Differences between A121 and A111

Differences between A121 and A111#

Here are some of the main differences, additions, and highlights with A121 compared to A111:

  • The four services available for the A111 – power bins, envelope, IQ, and sparse – are all superseded by the sparse IQ service. This new service combines the individual strengths of all A111 services into one, without any sacrifices or compromises.

  • Range is now set in a discrete “point” scale instead of meters, which allows full control over the measured range. The range is no longer limited to 60 mm intervals.

  • In the new range scale, the downsampling factor of A111 is replaced by step length. This also brings a much wider range of settings, starting at 2.5 mm.

  • Any number of sweeps may be measured per frame, only limited by buffer size.

  • The sensor buffer now holds 4095 complex points.

  • The floating point gain scale is replaced by a much wider integer scale, allowing for more precise control and removing the need for maximize signal attenuation.

  • Power save mode is replaced by inter sweep/frame idle states, meaning it’s now possible to set the idle state between sweeps as well as between frames.

  • MUR is replaced by PRF with similar behavior but a wider range of settings.

  • The repetition mode is simplified to a frame rate setting. If set, it corresponds to using the streaming mode. If not set, it corresponds to using the on demand mode.

  • The get next function is split up into four functions for more flexible control over the measurement execution flow – measure, wait for interrupt, read, and execute processing. This also removes the need for the asynchronous measurement setting.

  • The sensor can now be fully reconfigured on the fly via the prepare function, which loads a (new) configuration onto the sensor.

  • The sweep can now be split up into subsweeps with different configurations, for example allowing you to use different profiles across the range.