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LimeSDR: updated documentation

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f4exb 2018-03-14 08:40:05 +01:00
parent 71686e6c45
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9 changed files with 3 additions and 5 deletions

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@ -117,8 +117,6 @@ HackRF is better used with a sampling rate of 4.8 MS/s and above. The 2.4 and 3.
<h2>LimeSDR</h2> <h2>LimeSDR</h2>
<p><b><p>&#9888; Source code only. Due to instability of recent versions of Lime Suite the "official" support cannot be maintained. You can still compile the plugins from source and see for yourself</b></p>
[LimeSDR](https://myriadrf.org/projects/limesdr/) and its smaller clone LimeSDR Mini are supported using LimeSuite library (see next). [LimeSDR](https://myriadrf.org/projects/limesdr/) and its smaller clone LimeSDR Mini are supported using LimeSuite library (see next).
<p><b>&#9888; The plugins should work normally when running as single instances. Support of many Rx and/or Tx instances running concurrently is considered experimental. At least you should always have one of the streams running.</b></p> <p><b>&#9888; The plugins should work normally when running as single instances. Support of many Rx and/or Tx instances running concurrently is considered experimental. At least you should always have one of the streams running.</b></p>

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@ -77,9 +77,9 @@ Use this button to activate/deactivate the TSP NCO. The LMS7002M chip has an ind
Use this push button to reset the NCO frequency to 0 and thus center on the main passband of the DAC. Use this push button to reset the NCO frequency to 0 and thus center on the main passband of the DAC.
<h3>7: Center frequency with NCO engaged</h3> <h3>7: NCO frequency</h3>
This is the center frequency of the mix of LO and NCO combined and is the sink passband center frequency when the NCO is engaged. Use the thumbwheels to adjust frequency as done with the LO (1.1). Pressing shift simultanoeusly moves digit by 5 and pressing control moves it by 2. The boundaries are dynamically calculated from the LO center frequency, sample rate and hardware interpolation factor. This is the NCO frequency. Use the thumbwheels to adjust frequency as done with the LO (1.1). Pressing shift simultanoeusly moves digit by 5 and pressing control moves it by 2. The boundaries are dynamically calculated from the LO center frequency, sample rate and hardware interpolation factor.
&#9758; In the LMS7002M TSP block the NCO sits after the interpolator (see Fig.14 of the [datasheet](http://www.limemicro.com/wp-content/uploads/2015/09/LMS7002M-Data-Sheet-v2.8.0.pdf) p.7) so it runs at the actual DAC rate. Hence the NCO limits are calculated as +/- half the device to host sample rate multiplied by the hardware interpolation factor. For example with a 4 MS/s device to host sample rate (10) and a hadrware interpolation of 16 (8) you have +/- 32 MHz span around the LO for the NCO. In this example you can tune all HF frequencies with the center frequency set at its lowest (30 MHz). &#9758; In the LMS7002M TSP block the NCO sits after the interpolator (see Fig.14 of the [datasheet](http://www.limemicro.com/wp-content/uploads/2015/09/LMS7002M-Data-Sheet-v2.8.0.pdf) p.7) so it runs at the actual DAC rate. Hence the NCO limits are calculated as +/- half the device to host sample rate multiplied by the hardware interpolation factor. For example with a 4 MS/s device to host sample rate (10) and a hadrware interpolation of 16 (8) you have +/- 32 MHz span around the LO for the NCO. In this example you can tune all HF frequencies with the center frequency set at its lowest (30 MHz).

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@ -83,7 +83,7 @@ USe this push button to reset the NCO frequency to 0 and thus center on the main
<h4>2.3: Center frequency with NCO engaged</h4> <h4>2.3: Center frequency with NCO engaged</h4>
This is the center frequency of the mix of LO and NCO combined and is the source passband center frequency when the NCO is engaged. Use the thumbwheels to adjust frequency as done with the LO (1.1). Pressing shift simultanoeusly moves digit by 5 and pressing control moves it by 2. The boundaries are dynamically calculated from the LO center frequency, sample rate and hardware decimation factor. This is the NCO frequency. Use the thumbwheels to adjust frequency as done with the LO (1.1). Pressing shift simultanoeusly moves digit by 5 and pressing control moves it by 2. The boundaries are dynamically calculated from the LO center frequency, sample rate and hardware decimation factor.
&#9758; In the LMS7002M TSP block the NCO sits before the decimator (see Fig.14 of the [datasheet](http://www.limemicro.com/wp-content/uploads/2015/09/LMS7002M-Data-Sheet-v2.8.0.pdf) p.7) so it runs at the actual ADC rate. Hence the NCO limits are calculated as +/- half the device to host sample rate multiplied by the hardware decimation factor. For example with a 4 MS/s device to host sample rate (5) and a hadrware decimation of 16 (3) you have +/- 32 MHz span around the LO for the NCO. In this example you can tune all HF frequencies with the center frequency set at its lowest (30 MHz). &#9758; In the LMS7002M TSP block the NCO sits before the decimator (see Fig.14 of the [datasheet](http://www.limemicro.com/wp-content/uploads/2015/09/LMS7002M-Data-Sheet-v2.8.0.pdf) p.7) so it runs at the actual ADC rate. Hence the NCO limits are calculated as +/- half the device to host sample rate multiplied by the hardware decimation factor. For example with a 4 MS/s device to host sample rate (5) and a hadrware decimation of 16 (3) you have +/- 32 MHz span around the LO for the NCO. In this example you can tune all HF frequencies with the center frequency set at its lowest (30 MHz).