I have two USB Mobile DTV receivers, a Pixtree PTX-100 and a DTVinteractive Storm, sold in the US under the Colby brand as DTV111. Both included driver and player software and small magnetic base external antennas. The Pixtree antenna is a wire affair about 10 inches high with a small coil wound in the center, reminiscent of early cellphone auto antennas. The Colby antenna is about 7 inches high, tapered plastic, with a flexible tip. Both had about 7 feet of thin coax to the connector.These are the antennas utilized in Korea for vehicular reception of their DBM mobile transmissions.
The antenna connectors are similar, but due to the diameter of the connectors and the size of the ports, they aren't interchangeable.There was one exception though, I was able to connect the Pixtree antenna to the DTV111 and use it for both devices in comparing reception.
The Colby also came with a tiny 2 inch closed, 7 inch open telescoping antenna.
My Pixtree is an early model orange and black unit about 3 inches long and 1 inch wide, large for a USB drive. I was told that the final production units will be smaller, have greater sensitivity and also include a tiny telescoping antenna, but would not ship with the external one. The software was a Alpha build and did little but receive - one channel at a time. I had to rescan for each channel. Time shifting, recording, screen capture, all were non-functioning in my build. The production Pixtree was to go on sale in the us in August. I'm still waiting
The Colby is a production model about 3/4'" wide and just over 2" long. The software is ver. 1, but is fully functional. I did not test the time-shift or screen capture, but I'm confident they work.
I tested both units in both a Hannspree Netbook with 2gig of ram, 1.8Ghz cpu, running Windows XP-Pro, and a VILIV X70 tablet pc with 1 gig of ram, 1.3 Ghz cpu, running XP-Home.. The Viliv is the unit I wanted to use these tuners in.
My home, according to AntennaWeb, is about 24 mils from the DC transmission towers and these are the reception results.
4-1 WRC NBC 4
5-1 WTTG Fox 5
30-1 MHZ 1
30-2 MHZ 7
32-1 WHUT PBS Mobile
32-2 WHUT PBS Kids
The Colby also received two channels of what it indicated as
ATSC Mobile Audio Service
32-3 WAMU 88.5 FM
32-4 WETA 90.9 FM
The audio was an unexpected pleasant surprise.
As expected, the Colby was a bit more sensitive, had quicker channel scan and lock times
Picture quality was good as long as the picture remained small. The Viliv has a 7 inch screen with 1024X600 resolution and when the video went full screen, the softness started to show..On the Hannspree with a 10 inch screen, also at 1024X600, it was definitely lowres. Forget about viewing on a big screen display.. Sound was in stereo
Now for the bad...
The reason I dwell ed so much on the antennas is because without them, there is no reception. The little telescoping antenna was useless- and that is exactly the kind of setup I wanted: something portable and unencumbered. As far as being mobile, I have no doubt that riding around in my truck, with that antenna stuck on the roof, I would get a signal.
In Korea, every device with a screen has the ability to receive DMB just about everywhere. Phones, gps, media players, they all can do it. I was there, I saw it in operation. I didn't expect our system, which really pales in comparison, with only one point of transmission, to match theirs, with thousands of repeaters, but come on, 24 miles and no signal? If this is the way its going to be, it will be a bust.
More Skeptical Then Ever