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Update README.md for using Adalm Pluto

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Mario Haustein 2020-05-21 22:53:10 +02:00
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@ -61,4 +61,16 @@ With a HackRF:
Here we use the **HackRF** receiver with `hackrf_transfer` with a lna gain of 24dB (`-l 24`), an IF gain of 32dB (`-g 32`), a center frequency of 97.4MHz (`-f 97400000`, in Hz) and a samplerate of 8MS/s (`-s 8000000`, in S/s). The output file is given as stdout (`-r -`). Again the same frequency and samplerate are given to `rffft` and as `hackrf_transfer` also outputs 8 bit data `-F char` is also required for `rffft`.
With a Adalm Pluto:
iio_attr -u usb:x.y.z -c ad9361-phy RX_LO frequency 97400000
iio_attr -u usb:x.y.z -c ad9361-phy voltage0 rf_port_select A_BALANCED
iio_attr -u usb:x.y.z -c ad9361-phy voltage0 rf_bandwidth 2000000
iio_attr -u usb:x.y.z -c ad9361-phy voltage0 sampling_frequency 2000000
iio_attr -u usb:x.y.z -c ad9361-phy voltage0 gain_control_mode manual
iio_attr -u usb:x.y.z -c ad9361-phy voltage0 hardwaregain 60
iio_readdev -u usb:x.y.z -b 4194304 cf-ad9361-lpc | ./rffft -f 97400000 -s 2000000 -F int
Here we use the **Adalm Pluto** transceiver with `iio_readdev`. The transceiver is connected via USB. Replace `x.y.z` by the USB bus ID of your transceiver. You can retreive the USB IDs from the output of `iio_info -s`. Connection via Ethernet is possible as well. Before receiving we have to set center frequency, samplerate, gain, ... by a bunch of `iio_attr` commands.
The output spectrograms can be viewed and analysed using `rfplot`.