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Active Receive Antenna
Horizontal Configuration
.
ARAH3-1P - Horizontal Active Antenna
Used under US Patent No. 7,423,588
DXE-ARAH-INS-Revision 3f
© 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 ∙ E-mail: DXEngineering@DXEngineering.com
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Summary of Contents for DX Engineering DXE-ARAH3-1P
- Page 1 ARAH3-1P - Horizontal Active Antenna Used under US Patent No. 7,423,588 DXE-ARAH-INS-Revision 3f © 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 ∙ E-mail: DXEngineering@DXEngineering.com...
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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 Mounting Mast Ground System Connections... -
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
DXE-F6 - 75Ω F-6 Style, Direct Bury Coaxial Cable: Full Spool or Custom Cable Assemblies. Flooded coaxial cable is recommended. CATV F-6 is a high quality 75Ω flooded coaxial cable. Contact DX Engineering to have custom lengths of CATV F-6 cable manufactured with DXE-SNS6 - Snap-N-Seal 75 ohm Coaxial Connectors installed. -
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
Use PTX-81343 - Anti-Seize on all stainless steel hardware threads to prevent galling when tightening. Active Matching Unit The Active Matching Unit (ARAH) mounts to the front mounting plate. Mount the ARAH with the ANT − terminal up towards the six element block holes, using 5/8"... -
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: Mounting Mast
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. The 75 Ω coax feedline can be protected using a DXE-RLP-75FF lightning protector, available from DX Engineering. -
Page 10: 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 11: Low Frequency Response - Internal Jumpers
Low Frequency Response - Internal Jumpers The sensitivity response of the ARAH System does not need to be changed for most installations above 3.5 MHz. However, if you are interested in primary frequencies below 3.5 MHz, some adjustment may be required to increase sensitivity or eliminate interference from strong broadcast stations. -
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 In most circumstances, the DXE-ARAH3-1P Active Receive Horizontal antenna used singly, or in two and four antenna arrays, offers low level low band signals that have significantly improved signal-to-noise.
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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. Flooding also prevents shield contamination and can be direct-buried. - Page 18 DXE-TVSU - 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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