DX Engineering DXE-RTR-1A User Manual
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DX Engineering DXE-RTR-1A User Manual

Receive antenna interface for transceivers
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Receive Antenna Interface
for Transceivers
DXE-RTR-1A
U.S. Patent 8,175,546
DXE-RTR-1A-INS Revision 1b
© 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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  • Page 1 Receive Antenna Interface for Transceivers DXE-RTR-1A U.S. Patent 8,175,546 DXE-RTR-1A-INS Revision 1b © 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...

  • Page 2: Table Of Contents

    Introduction “An Amateur Radio Dilemma” The DX Engineering Solution Features General Information DXE-RTR-1A Receive Antenna Interface for Transceivers - Front Panel DXE-RTR-1A Receive Antenna Interface for Transceivers - Rear Panel Internal Jumpers Connection Descriptions Receiving Antenna Spacing Guidelines Typical System Configurations...

  • Page 3: An Amateur Radio Dilemma

    The DXE-RTR-1A is a new HF relay system that allows reception only if the unit is powered and the keying line from the transceiver is connected. As soon as the transceiver is keyed or the DXE- RTR-1A loses power at any time, the RF output from the transceiver is automatically diverted to the transmit antenna connection.

  • Page 4: General Information

    DX Engineering station accessories. Cable connections to the DXE-RTR-1A are made entirely on the back panel, and all switches and indicators are on the front panel, for a clean, easy-to-use installation.
  • Page 5 T/R relay, it switches a transmit antenna between a receiver and a transmitter with an output of up to 200 watts. The DXE-RTR-1A offers complete protection and high speed (4 ms) receive to transmit transfer. The DXE-RTR-1A is a superior solution to old, slow T/R relays, and it...
  • Page 6  Using an optional DXE-RSC-2 Two-Port Splitter/Combiner, a transmit antenna can be shared for dual receiving. Other uses of the DXE-RTR-1A are possible but not detailed in this manual:  Connecting a non-active receive only antenna to a transceiver and transmitting antenna system ...

  • Page 7: Dxe-Rtr-1A Receive Antenna Interface For Transceivers - Front Panel

    Receive Antenna Interface for Transceivers Figure 1  PWR ON-OFF Toggle Switch - DXE-RTR-1A power on and off. +12 Vdc power is supplied via the rear panel center positive connector.  RX ANT - ACTIVE indicator One Red LED (Light Emitting Diode) illuminates to indicate the DXE-RTR-1A is in the receive mode.

  • Page 8: Dxe-Rtr-1A Receive Antenna Interface For Transceivers - Rear Panel

    DXE-RTR-1A Receive Antenna Interface for Transceivers - Rear Panel Figure 2  TRANSMIT GROUND Isolated RCA connector - Keying line connection from transceiver or sequencer (grounding keying line only) for automatic relay switching of RADIO from the RX ANT IN to the MAIN ANT.

  • Page 9: Internal Jumpers

    RF connector. Maximum 200 Watts transmit with MAIN ANT connected to a suitable antenna or load. Connected, by default, to the MAIN ANT IN connector when the DXE-RTR-1A is not powered or the MAIN ANT/RX ANT switch in the MAIN ANT position. ...

  • Page 10: Connection Descriptions

    Connect a regulated station power supply which provides a 1 A fused 12 Vdc to the DXE-RTR-1A power connector on the back panel. With the included 2.1 mm power cord, the power connector must be wired center positive.

  • Page 11: Receiving Antenna Spacing Guidelines

    ON4UN's Low Band DXing book. Typical System Configurations In most cases, the operator will purchase the DXE-RTR-1A because they want to use a receive antenna on a transceiver which lacks a receive antenna input. See the text below and use Diagram 1B for an example using the DXE-RTR-1A with a transceiver having a Receive Input and Output.
  • Page 12 Customer supplied RF patch cords must be used to connect to the SO-239 RADIO and MAIN ANT IN ports on the DXE-RTR-1A to the RX IN and OUT ports on a transceiver, respectively, replacing the existing jumper patch cable. In most cases these are simply two patch cords with PL-259s on one end and male RCA phono plugs on the other end.
  • Page 13 Note: If the keying line is shared (using a "Y" adapter) with an amplifier or amplifier interface buffer, then precautions should be taken to be certain that the transceiver to DXE-RTR-1A connection is not interrupted. If the keying line connection from the transceiver to the TRANSMIT GROUND connector on the DXE-RTR-1A is lost, transmitted RF may cause damage to the DXE-RTR-1A or receiving equipment.

  • Page 14: Diagram 1A - Active Receive Antenna And Transmit Antenna

    Diagram 1A - Active Receive Antenna and Transmit Antenna Allows use of an active receive antenna with the added receive signal strength using a pre-amplifier. Optional items shown include: DXE-ARAV2-1P Active Vertical Receive Antenna w/ Internal Antenna Disconnect Relay. DXE-RFCC Receive Feedline Current Choke, DXE-FVI-1 Voltage Injector, DXE-RPA- 1 Receiver Preamplifier and DXE-PSW-12D1A +12 Vdc fused 1 amp wall transformer.
  • Page 15 Diagram 1B - Active Receive Antenna and Transmit Antenna Allows use of an active receive antenna with the added receive signal strength using a pre-amplifier connected to a transceiver equipped with RX INPUT and OUTPUT ports. Optional items shown include: DXE-ARAV3-1P Active Vertical Receive Antenna w/ Internal Antenna Disconnect Relay.

  • Page 16: Diagram 2 - Active Receive Antenna And Transmit Antenna Using High Power

    Diagram 2 - Active Receive Antenna and Transmit Antenna using High Power, allows use of an active receive antenna with the added receive signal strength using a pre-amplifier. Optional items shown include: DXE-ARAV3-1P Active Vertical Receive Antenna w/ Internal Antenna Disconnect Relay, DXE-RFCC Receive Feedline Current Choke, DXE-FVI-1 Voltage Injector, DXE-RPA- 1 Receiver Preamplifier, DXE-PSW-12D1A +12 Vdc fused 1 amp wall transformer, Ameritron AL-811 RF Amplifier and Ameritron ARB-704 Amplifier Buffer...

  • Page 17: Additional System Configurations

    The DXE-RTR-1A provides this connection option. Instantaneous receive comparisons between 'preamplifier in' and 'preamplifier out' are easily accomplished using the DXE-RTR-1A MAIN ON - RX ANT - MAIN ON toggle switch.
  • Page 18 Diagram 9 demonstrates how the DXE-RTR-1A may be used in a classic T/R relay application with an added bonus! The popular optional accessory for older receivers, the DX Engineering Receive Preamplifier model DXE-RPA-1, may be used safely, for improving reception on the transmit antenna, especially on higher frequencies.

  • Page 19: Diagram 3 - Dxe-Ncc-1 Receive Antenna Variable Phasing Controller With Two Active Receive Antennas

    Diagram 3 - DXE-NCC-1 Receive Antenna Variable Phasing Controller with two Active Receive Antennas Optional items shown include: DXE-ARAV3-1P Active Vertical Receive Antennas with Internal Antenna Disconnect Relays. DXE-NCC-1 Receive Antenna Variable Phasing Controller and DXE-PSW-12D1A +12 Vdc fused 1 amp wall transformers.

  • Page 20: Diagram 4 - Dxe-Ncc-1 Receive Antenna Variable Phasing Controller With Two

    Diagram 4 - DXE-NCC-1 Receive Antenna Variable Phasing Controller with two Active Receive Antennas using high power to the transmit antenna. Optional items shown include: DXE-AAPS3-1P Electronically Rotatable Receive Antenna System (which includes two DXE-ARAV3-1P Active Receive Antennas and one DXE-NCC-1 Receive Antenna Variable Phasing Controller), DXE-TVSU-1A Time Variable Sequencer Unit, Ameritron AL-811 Amplifier, Ameriton ARB-704 Buffer, MFJ-998 Antenna Intellituner, CW Key, Foot Switch, DXE-PSW-12D1A +12 Vdc fused 1 amp wall transformers and the DXE-MBVA-1UP Multi-band Vertical Antenna.

  • Page 21: Diagram 5 - Single Transmit Antenna System Using A Dxe-Rpa-1 Preamplifier

    Diagram 5 - Single Transmit Antenna System using a DXE-RPA-1 Preamplifier Optional items shown include: DXE-RPA-1 Receiver Preamplifier and DXE-PSW-12D1A +12 Vdc fused 1 amp wall transformers.
  • Page 22 Diagram 6 - Single Transmit Antenna System using a DXE-RBS-1 Reversible Beverage Antenna System Optional items shown include: DXE-RBS-1P Reversible Beverage Antenna System - Two Direction, DXE- CC-8A Control Console, DXE-FVC-1 Feedpoint Voltage Coupler, DXE-RPA-1 Receiver Preamplifier and DXE-PSW-12D1A +12 Vdc fused 1 amp wall transformers.
  • Page 23 Diagram 7 - Single Transmit Antenna with the DXE-RFS-TS2P Receive Four Square Array Package for Close Spacing to Transmit Antennas Optional items shown include: DXE-RFS-TS3P Receive Four Square Array Package for Close Spacing to Transmit Antennas, (which includes: (1) DXE-ARAV3-4P Package of 4 Active Receive Vertical Antennas w/ Internal Antenna Disconnect Relays, (1) DXE-RFS-2 Receiving Four Square Antenna Switch, (1) DXE- CC-8A 8 Position Control Console, (1) DXE-TVSU-1A Time Variable Sequence Unit , (1) DXE-F6-1000 CATV F-6 Style Coax, 75 ohm, F6 Flooded for Direct Burial, 1000' Spool, (25) DXE-SNS6-25 Snap-N-Seal...

  • Page 24: Antenna Variable Phasing Controller

    Diagram 8 - One Monoband or Multi-band Vertical Antenna phased with a DXE-ARAV2-1P Active Receive Antenna using the DXE-NCC- 1 Receive Antenna Variable Phasing Controller Optional items shown include: DXE-ARAV3-1P Active Receive Antenna, DXE-NCC-1 Receive Antenna Variable Phasing Controller), two DXE-PSW-12D1A +12 Vdc fused 1 amp wall transformers the DXE-MBVA-1UP Multi-band Vertical Antenna and a wideband MFJ-993B automatic tuner.

  • Page 25: Diagram 9 - Classic T/R Relay Connections For Separate Transmitter And Receiver With A Single Transmit Antenna System Using A Dxe-Rpa-1 Preamplifier

    Diagram 9 - Classic T/R relay connections for separate Transmitter and Receiver with a Single Transmit Antenna System using a DXE-RPA-1 Preamplifier Optional items shown include: DXE-RPA-1 Receiver Preamplifier, Ameriton ARB-704 Buffer and two DXE-PSW-12D1A +12 Vdc fused 1 amp wall transformers.

  • Page 26: Splitter/Combiner

    Diagram 10 - Relay connections for separate Transceiver and Receiver with a Single Transmit Antenna System using a DXE-RSC-2 Two-Port Splitter/Combiner Optional items shown include: DXE-RSC-2 Two-Port Splitter/Combiner, Ameriton ARB-704 Buffer and DXE-PSW-12D1A +12 Vdc fused 1 amp wall transformer.
  • Page 27 Diagram 11 - Relay connections for separate Transceiver and Receiver with an Active Receive and Single Transmit Antenna System using a DXE-RSC-2 Two-Port Splitter/Combiner Optional items shown include: DXE-RSC-2 Two-Port Splitter/Combiner, DXE-ARAV3-1P Active Receive Antenna, DXE-RFCC Receive Feedline Current Choke, DXE-FVI-1 Voltage Injector, DXE-RPA-1 Receive Preamplifier, DXE-RSC-2 Two-Port Splitter/Combiner and DXE-PSW-12D1A +12 Vdc fused 1 amp wall transformers.

  • Page 28: Operation

    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 29: Optional Items

    DX Engineering’s Active Receive Antenna Systems offer excellent receiving performance from 100 kHz to 30 MHz using a whip antenna element 102 in. long. DX Engineering’s unique design makes it vastly superior to traditional active antennas in both strong signal handling and feedline decoupling. You get significantly better weak signal reception due to lower spurious signal interference and reduced noise.
  • Page 30 DXE-RSC-2 - Two-port Splitter/Combiner Use the DX Engineering RSC-2 to combine two receiving antennas to form an array or to split the signal from an antenna to feed two receivers. The RCS-2 reduces problems and performance shortfalls caused by impedance errors in less-than-perfect antenna systems.
  • Page 31 DXE-400MAX Cable - PL-259 each end, Tested, 200 foot length  .405” low-density polyethylene jacket is UV resistant, ideal for outdoor use  Direct bury DX Engineering 400MAX is premium, low-loss, 50 ohm bulk cable with a special Attenuation/ Power Efficiency Type III-A, UV-resistant polyethylene jacket that is ideal for outdoor applications, 100 ft.

  • Page 32: Technical Support

    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;...

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