• http://sdr.osmocom.org/trac/wiki/rtl‑sdr 
• http://rtl‑entropy.org/ 

Contents: [Dobrica Pavlinušić's random unstructured stuff]
• Dobrica Pavlinušić's random unstructured stuff (calibration) 
• Dobrica Pavlinušić's random unstructured stuff (DVB‑T Digital TV Receiver USB Dongle w/ FM / Remote Control / Antenna ‑ Black) 
• Dobrica Pavlinušić's random unstructured stuff (E4000+2832U USB DVB‑T TV Receiver Stick) 
• Dobrica Pavlinušić's random unstructured stuff (Hama 53176) 
• Dobrica Pavlinušić's random unstructured stuff (TV LV5TDLX) 

calibration
https://github.com/steve‑m/kalibrate‑rtl 
dpavlin@nuc:/nuc/kalibrate-rtl$ ./src/kal -s GSM900
Found 1 device(s):
  0:  Terratec T Stick PLUS

Using device 0: Terratec T Stick PLUS
Found Elonics E4000 tuner
Exact sample rate is: 270833.002142 Hz
kal: Scanning for GSM-900 base stations.
GSM-900:
        chan: 53 (945.6MHz - 14.311kHz) power: 873627.18
        chan: 61 (947.2MHz - 14.203kHz) power: 5086424.19
        chan: 69 (948.8MHz - 14.217kHz) power: 925674.55
        chan: 82 (951.4MHz - 14.368kHz) power: 1267065.47
        chan: 89 (952.8MHz - 14.430kHz) power: 914349.18
        chan: 99 (954.8MHz - 14.352kHz) power: 902132.81
        chan: 105 (956.0MHz - 14.380kHz)        power: 990434.19
        chan: 108 (956.6MHz - 14.350kHz)        power: 2682914.97

dpavlin@nuc:/nuc/kalibrate-rtl$ ./src/kal -c 61
Found 1 device(s):
  0:  Terratec T Stick PLUS

Using device 0: Terratec T Stick PLUS
Found Elonics E4000 tuner
Exact sample rate is: 270833.002142 Hz
kal: Calculating clock frequency offset.
Using GSM-900 channel 61 (947.2MHz)
average         [min, max]      (range, stddev)
- 14.238kHz             [-14257, -14220]        (37, 8.682419)
overruns: 0
not found: 0
average absolute error: 15.032 ppm

dpavlin@nuc:/nuc/kalibrate-rtl$ ./src/kal -c 61
Found 2 device(s):
  0:  Generic RTL2832U OEM
  1:  Terratec T Stick PLUS

Using device 0: Generic RTL2832U OEM
Found Fitipower FC0012 tuner
Exact sample rate is: 270833.002142 Hz
kal: Calculating clock frequency offset.
Using GSM-900 channel 61 (947.2MHz)
average         [min, max]      (range, stddev)
- 36.021kHz             [-36032, -36011]        (21, 5.899949)
overruns: 0
not found: 0
average absolute error: 38.028 ppm

DVB‑T Digital TV Receiver USB Dongle w/ FM / Remote Control / Antenna ‑ Black
http://dx.com/p/dvb‑t‑digital‑tv‑receiver‑usb‑dongle‑w‑fm‑remote‑control‑antenna‑black‑149928 
dpavlin@blue:~$ lsusb | grep DVB
Bus 001 Device 007: ID 0bda:2838 Realtek Semiconductor Corp. RTL2838 DVB-T

dpavlin@blue:~$ sudo rtl_test -t
[sudo] password for dpavlin: 
Found 1 device(s):
  0:  ezcap USB 2.0 DVB-T/DAB/FM dongle

Using device 0: ezcap USB 2.0 DVB-T/DAB/FM dongle
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 
No E4000 tuner found, aborting.

dpavlin@blue:/blue/rtl-sdr/rtl-sdr/build$ sudo rtl_tcp 
Found 1 device(s).
Found Rafael Micro R820T tuner
Using ezcap USB 2.0 DVB-T/DAB/FM dongle
Tuned to 100000000 Hz.
listening...
Use the device argument 'rtl_tcp=127.0.0.1:1234' in OsmoSDR (gr-osmosdr) source
to receive samples in GRC and control rtl_tcp parameters (frequency, gain, ...).

E4000+2832U USB DVB‑T TV Receiver Stick
http://dx.com/p/e4000‑2832u‑usb‑dvb‑t‑tv‑receiver‑stick‑white‑black‑172105 
dpavlin@blue:~$ rtl_test -t
Found 1 device(s):
  0:  Terratec T Stick PLUS

Using device 0: Terratec T Stick PLUS
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 
Benchmarking E4000 PLL...
[E4K] PLL not locked for 52000000 Hz!
[E4K] PLL not locked for 2227000000 Hz!
[E4K] PLL not locked for 1114000000 Hz!
[E4K] PLL not locked for 1274000000 Hz!
E4K range: 53 to 2226 MHz
E4K L-band gap: 1114 to 1274 MHz

Hama 53176
• FC0013 tuner

TV LV5TDLX
• FC0012 tuner