DX Engineering DXE-RFS-SYS-2P Manual Download Page 1

Page: 1 / 24

Receive Four Square System

DXE-RFS-SYS-2P

U.S. Patent No. 7,423,588

DXE-RFS-SYS-2P-INS Revision 2a

1200 Southeast Ave. - Tallmadge, OH 44278 USA

Phone: (800) 777-0703 ∙ Tech Support and International: (330) 572-3200

Fax: (330) 572-3279 ∙ E-mail:

Summary of Contents for DXE-RFS-SYS-2P

Page 1: ...2P U S Patent No 7 423 588 DXE RFS SYS 2P INS Revision 2a DX Engineering 2017 1200 Southeast Ave Tallmadge OH 44278 USA Phone 800 777 0703 Tech Support and International 330 572 3200 Fax 330 572 3279...

Page 2: ...is that noise and undesirable signals are greatly reduced for a superior front to rear ratio F R Better control of phase and currents provides a cleaner pattern than found on available transmit four s...

Page 3: ...active element delay lines and the distance to the operating position You must use 75 coax with a known velocity factor VF for all connections We recommend using a high quality 75 flooded F6 type coax...

Page 4: ...parent as reduced front to rear directivity in one or more directions or a higher noise level Site Selection Site selection is important The DXE RFS SYS 2P system can be positioned as close as 1 10 wa...

Page 5: ...sonably similar elevations It s recommended the ground height difference between any element in the array be less than 10 of the array diameter For example a 70 foot diameter array should be within si...

Page 6: ...Receive Antenna Active Vertical w Relay works well with just a single copper ground rod placed as close as possible to the mounting pipe The mounting pipe can be used as the system ground if the pipe...

Page 7: ...ur square array antenna elements should be arranged in a square with the side lengths equal to 1 4 wavelength of the target frequency for optimal results The diagonal corners of the square should poin...

Page 8: ...s the AVA2 to ground the vertical element Installation The DXE RFS 3 Control Unit can be mounted to a galvanized pipe driven into the ground The DXE RFS 3 unit has been pre drilled to accommodate up t...

Page 9: ...gineering offers an inexpensive preparation tool part number DXE CPT 659 that readies the coax for connectors in one operation and comes with an extra cutting cartridge To ensure weather tight connect...

Page 10: ...160m 1 8 MHz 190 9 181 4 154 2 98 160m 80m 138 6 131 7 111 9 70 80m 3 6 MHz 99 0 94 0 79 9 35 40m 7 2 MHz 49 5 47 40 Table 2 Examples of DLY3 Required Length After calculating the required electrical...

Page 11: ...ty factor and type Note the orientation and numbering of the elements by using Figure 2 Be sure the appropriate antenna element is connected to the proper ANT connector on the phasing unit The default...

Page 12: ...o ensure you supply the proper control levels needed Approximate BCD Control Line Lengths Minimum Copper Wire Gage AWG Length 24 1 000 feet 22 1 500 feet 20 2 000 feet Active antenna circuitry needs a...

Page 13: ...t any one time Minimum Copper Wire Gage AWG Length 18 300 Feet 16 500 feet 12 1 200 feet 10 2 000 feet DXE RFS SYS 2P Connection Diagram Shown with optional DXE RFCC 1 Feedline Current Choke DXE RPA 1...

Page 14: ...shown on the previous page Figure 5 Jumper Locations showing Default Settings JMP1 Selects Power Voltage Source Coax or J12 Shown in default position voltage from J12 JMP2 Selects Direction Voltage So...

Page 15: ...to be adjusted to compensate for inaccurate delay line lengths To adjust the null depth tune to a strong steady signal off the back of the antenna s selected direction and adjust R4 and R8 for the de...

Page 16: ...ar signals that are impossible to copy on much noisier transmit antennas for greatly improved weak signal DX operations Receive Four Square Troubleshooting Much of this information is related to activ...

Page 17: ...s on the units and the urine will corrode and damage electronics Insects getting inside units and shorting out electronics A Broken and or shorted conductors due to animal weather or other damage incl...

Page 18: ...as if they were trees The above items are the most common failure points in the system that need to be checked If necessary the following further troubleshooting procedure may assist in finding the m...

Page 19: ...of RFS unit operation Simultaneously feed normal operating voltage on the tested conductor that powers the Active Verticals for reception If a low value fuse blows then a short circuit may be isolate...

Page 20: ...or replaced New DXE AVA 2 units are available separately by calling DX Engineering 10 If all Active Verticals tested provide the same signal level then change switching voltages to activate the other...

Page 21: ...mperature range of Jet Lube SS 30 prevents long term drying and caking and allows easy disassembly and effortless cleaning of parts An environmentally preferred thread lubricant and conductive termina...

Page 22: ...a rotators Sold by the foot order the length you need DXE ARAV3 4P Receive Antenna Active Vertical w Relay Pkg of 4 The DXE ARAV3 4P Active Receive Antenna array package contains 4 of the DXE ARAV3 1P...

Page 23: ...and permit operation in closer proximity to transmit antennas DXE RFCC 1 Receive Feedline Current Choke 50 to 75 300 kHz to 30 MHz If you wish to reduce feedline radiation and improve reception a Fee...

Page 24: ...allation damaged from severe weather including floods or abnormal environmental conditions such as prolonged exposure to corrosives or power surges or by the performance of repairs or alterations outs...