These exceptions result in the fine channel frequencies of 20kHz and 40kHz Legacy MWA data NOT being the same as 20kHz and 40kHz MWAX data.
Here is a more detailed picture of which ultrafine channels go into which averaged channel. In this example there are 12 channels being averaged by different fscrunch factors. The averaging behavior depends on whether the fscrunch number and the number of averaged channels are odd or even.
This example illustrates why the center frequency of an averaged MWAX channel can be different from that of an averaged channel from the legacy correlator.
The tick marks indicate the center frequencies of each ultrafine channel, with the thick center frequency of the center coarse fine channel shown in bold.
Channels that include power from ultrafine channel zero (the channel which contains power from the high and low edges of the coarse channel) are highlighted in gray.