Rf attenuator / SCU Gain

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  • Question
  • Updated 8 months ago
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The manual for the 6400M indicates the front end RF preamp/attenuator can be set between xxx and xxx. On the menu there is a slider and apparently it is band independent. However there is no scale to indicate what it is set at other then all the way to the left is minimum and all the way to the right is maximum.

Is there anymore info than that as far as the value of db that is inserted as attenuation or gain that the slider matches up with?
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Wayne

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Posted 8 months ago

  • 1
Photo of Wayne

Wayne

  • 614 Posts
  • 84 Reply Likes
Official Response

The 6400M manual states it can be adjusted from -8db thru +32db in 8 db steps. Therefore the bar from left to right per position or click is: -8 / 0 / +8 / +16 / + 32 /  Any position choosen which is NOT Off (0db) results in the setting such as -8db to be shown in the upper right corner of the Panadapter.

However since there is only 1 SCU on the 6400M you cannot have a different setting of the Preamp per Panadapter the preamp function applies to the SCU however is displayed on the Panadapter'

Reference Page 84 of the 6400M/6600M User Guide Version 2.1.30 published 1/29/18.