The IQ files from the Perseus22 are proprietary, with the extension p22. So you can't read its properties like you can with a wav file. Since I thought the megabytes added up rather fast, I decided to find out exactly how much.
If you record one channel only, the IQ file will increase with roughly 15 MB per second. If however you record two channels (HF1 & 2, or VHF1 & 2), it will double. Which is quite natural. So, we're talking around 30 MB per second, or 108 GB per hour.
Compared to the original Perseus, which also records IQ files off a 2 MSPS range, it only uses around 7.5 MB per second. More exact: 61,000 bps. Now, Perseus recordings are 16-bit, so I'm quite confident that the Perseus22 is using 32-bit recordings.
Now, isn't a 32-bit recording better than a 16-bit? In theory, yes. In real life, no. Several years ago I spent quite a few hours comparing 32-bit recordings from the Winradio G33DDC with Perseus recordings. It was impossible to tell the difference.
It would be nice if Microtelecom/Elad made 16-bit recordings optional in a software update.
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