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Active Receive Antenna
Horizontal Configuration
.
ARAH3-1P - Horizontal Active Antenna
Export Model: ARAH3-1PE
Used under US Patent No. 7,423,588
DXE-ARAH-INS-Revision 3a
© DX Engineering 2012
P.O. Box 1491 ∙ Akron, OH 44309-1491
Phone: (800) 777-0703 ∙ Tech Support and International: (330) 572-3200
Fax: (330) 572-3279 ∙ E-mail: DXEngineering@DXEngineering.com
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Related Manuals for DX Engineering ARAH3-1P
Summary of Contents for DX Engineering ARAH3-1P
- Page 1 Active Receive Antenna Horizontal Configuration ARAH3-1P - Horizontal Active Antenna Export Model: ARAH3-1PE Used under US Patent No. 7,423,588 DXE-ARAH-INS-Revision 3a © DX Engineering 2012 P.O. Box 1491 ∙ Akron, OH 44309-1491 Phone: (800) 777-0703 ∙ Tech Support and International: (330) 572-3200 Fax: (330) 572-3279 ∙...
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Page 2: Table Of Contents
Table of Contents Introduction Location Considerations Warning General Information Features Parts Included with the ARAH System Additional Items Needed, But Not Supplied Technical Description Basic Tools Required Manual Updates and Information Installation Location Active Matching Unit Brass Element Blocks Spacers and Rear Mounting Plate Three Piece 102"... -
Page 3: Introduction
The ARAH series active horizontal antenna system grounds the antenna element when power is turned off. Placing a DXE-ARAH3-1P on the same mast or tower as a Yagi or other transmitting antenna is not recommended for this reason. -
Page 4: Warning
WARNING! INSTALLATION OF ANY ANTENNA NEAR POWER LINES IS DANGEROUS Warning: Do not locate the antenna near overhead power lines or other electric light or power circuits, or where it can come into contact with such circuits. When installing the antenna, take extreme care not to come into contact with such circuits, because they may cause serious injury or death. -
Page 5: Features
Flooded coaxial cable is recommended. CATV F-6 is a high quality 75Ω flooded coaxial cable. Flooded coaxial cables automatically seal small accidental cuts or lacerations of the cable jacket. Flooded cables also prevent shield contamination and can be direct-buried. Contact DX Engineering manufactured with... -
Page 6: Technical Description
Every effort is made to supply the latest manual revision with each product. Occasionally a manual will be updated between the time your DX Engineering product is shipped and when you receive it. Please check the DX Engineering web site (www.dxengineering.com) for the latest revision manual. -
Page 7: Active Matching Unit
If the unit is located 1/10-wavelength to 1/2-wavelength from a transmitting antenna, the unit must be powered off at least 5 ms before transmitting on the transmit antenna. The sequencer such as model DXE-TVSU-1A must be used to ensure the correct transmit-to-receive switching. With this close spacing, coupling from nearby transmit antennas or metal structures becomes more pronounced. -
Page 8: Spacers And Rear Mounting Plate
Spacers and Rear Mounting Plate The rear mounting plate is held to the front mounting plate using spacers to allow room for the Brass Element Blocks. The four polymer spacers are installed using the smaller 1-3/4" bolts and hardware as shown in Figure 3 and 4. Oversize fender washers go under each bolt, and on the opposite side against the polymer mounting plate. -
Page 9: Three Piece 102" Receiving Element - Dxe-Wp-102E
Three Piece 102" Receiving Elements - WP-102E (Export version) The 102" Stainless Steel Tapered Receiving Elements come in two configurations. The ARAH3-1P has the single piece elements and the ARAH3-1PE has the three piece elements. The three piece antenna element was manufactured to take advantage of lower export shipping costs for the antenna elements and to allow DXpeditions to take the three piece whip antennas in normal luggage. -
Page 10: Ground System
Ground System The DX Engineering Horizontal Active Antenna system operates independently from a ground system. However, steps should be taken to properly protect the mounting mechanism, tower, etc from lightning by implementing a proper ground system. -
Page 11: Coaxial Cable Feedline
To help decouple the feedline from radiated noise, bury the feedline for some distance from the antenna when the feedline reaches the ground. A DXE-RFCC-1 DX Engineering Receive Feedline Choke will also ensure feedline decoupling. -
Page 12: Troubleshooting Information
DXE-ARAH3-1P Active Receive Horizontal antenna is probably operating normally. The DXE-ARAH3-1P is designed to be a very low to no gain, low noise system for greatly improved signal-to-noise performance over a very wide range of frequencies. - Page 13 4 radials that are about 15 feet long to the negative terminal ground rod connection on the AVA2. If this significantly increases signal level, then adding another ground rod and/or more radials, as described in the manual for the DXE-ARAH3-1P, should improve your signal results for all bands.
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Page 14: Appendix A -Radio Interface Diagrams
Appendix A - Radio Interface Diagrams The following shows typical interface diagrams for the ARAH3-1P Active Receive Horizontal Antenna System. Every radio manufacturer and every amateur radio operator's location is different. The following is only a suggestion, and you should consult your radio manufacturer's manual for details and further requirements. - Page 15 ARAH system located greater than 1/2-wavelength from any transmitting antenna, connected to a transceiver with a receive input. - 15 -...
- Page 16 ARAH system located between 1/10-wavelength and 1/2-wavelength from the transmitting antenna, connected to a transceiver with a receive input using the DXE-TVSU-1A Time Variable Sequencer Unit for proper switching. - 16 -...
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Page 17: Optional Items
DXE-F6 - 75 Ω F-6 Style, Direct Bury Coaxial Cable: Full Spool or Custom Cable Assemblies DX Engineering recommends using a high quality 75 Ω “flooded” F6 type coaxial cable. Flooded style cables have the distinct advantage of automatically sealing small accidental cuts or lacerations of the jacket. - Page 18 DXE-TVSU-1A - Time Variable Sequencer Unit The DX Engineering TVSU-1A Time Variable Sequencer Unit is a microprocessor-based transmit / receive control-signal delay unit. It provides 0-30 ms of delay, programmable in 2 ms increments, to as many as five outputs tied to the CW keying or push-to-talk (PTT) lines. By controlling the receive-to- transmit (and back) timing of linear amplifiers, preamplifiers, and other sensitive equipment, damage caused by improper switching can be eliminated.
- Page 19 If you wish to reduce feedline radiation and improve reception, a Feedline Current Choke is recommended if your SWR is already low. Adding a DX Engineering Feedline Current Choke at the point where the feedline exits the area of the antenna will substantially reduce unwanted feedline radiation or reception without the need for improved station grounding.
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Page 20: Technical Support And Warranty
All products manufactured by DX Engineering are warranted to be free from defects in material and workmanship for a period of one (1) year from date of shipment. DX Engineering’s sole obligation under these warranties shall be to issue credit, repair or replace any item or part thereof which is proved to be other than as warranted; no allowance shall be made for any labor charges of Buyer for replacement of parts, adjustment or repairs, or any other work, unless such charges are authorized in advance by DX Engineering.
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