# KaliPi and R820T SDR - 2018111


## Hardare

* NooElec R820T SDR & DVB-T NESDR Mini


## Install steps

1. Install packages. Execute:

    ```
apt-get -fy install rtl-sdr
    ```
    
2. Connect antenna and plug device into the Pi.
3. Locate connected USB device. Execute

    ```
lsusb
    ```
    
 * result should contain with DVB-T, meaning the OS has recognized the device and loaded the _correct_ drivers:

    ```
Bus 001 Device 009: ID 0bda:2832 Realtek Semiconductor Corp. RTL2832U DVB-T
    ```
 
1. Check loaded DVB devices. Execute:

    ```
lsmod  | grep dvb
    ```
    
 * result

    ```
dvb_usb_rtl28xxu       28672  0
dvb_usb_v2             24576  1 dvb_usb_rtl28xxu
dvb_core              110592  2 dvb_usb_v2,rtl2832
    ```
 
 1. Black default drivers. Execute:

    ```
echo "blacklist dvb_usb_rtl28xxu" >> /etc/modprobe.d/blacklist-dvb.conf
    ```
 
 1. Unplug the usb device.
 2. Plug back in
 3. Run a test. Execute:


    ```
rtl_test
    ```
    
 * result

    ```
Found 1 device(s):
  0:  Generic, RTL2832U, SN: 77771111153705700
Using device 0: Generic RTL2832U
Detached kernel driver
Found Rafael Micro R820T tuner
Supported gain values (29): 0.0 0.9 1.4 2.7 3.7 7.7 8.7 12.5 14.4 15.7 16.6 19.7 20.7 22.9 25.4 28.0 29.7 32.8 33.8 36.4 37.2 38.6 40.2 42.1 43.4 43.9 44.5 48.0 49.6
[R82XX] PLL not locked!
Sampling at 2048000 S/s.
Info: This tool will continuously read from the device, and report if
samples get lost. If you observe no further output, everything is fine.
Reading samples in async mode...
Allocating 15 zero-copy buffers
lost at least 144 bytes
    ```

## scan range

Use rtl_power tp scan	

 
### resources

* [NESDR Installation Manual for Ubuntu - Nooelec](https://www.nooelec.com/store/downloads/dl/file/id/72/product/0/nesdr_installation_manual_for_ubuntu.pdf)
* [RX_TOOLS: RTL-SDR COMMAND LINE TOOLS (RTL_POWER, RTL_FM, RTL_SDR) NOW COMPATIBLE WITH ALMOST ANY SDR](https://www.rtl-sdr.com/rx_tools-rtl-sdr-command-line-tools-rtl_power-rtl_fm-rtl_sdr-now-compatible-with-almost-any-sdr/)