DVB-T

From regional-training

TV

Digital TV standards

Information

  • Specifications
DVB-T DVB-T2
Input device Interface Single Transport Stream (TS) Multiple Transport Stream (MTS) and Generic Stream Encapsulation (GSE)
Modes Constant Coding & Modulation publisher=DVB consortium|date=February 2011}}</ref>
Forward Error Correction (FEC)
1/2, 2/3, 3/4, 5/6, 7/8
Low-density parity-check code(LDPC) + BCH code
1/2, 3/5, 2/3, 3/4, 4/5, 5/6, 6/7, 8/9
Orthogonal frequency-division multiplexing (OFDM) OFDM
Modulation Schemes QPSK, 16QAM, 64QAM QPSK, 16QAM, 64QAM, 256QAM
1/4, 1/8, 1/16, 1/32 1/4, 19/128, 1/8, 19/256, 1/16, 1/32, 1/128
Discrete Fourier transform (DFT) size 2k, 8k 1k, 2k, 4k, 8k, 16k, 32k
Scattered pilot signals 8% of total 1%, 2%, 4%, 8% of total
Continual Pilots 2.6% of total 0.35% of total
Physical Layer Pipes no yes

For instance, a UK MFN DVB-T profile (64-QAM, 8k mode, coding rate 2/3, guard interval 1/32) and a DVB-T2 equivalent (256-QAM, 32k, coding rate 3/5, guard interval 1/128) allows for an increase in bit rate from 24.13 Mbit/s to 35.4 Mbit/s (+46.5%). Another example, for an Italian SFN DVB-T profile (64-QAM, 8k, coding rate 2/3, guard interval 1/4) and a DVB-T2 equivalent (256-QAM, 32k, coding rate 3/5, guard interval 1/16), achieves an increase in bit rate from 19.91 Mbit/s to 33.3 Mbit/s (+67%).

Recommended maximum bit-rate configurations for 8 MHz bandwidth, 32K FFT, guard interval 1/128, pilot pattern 7 * http://tech.ebu.ch/docs/tech/tech3348.pdf title=Frequency and Network Planning Aspects of DVB-T2. Version 2.0

Modu-
lation
Code
rate
Bitrate
(Mbit/s)
Frame
length LF
FEC blocks
per frame
QPSK 1/2 7.4442731 Template:060 Template:050
3/5 8.9457325
2/3 {9.9541201
3/4 11.197922
4/5 11.948651
5/6 12.456553
16-QAM 1/2 15.037432 Template:060 101
3/5 18.07038
2/3 20.107323
3/4 22.619802
4/5 24.136276
5/6 25.162236
64-QAM 1/2 22.481705 Template:060 151
3/5 27.016112
2/3 30.061443
3/4 33.817724
4/5 36.084927
5/6 37.618789
256-QAM 1/2 30.074863 Template:060 202
3/5 36.140759
2/3 40.214645
3/4 45.239604
4/5 48.272552
5/6 50.324472

USB devices

lsusb
Bus 001 Device 017: ID 0bda:2838 Realtek Semiconductor Corp. RTL2838 DVB-T
Compatible devices
VID PID tuner device name
0x0bda 0x2832 all of them Generic RTL2832U (e.g. hama nano)
0x0bda 0x2838 E4000 ezcap USB 2.0 DVB-T/DAB/FM dongle
0x0ccd 0x00a9 FC0012 Terratec Cinergy T Stick Black (rev 1)
0x0ccd 0x00b3 FC0013 Terratec NOXON DAB/DAB+ USB dongle (rev 1)
0x0ccd 0x00d3 E4000 Terratec Cinergy T Stick RC (Rev.3)
0x0ccd 0x00e0 E4000 Terratec NOXON DAB/DAB+ USB dongle (rev 2)
0x185b 0x0620 E4000 Compro Videomate U620F
0x185b 0x0650 E4000 Compro Videomate U650F
0x1f4d 0xb803 FC0012 GTek T803
0x1f4d 0xc803 FC0012 Lifeview LV5TDeluxe
0x1b80 0xd3a4 FC0013 Twintech UT-40
0x1d19 0x1101 FC2580 Dexatek DK DVB-T Dongle (Logilink VG0002A)
0x1d19 0x1102 ? Dexatek DK DVB-T Dongle (MSI DigiVox mini II V3.0)
0x1d19 0x1103 FC2580 Dexatek Technology Ltd. DK 5217 DVB-T Dongle
0x0458 0x707f ? Genius TVGo DVB-T03 USB dongle (Ver. B)
0x1b80 0xd393 FC0012 GIGABYTE GT-U7300
0x1b80 0xd394 ? DIKOM USB-DVBT HD
0x1b80 0xd395 FC0012 Peak 102569AGPK
0x1b80 0xd39d FC0012 SVEON STV20 DVB-T USB & FM

Comparisons with other common Wideband Commercial Software Defined Radios:

SDR Tune Low (MHz) Tune Max (MHz) RX Bandwidth (MHz) ADC Resolution (Bits) Transmit?(Yes/No) Price ($USD)
RTL-SDR (R820T) 24 1766 3.2 / 2.56 Stable 8 No ~20
Funcube Pro+ 0.15 410 260 2050 0.192 16 No ~200
Airspy 24 1800 10 12 No 199
SDRPlay 0.1 2000 8 12 No 149
HackRF 30 6000 20 8 Yes 299
BladeRF 300 3800 40 12 Yes 400 & 650
USRP 1 DC 6000 64 12 Yes 700

references

DVB-T Television and Radio reception

vlc and w_scan

You will need w_scan2 to scan for the new DVB-T2 system channels (which includes the ABC that now uses T2 exclusively):

  • download
git clone https://github.com/stefantalpalaru/w_scan2
  • build
./autoconf.sh
./configure
make
make install\
  • for your convenience I have a Debian tarball of the command
    • you can just extract w_scan2/w_scan2 binary that I compiled for Debian 10 if you do not wish to build again
media:w_scan2.tar
  • make a playlist
w_scan2 -ft -c AU -L > dvbt2.xspf
  • play via vlc
vlc vbt2.xspf

Various channels will appear in the playlist which you can select via View >> Playlist or Ctl L.

old DVB-T only

  • If you are only after simple DVB-T or ASC then
apt install vlc
apt install w-scan
w_scan -ft -c [country_code] -L > dvbt.xspf
vlc dvbt.xspf

Various channels will appear in the playlist which you can select via View >> Playlist or Ctl L.

You may find that some channels are not strong enough to be decoded, thus an external LNA may be required to boost the signals.

references

ADS-B

General RX

This area is to be explored later. With an RTL dongle you can make a spectrum analyser, a radio or TV receiver. Its interesting that these devices were designed for Cable TV and are very prolific. They more than likely could benefit from pre-amplifiers.

I would also be possible to adapt other Software Defined Radio hardware.

linux

windows

NOAA Satellite

Software

See also TX over VGA adaptor https://osmocom.org/projects/osmo-fl2k/wiki

references

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