Differences between A121 and A111

If you’re new to Acconeer products and haven’t used the A111 before, skip this section.

Here are some of the main differences, additions, and highlights coming from 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• The four services available for the A111 – power bins, envelope, IQ, and sparse – are all superseded by the sparse IQ service.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.