Digi-tv.ee

Scott kirjutas:Mina näen. Siis kui saatja sabapidi seina panen.

STV näitab ka analoogi. Vist Telset samuti.

RTL-SDR is a very cheap ~$25 USB dongle that can be used as a computer based radio scanner for receiving live radio signals in your area (no internet required). Depending on the particular model it could receive frequencies from 500 kHz up to 1.75 GHz. Most software for the RTL-SDR is also community developed, and provided free of charge.

The origins of RTL-SDR stem from mass produced DVB-T TV tuner dongles that were based on the RTL2832U chipset. With the combined efforts of Antti Palosaari, Eric Fry and Osmocom (in particular Steve Markgraf) it was found that the raw I/Q data on the RTL2832U chipset could be accessed directly, which allowed the DVB-T TV tuner to be converted into a wideband software defined radio via a custom software driver developed by Steve Markgraf. If you've ever enjoyed the RTL-SDR project please consider donating to Osmocom via Open Collective as they are the ones who developed the drivers and brought RTL-SDR to life.

Over the years since its discovery RTL-SDR has become extremely popular and has democratized access to the radio spectrum. Now anyone including hobbyists on a budget can access the radio spectrum. It's worth noting that this sort of SDR capability would have cost hundreds or even thousands of dollars just a few years ago. The RTL-SDR is also sometimes referred to as RTL2832U, DVB-T SDR, DVB-T dongle, RTL dongle, or the "cheap software defined radio".

Analogue TV with RTL-SDR

A user on the SDR# Google Groups forum has posted a program based on ADSB# called TVSharp, which can be used to watch analogue PAL and NTSC TV using the rtl-sdr dongle. Download TVSharp directly here (Mirror 1) (Old Version Mirror 2 (with source)).

The rtl-sdr as a software defined radio actually does not have enough bandwidth to receive a PAL or NTSC signal properly. PAL and NTSC signals require more than double the 2MHz typical bandwidth of the rtl-sdr. But, a decent black and white signal can still be obtained by using some of the luminance part of the signal. As only part of the signal is sampled, resolution will be lost. Also, as sound is broadcast on a separate frequency, a second rtl-sdr dongle will be required to receive the matching audio.

On YouTube, users Superphish and ek6rc have posted videos showing TVSharp in action.

peeter3000 kirjutas:ei tea praegu, üleeile vaatasin..
vb starmani kaablist tuleb

edit
kui rait tahab "analoogindusega" tegeleda, ostku odav usb pulk ja tõmmaku airspy

sdr https://airspy.com/download/

USB pulk= RTL-SDR R820T2 RTL2832U TCXO Software Defined Radio
või E4000 või FC0012/13 (?)

Scott kirjutas:Starmani kaablimodemi upstream-kanalid. Kui teed uut skänni, siis tõmba modem vooluvõrgust välja, ei tohiks rohkem näidata.

peeter3000 kirjutas:airspy näitab korralikku signaali E3 peal