MFJ -1708B-SDR Instruction Manual

MFJ -1708B-SDR Instruction Manual

Rf sense sdr receiver tr antenna switch

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Summary of Contents for MFJ MFJ-1708B-SDR

  • Page 2 SDR Receive port to reduce crosstalk and interference between the two ports. The SDR port has a protection circuit to help prevent damage from transmit RF. The MFJ-1708B- SDR has a Stripline PCB reducing the SWR up through 450MHz and improved isolation for better receiver protection.
  • Page 3 CCW is minimum delay which is around 40-50ms. Full CW is maximum which is around 2-4 seconds. Note Do Not use the MFJ-1708B-SDR with transmitters over 200W or place it on the output of linear amplifiers over 200W. If the MFJ-1708B-SDR is used in conjunction with a linear amplifier place it in between the amplifier and the exciter.
  • Page 4 Board Jumpers JP1 Left for GROUND to RECEIVE, Right for UNGROUND to RECEIVE JP2 Left for RF Sense, Remove for no RF Sense. Schematic...
  • Page 5 If the manual does not reference your problem or your problem is not solved by reading the manual you may call MFJ Technical Service at 662-323-0549 or the MFJ Factory at 662-323-5869. You will be best helped if you have your unit, manual and all information on your station handy so you can answer any questions the technicians may ask.
  • Page 6 NOTES...
  • Page 7 Wired and tested PC board products are covered by this warranty provided only the wired and tested PC board product is returned. Wired and tested PC boards installed in the owner's cabinet or connected to switches, jacks, or cables, etc. sent to MFJ Enterprises, Inc. will be returned at the owner's expense un-repaired.
  • Page 8 MFJ Enterprises, Inc 300 Industrial Park Rd. Starkville, MS 39759...

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