Data Sheets
M8121A
12 GSa/s Streaming Arbitrary Waveform Generator
M8121A at a glance
Key features
Optical data interface
Two output paths for different applications
M8192A multi-channel synchronization module
Scenario Generator with Infinite Playtime
Conventional AWGs have a certain amount of built-in waveform memory that allows the user to generate pre-calculated waveform segment(s) under the control of a sequencer. But no matter how large the memory of an instrument is, it is a finite resource and eventually a loop will occur. Even the most complex sequencing engine does not eliminate this basic limitation. The M8121A uses a different approach: Instead of a built-in memory, it offers a full rate optical data interface (ODI) to supply the samples to the DAC at up to 12 GSa/s via streaming, which enables infinitely long scenarios to be generated with up to approximately 5 GHz of modulation bandwidth. The figure below shows an overview block diagram on the M8121A.
High resolution, wide bandwidth and streaming combined
The M8121A not only offers a wide bandwidth streaming interface for infinite playtime, but with up to 14 bits of vertical resolution and up to -90 dBc of spur-free dynamic range (SFDR), the M8121A achieves best-in-class signal performance, which is a key requirement in many aerospace defense, wireless and high-end physics applications.
Flexibility
In addition to a “direct mode”, where DAC samples are transmitted over the streaming interface, it is possible to use the built-in “digital up-conversion” functionality.1 In this mode, in-phase and quadrature (I/Q) baseband samples are supplied over the streaming interface. The signal is interpolated to the DAC sample rate, multiplied with the desired carrier frequency before it is sent to the DAC.
The benefits of this mode are:
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