[Discuss-gnuradio] Re: Residual Frequency?

[Wireless Monster]

After doing some experiments I came out with another more important problem...

Instead of my previous frequency that gave some residual, I tried the integer frequency 926M, so I get:

Using TX d'board A: Flex 900 Tx MIMO B
r.baseband_freq = 930M
r.dxc_freq      = -4M
r.residual_freq = 0
r.inverted      = False

The issue is that on the spectrum analyzer I get the signal centered at 930 and not 926M. 

Any clue why the r.dxc offsset is not working? I check the 'tune' function and it should do...

Thanks!

On Fri, Apr 18, 2008 at 3:38 PM, Wireless Monster <address@hidden> wrote:

Hi All,

I am trying to send a GSM modulated signal using the USRP and the RFX900 board using the 'tune' function as in the provided usrp examples:

r = self.u.tune(self.subdev._which, self.subdev, target_freq)

The desired frequency is 925.6MHz, and I am getting a -381.47m residual_frequency as shown below.

What will be the best way to correct that, so I get the signal modulated to the desired frequency?

Thanks in advance to all for your help!

---8<----

Using TX d'board A: Flex 900 Tx MIMO B
r.baseband_freq = 930M
r.dxc_freq      = -4.4M
r.residual_freq = -381.47m
r.inverted      = False