RFX900 Gain

Hi all,

Is there a way to reduce the gain of the RFX900 board?

Using the “self.subdev.set_gain(self.subdev.gain_range()[1]/Att)”
function
does not seem to change anything.

Thanks!

On Fri, Apr 25, 2008 at 07:25:44PM -0400, Wireless Monster wrote:

Hi all,

Is there a way to reduce the gain of the RFX900 board?

Using the “self.subdev.set_gain(self.subdev.gain_range()[1]/Att)” function
does not seem to change anything.

Thanks!

This is RX gain, right?

Are you setting it to something between gain_range()[0] and
gain_range()[1]?

Eric

On Wed, Apr 30, 2008 at 09:38:33AM -0400, Wireless Monster wrote:

Hi Eric,
No, I am trying to adjust the Tx gain… Any clue?
Thx!

If you look at the value returned by self.subdev.gain_range(), you’ll
note that the minimum and maximum values are the same. That is, the
board has no adjustable gain.

To change the level of the output, scale the signal you’re sending to
the usrp. gr.multiply_const_cc works well.

Eric

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