TechniSat AirStar USB / Air2PC DVB USB

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A DVB-T USB device from TechniSat.

The original "Air2PC DVB USB" reference design was created by B2C2 and adopted by TechniSat for manufacturing. As part of TechniSat's DVB PC TV Stars products lineup, the device was given the name "AirStar USB". (TechniSat's PCI based cards have some peculiar naming inconsistencies on the German and English websites -- the cards use a *Star 2 TV PCI nomenclature on the German pages, but strangely, TechniSat has since dropped the "TV" part from the name on its English website for both their AirStar and CableStar PCI cards, yet retains it in their SkyStar PCI card's name. The "*Star" USB devices, for their part, share a consistent naming basis across both websites, whereby both the "2" & "TV" are omitted from the respective USB device name.)

Based on the B2C2 FlexCop chipset, and uses a MT352 demodulator.

The following drivers are needed for this device:

 - mt352.ko
 - b2c2-flexcop.ko
 - b2c2-flexcop-usb.ko

These frontend(s)/demodulator(s) can be found in various revisions of this device:

 - Zarlink MT352
Device / Model Type Hardware Firmware URL / Pictures
Comments & quirks
TechniSat/B2C2 AirStar USB DVB-T USB1.1 / USB2.0 [1]
UPDATE 7 sept 2014: Kernel 3.13.7 (with Skystar S2 patch) finds unit, shows that's not using the CX24120 & CX24123 which is OK because it has Zarlink MT352 Tuner. Unit works OK for me for some time. After some hours it will tune, signal & quality is shown but no more picture. Un/loading modules won't work. Only re-plugin it will.

Not supported? W3ird_N3rd says that "it is detected perfectly but it is not capable of locking onto any channel, 0 channels are found. My antenna is fine and the device does work on Windows, so somehow support for this device is broken. Don't buy it till it's fixed."

UPDATE 13th june 2008: That was probably a year ago. W3ird_N3rd here again, and with v4l-dvb from hg today, it still does the same. When plugging it in I see "CX24123: wrong demod revision: 0" in dmesg, will ask about that on the mailinglist.


b2c2-flexcop: B2C2 FlexcopII/II(b)/III digital TV receiver chip loaded successfully
flexcop_usb: running at FULL speed.
DVB: registering new adapter (FlexCop Digital TV device)
b2c2-flexcop: MAC address = 00:d0:d7:0e:61:fd
waiting module removal not supported: please upgrade
CX24120: cx24120_attach: -> Conexant cx24120/cx24118 - DVBS/S2 Satellite demod/tuner
CX24120: cx24120_attach: -> Driver version: 'SVT - 0.0.4a	03.04.2012'
CX24120: cx24120_attach: ### ERROR: ### Unsupported demod revision: 0x0 detected. Exit.
CX24123: wrong demod revision: 0
b2c2-flexcop: found 'Zarlink MT352 DVB-T' .
usb 1-2: DVB: registering adapter 4 frontend 0 (Zarlink MT352 DVB-T)...
b2c2-flexcop: initialization of 'Air2PC/AirStar 2 DVB-T' at the 'USB' bus controlled by a 'FlexCopIII' complete
flexcop_usb: Technisat/B2C2 FlexCop II/IIb/III Digital TV USB Driver successfully initialized and connected.
usbcore: registered new interface driver b2c2_flexcop_usb

Page Allocation Failure

Some systems see occasional page allocation problems on module reload/init (even on systems with 1GB of ram). The following command may help:

echo 16384 > /proc/sys/vm/min_free_kbytes

Source : ([2],[3])

External Links