The topic today is about E4000 USB DVB-T stick, which is said to be a useful and practical equipment in daily life. This stick supports DVB-T digital TV, live SDTV and HDTV, digital radio and still image snapshot, extremely functional and practical for use. With infrared remote control, this stick is much convenient to use. To know more details about this stick, you can continue reading.
Sticks with this combination of RTL2832 and R820T are relatively new on the market. The main difference to all the other supported tuners so far is that it uses a Low-IF 3.57MHz architecture instead of Zero-IF. That means the tuner is only connected to the In-Phase ADC input, and the internal down converter of the RTL2832 is generating the complex samples. This has the benefit of having no DC offset spike in the middle of the spectrum. So far the tuner driver comes straight from the kernel driver that Realtek supplies, and setting gain manually is not supported yet, although functions for that seem to exist. There is still is a lot that needs to be done. The best thing most likely would be to completely rewrite the driver, or at least clean it up dramatically. Initializing the tuner takes way too long at the moment, since the driver produces a lot of I2C traffic, most of it being redundant as it seems.
The driver showed that the PLL of this stick can achieve lock up to 1766MHz, and indeed both ADS-B at 1090MHz and L-Band DAB at 1463MHz, as well as GMR at 1556MHz can be received just fine with the R820T. Also, the PLL could lock again at 1850MHz to 1860MHz, and the reception of a GSM 1800 BTS at 1854MHz worked as well.
Given that the supply of E4000 based sticks is dwindling, this item is new tuner that has the potential of becoming a good replacement, and staying for a while on the market.
All in all, this E4000 USB DVB-T stick is a useful, practical and multifunctional equipment for people to have. Getting one stick, you can have a great fun in everyday life.