By 1985 and under the newly formed Trakker, Inc. unit of United Video Satellite Group, two versions of the EPG were offered: EPG Jr., a 16KB EPROM version which ran on various Atari models including the 130XE and 600XL, and EPG Sr., a 3½ bootable diskette version for the Amiga 1000. Raw program listings data for national cable networks, as well as for regional and local broadcast stations, were fed en masse from a mainframe based in Tulsa, Oklahoma to each EPG installation via a 2400 baud data stream on an audio subcarrier of WGN by United Video (which was also the satellite distributor of the WGN national superstation feed). On some installations of the EPG, a flashing dot next to the on-screen clock would indicate proper reception of this data. By cherry-picking data from this master feed for only the networks that its cable system actually carried, each EPG installation was able to generate a continuous visual display of program listings customized to its local cable system's unique channel lineup (data describing the unique channel lineup each EPG was to display also arrived via this master feed).
ClearStream's final entry is the 4MAX, which is an improvement on the 4V when it comes to range and general setup. Quality-wise, this offers what you'd expect from the previous ClearStream antennas with a 70- mile range and 4K capability. That said, the 4MAX is able to bump up the range a bit in the right conditions. And it does use a more streamlined design over the 4V, making the overall setup much easier and saving a bit of space.
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