
12-bit, stored in 16-bit words
14-bit, stored in 16-bit words
12-bit stored in 12-bit "packed" words
xN interpolation
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 output mode
12-bit, stored in 16-bit words
14-bit, stored in 16-bit words
12-bit stored in 12-bit "packed" words
xN interpolation
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 Memory Capacity
Waveform Granularity and Size
Keysight M8121A Arbitrary Waveform Generator User Guide
Number of Samples
524,160
524,160
523,776
262,144
Memory vector size in samples
192
320
768
64