On-Air Comparison Test of DX Antennas VHF/UHF DTA-5000 SMART ANTENNA vs 4-Bay & 8-Bay Antennas using Sylvania 6900DTE HD-STB, which is the first implementation of the EIA/CEA-909 SMART ANTENNA Interface. DTA-5000 was about as effective as a 4-Bay but CM-4228 8-Bay was clearly better for UHF, 22-miles away (not quite LOS).
Date(s): 5 Aug 2005. Album by holl_ands. 1 - 20 of 21 Total. 10470 Visits.
enlarge 61KB, 791x1024 1 Test Summary for DX Antennas DTA-5000 Smart Antenna with EIA/CEA-909 Smart Antenna Interface to Sylvania 6900DTE OTA HD-STB.
For VHF, the long elements form a set of crossed dipoles...hence up to 0 dBd Gain.
enlarge 0KB, 1024x518 6 For UHF, parts "1" and "2" form two-element Yagis configured for four compass headings... hence up to 3 dBd Gain.
E.G. Sometimes set with "1" & "2" white labels is a reflector and the "1" & "2" green set is active. For reverse direction, roles are reversed.
enlarge 0KB, 1024x952 7
enlarge 0KB, 1024x536 8 Center element is part of VHF Crossed Dipoles.
Loading Coils make it appear electrically longer.
enlarge 0KB, 1024x530 9 Other part of VHF Crossed Dipoles.
Note yet another Loading Coil.
enlarge 0KB, 1024x397 10 Variable Gain Preamps selectively combine elements to scan 16 compass headings under control of the HD-STB, which determines the "best" settings.
Controller chips are on lower Circuit Board.
enlarge 0KB, 1024x660 11 Variable Gain Preamp Circuit Board Detail
enlarge 0KB, 1024x193 14 Sylvania 6900DTE Rear Panel Smart Antenna Interface connects to a Power Inserion Module inserted on coax between DX-5000 and 6900DTE.
enlarge 0KB, 1024x756 15 DPI-10 Smart Antenna Control Box is inserted on coax between DTA-5000 and Sylvania 6900DTE.
Power Insertion Module for mast-mounted DTA-5000....plus controls.
enlarge 0KB, 696x1024 16 Sylvania 6900DTE Control Box Top View
enlarge 0KB, 682x1024 17 Sylvania 6900DTE Control Box Bottom View
