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ANAN-100D SDR Performance at LF and MF

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Published on Jun 20, 2013

This should be HD 1080p. This video may be deleted and re-uplloaded if it doesn't show up as HD soon. The Flex-5000a although remaining a world class RTX has some limitations. One of those is its performance at LF and MF. With the advent of the 137 kHz and 500 kHz bands, interest in this segment of spectrum is increasing. The new Apache Labs ANAN 100 which is the commercial embodiment of the HPSDR project has a very different architecture to the previous generation of SDR which employed Direct Down Conversion: i.e. the RF was mixed with an oscillator to produce the audio baseband (48/96/192 kHz) for signal processing in the SDR software. The ANAN (Hermes or Angelia RX) uses Digital Down Conversion which samples the RF directly and converts into I/Q for signal processing.

The result is a very usable receiver at LF and MF and makes a welcome addition to SDR for this end of the spectrum. This demo compares the ANAN-100 directly with a Flex-5000 for a reference point. The Flex-5000 is panned hard-left and the ANAN-100 is panned hard right so that the audio can be compared like-for-like - which is not possible in a traditional A/B test where the audio is considered separately.

One antenna is used with a Wilkinson splitter to feed both receivers simultaneously. No other equipment is connected (e.g. external bandpass etc.).

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