Changes between Initial Version and Version 1 of Tutorials/k0SDR/Tutorial11

Timestamp:

Apr 3, 2015, 5:48:12 PM (10 years ago)

Author:

nilanjan

Comment:

—

Tutorials/k0SDR/Tutorial11

@@ +1 @@
+== Realtek 2832 EZCap - A Frugal SDR ==
+
+=== Prereqs ===
+
+=== A cheap spectrum analyzer ===
+The steps below describe how to use a cheap USB TV dongle (RTL2832 EZCap) as a spectrum analyzer. This example uses node20-6.grid.orbit-lab.org since this has an attached RTL2832 device.
+
+*) Load image ''ubuntu-14-04-64bit-sdr.ndz'' on ''node20-6.grid.orbit-lab.org'' then ssh in the node with X11 forwarding enabled. This image should have rtlsdr library already compiled.
+{{{
+grid> omf load -i ubuntu-14-04-64bit-sdr.ndz -t node20-6.grid.orbit-lab.org
+grid> omf tell -a on -t node20-6.grid.orbit-lab.org
+grid> ssh -Y node20-6
+}}}
+
+*) Install dependencies
+{{{
+root@node20-6:~# apt-get install python python-wxgtk2.8 python-matplotlib python-numpy python-imaging git cmake libusb-1.0-0-dev
+}}}
+
+*) Verify RTL2832 device is recognized by the node.
+{{{
+root@node20-6:~/rtl-sdr/src# lsusb | grep Realtek
+Bus 002 Device 003: ID 0bda:2838 Realtek Semiconductor Corp. RTL2838 DVB-T
+}}}
+
+*) Remove default driver for RTL2832.
+{{{
+root@node20-6:~# modprobe -r dvb_usb_rtl28xxu
+}}}
+
+*) Verify RTL library has access to RTL2832
+{{{
+root@node20-6:~# cd ~/rtl-sdr/src
+root@node20-6:~/rtl-sdr/src# ./rtl_test -t
+Found 1 device(s):
+  0:  Realtek, RTL2838UHIDIR, SN: 00000406
+
+Using device 0: Generic RTL2832U OEM
+Found Elonics E4000 tuner
+Supported gain values (14): -1.0 1.5 4.0 6.5 9.0 11.5 14.0 16.5 19.0 21.5 24.0 29.0 34.0 42.0
+Sampling at 2048000 S/s.
+Benchmarking E4000 PLL...
+[E4K] PLL not locked for 52000000 Hz!
+[E4K] PLL not locked for 2234000000 Hz!
+[E4K] PLL not locked for 1117000000 Hz!
+[E4K] PLL not locked for 1249000000 Hz!
+E4K range: 53 to 2233 MHz
+E4K L-band gap: 1117 to 1249 MHz
+}}}
+
+*) Install pyrtlsdr library which provides a Python API for the RTL library
+{{{
+root@node20-6:~# git clone git://github.com/roger-/pyrtlsdr.git
+root@node20-6:~# cd pyrtlsdr
+root@node20-6:~/pyrtlsdr# sudo python setup.py install
+root@node20-6:~/pyrtlsdr# cd ..
+}}}
+
+*) Export Python variable
+{{{
+root@node20-6:~# export PYTHONPATH=$PYTHONPATH:/usr/lib/python2.7/dist-packages
+}}}
+
+*) Install RTLSDR-SCANNER gui
+{{{
+root@node20-6:~# git clone https://github.com/EarToEarOak/RTLSDR-Scanner.git
+root@node20-6:~# cd RTLSDR-Scanner/src/
+root@node20-6:~/RTLSDR-Scanner/src/# ./rtlsdr_scan.py &
+}}}
+
+  || [[Image(random_tx.png, width=500px)]] ||
+
+=== Additional information ===
+For additional details on RTLSDR-SCANNER check http://eartoearoak.com/software/rtlsdr-scanner
+