Where in the manual does it tell how to set the pre amplifiers on the 6600M.

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OK.  I have read the manual and I can not find out how to set the pre amps on the 6600M.  Can someone ref a page or explain it for me.
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KB4OIF

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Posted 3 weeks ago

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Tom O'Boyle

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Douglas Fillingham

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Click on ANT at the left hand side and see RF gain
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Joe N3HEE

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Here is a response from Gerald on how to set the preamp.  See this thread.


https://community.flexradio.com/flexradio/topics/6600-noise-levels-10db-higher-on-my-new-6600-vs-my-...
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Joe N3HEE

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Here is the process to optimize receiver sensitivity for your given operating conditions:
  1. Find a clear frequency on your VFO.  Bandwidth doesn't matter.
  2. Disconnect the antenna - You can select an input with no connection like RXA or XVTA.
  3. Note the dBm reading with no antenna
  4. Connect the antenna
  5. Note the reading in dBm.  This is where an accurate dBm calibrated S meter really counts.  Ours is truly 6 dB per S unit and measures the actual receiver sensitivity in the selected bandwith.
  6. If the noise goes up about 8-10 dB, you have the optimal setting for the noise on your antenna given time of day and propagation.  
  7. If the noise goes up significantly more than 10 dB, you have too much preamp gain, which will limit dynamic range for large signals.  Reduce preamp gain.
  8. If the noise goes up much lest than 8 dB, increase preamp gain to get it close.
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KB4OIF

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ok.  Thanks everyone.  I knew that I had seen it before but could not remember how to do it.