Keysight M8121A User Manual page 119

15 14 13 12
DB13 DB12 DB11 DB10
15 14 13 12
DB11 DB10 DB9 DB8
Keysight M8121A Arbitrary Waveform Generator User Guide
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 14-bit mode:
11 10 9 8
DB9 DB8 DB7 DB6
DAC Value binary format in 12-bit mode:
11 10 9 8
DB7 DB6 DB5 DB4
The 12-bit packed format is useful to mimic the data format needed when
sending data over the ODI to the M8121A in 12-bit mode. The packing is
required in order to fit within the data bandwidth of the ODI. When using
the 12-bit packed format, there are no marker bits.
DAC Value binary format in 12-bit packed mode:
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:
7 6 5 4
DB5 DB4 DB3 DB2
7 6 5 4
DB3 DB2 DB1 DB0
Remote Programming
3 2 1 0
DB1 DB0 SYNM SMPM
3 2 1 0
X X SYNM SMPM
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