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DX Engineering DXE-TVSU-1B Manual

Time variable sequencer unit
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Time Variable Sequencer Unit
DXE-TVSU-1B
DXE-TVSU-1B-INS Rev 0a
© DX Engineering 2014
1200 Southeast Ave. - Tallmadge, OH 44278
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-TVSU-1B

  • Page 1 Time Variable Sequencer Unit DXE-TVSU-1B DXE-TVSU-1B-INS Rev 0a © DX Engineering 2014 1200 Southeast Ave. - Tallmadge, OH 44278 Phone: (800) 777-0703 ∙ Tech Support and International: (330) 572-3200 Fax: (330) 572-3279 ∙ E-mail: DXEngineering@DXEngineering.com - 1 -...

  • Page 2: Table Of Contents

    Table of Contents Introduction Features Typical Applications Compensating for Slow Power Amplifier Relays Protecting Receiving Equipment Detuning a Transmitting Antenna Protective Timing to Transverters Panel Connectors and Controls Connections Operation Transmit Sequence Receive Sequence Time Delay Settings CW Sidetone Audio Levels Sequencer Timing Diagram (Figure 4) Appendix A - Typical Connection Configurations Icom 756 Pro III...

  • Page 3: Introduction

    1000 Hz in 50 Hz increments and has adjustable volume. The TVSU-1B supports full break-in operation. When used with the DX Engineering Active Receive Antennas, this unit provides properly sequenced antenna power. This allows active antennas to be placed closer to transmit antennas (1/10-wavelength at the lowest operating frequency) without risking RF damage.

  • Page 4: Features

    Receiving equipment must be completely disabled before transmitter RF appears. The very fast relays used in the DX Engineering AVA-2 series of receiving amplifiers, used for the active antennas, require 2 ms of switching time. Some radios provide adequate time at the linear amplifier keying port, but many do not.

  • Page 5: Protective Timing To Transverters

    relay to work without causing problems. Examples of how to de-tune an antenna can be found in ON4UN's book "Low-Band DXing". Protective Timing to Transverters Stand-alone transverters/converters are used for VHF/UHF or EME communications. Some are used for receive-only, and must be bypassed or turned off prior to transmitting. The TVSU-1B can switch-off the power or provide an auxiliary timed delay to the equipment.

  • Page 6: Connections

    TIP is INPUT, RING is OUTPUT. Plug SLEEVE is COMMON. Adjustable "on" delay from the INPUT to OUTPUT. Accepts input from independent PTT hand or foot switch. Output connects to the transceiver PTT input line. Low = Transmit. 1/8" [3.5 mm] stereo plug, (included with the TVSU- 1B).
  • Page 7 DXE-DCPC-24 is specifically used in a DX Engineering receiving antenna phasing system between the "PRE-AMP POWER OUT" port on the DXE-TVSU-1B Time Variable Sequence Unit, and the "ANT PWR" power input on the DXE-NCC-1 Receive Antenna Phasing Controller. The DXE-DCPC-24 is a 24 inch red and black stripe power cable that features TWO 2.1 mm DC power connectors known as...
  • Page 8 Figure 1 - Basic Connections to Typical Peripheral Equipment - 8 -...
  • Page 9 Refer to Figure 1 for additional TVSU-1B connections Figure 2 - 9 -...

  • Page 10: Operation

    4. AUX OUT pulls low after programmed delay. NOTE: DX Engineering ARAV3 or ARAH2 active receive antenna systems require approximately 2 ms to mute. Other receive systems may take longer. Program sufficient delay in the PTT or CW delay to ensure the receive antenna, linear amplifier or any other switched devices are fully activated or deactivated before sending PTT closure or CW keying signals to the transceiver.

  • Page 11: Vox

    You cannot use VOX on voice transmissions with the TVSU-1B while the receiving antennas are being used, the PTT keying line must be used. VOX operation activates the rig internally, eliminating the possibility of a sequenced turn-on by the TVSU-1B. The same applies to using a hand mike unless you operate the TVSU-1B from the microphone PTT wire, and use the sequencer’s PTT output to operate the radio PTT.

  • Page 12: Cw Sidetone Audio Levels

    Note: The delay time increments work independently and are not additive. Typical Switchover Times:  Linear Amplifier: 5 to 15 ms  DX Engineering Active Antennas (using the AVA-2 amplifier): 2 ms  Tube Transceivers: 5 to 30 ms  Solid State Transceivers: 3 to 15 ms ...

  • Page 13: Sequencer Timing Diagram (Figure 4)

    Figure 4 - TVSU-1B Timing Diagram - 13 -...

  • Page 14: Appendix A - Typical Connection Configurations

    Appendix A - Typical Connection Configurations Verify all connections and settings with your radio manufacturer's manual. Figure A-1 - Icom 756 Pro III - 14 -...

  • Page 15: Kenwood Ts-2000

    Verify all connections and settings with your radio manufacturer's manual. TX Mode: See note below Kenwood TX Mode: Verify Menu Setting 28A for a "1" = 10ms Amp Delay Figure A-2 - Kenwood TS-2000 Verify all connections and settings with your radio manufacturer's manual. - 15 -...

  • Page 16: Yaesu Ft-2000

    Figure A-3 - Yaesu - FT-2000 - 16 -...

  • Page 17: Optional Items

    DX Engineering’s Active Receive Antenna system offers 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 18 DXE-CC-8A - Control Console, 8 Position The CC-8A Control Console is a flexible, 8-position controller used to control the DX Engineering RR8 series antenna switches, the RFS-2P Receive Four Square controller or any product that uses a 12 or 24* Vdc 1-of-8 or BCD control format.
  • Page 19 DXE-CPT-659 - Coax Cable Stripper for CATV F-6, RG-6 and RG-59 coaxial cable. Coax Cable Stripper for CATV F-6, RG-6 and RG-59 coaxial cable. Includes 1 Replacement Blade - DXE-CPT-659 Prepares CATV F-6, RG-6 and RG-59 coaxial cable for the installation of an "F" type connector - One- step cutting motion ...

  • Page 20: Technical Support And Warranty

    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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