8 General Programming
274 M8190A User’s Guide
8.22.4 Waveform Data Format in Direct Mode
DAC values have 14 bit resolution in precision mode and 12 bit in speed mode. DAC
values are signed. Valid range is -8192 to +8191 in precision mode and -2048 to
2047 in speed 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 speed 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.
Only the sync marker bit in the first sample of each memory vector is used. Sync
marker bits in the other samples are ignored.
Dac Value binary format in precision mode:
Dac Value binary format in speed mode:
8.22.5 Waveform Data Format in Interpolated Mode
I and Q values have 15 bit resolution in interpolated mode. I and Q values are signed.
Valid range is -16384 to +16383.
Marker position data consists of one bit for a sample marker (SMPM) and one bit for
a sync marker (SYNM) for each I/Q sample pair. The 24 I and Q samples are stored
interlaced. The marker position data is stored together with I and Q values in two 16-
bit signed integers.
Only the sync marker bit in the first sample of each memory vector is used. Sync
marker bits in the other samples are ignored.
The same data format can be used for all four interpolated modes (x3, x12, x24 and
x48).
I/Q value binary format in interpolated mode:
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