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Re: [Discuss-gnuradio] Using USRP w/o Daughterboard's
From: |
address@hidden |
Subject: |
Re: [Discuss-gnuradio] Using USRP w/o Daughterboard's |
Date: |
Fri, 11 Nov 2005 12:02:18 -0500 |
No I have not yet made that change. I have been trying to figure out how
to use it. I don't understand the brief description
/*!
* \brief Enable/disable automatic DC offset removal control loop in FPGA
*
* \param bits which control loops to enable
* \param mask which \p bits to pay attention to
*
* If the corresponding bit is set, enable the automatic DC
* offset correction control loop.
*
* <pre>
* The 4 low bits are significant:
*
* ADC0 = (1 << 0)
* ADC1 = (1 << 1)
* ADC2 = (1 << 2)
* ADC3 = (1 << 3)
* </pre>
*
* By default the control loop is enabled on all ADC's.
*/
I don't know what to use for bit or mask values. Is this like the mux
values?
Please explain how you determine the bit and mask values to use?
Mike
Original Message:
-----------------
From: Eric Blossom address@hidden
Date: Fri, 11 Nov 2005 01:47:29 -0800
To: address@hidden, address@hidden
Subject: Re: [Discuss-gnuradio] Using USRP w/o Daughterboard's
On Thu, Nov 10, 2005 at 05:18:26PM -0700, Robitaille, Michael wrote:
> Thanks Eric, I got my direct interface to the USRP working and the
> usrp_oscope.py and ursp_fft.py examples work. I am very glad that the
> software defaults to a Basix Rx DB configuration when it finds no DB.
>
> One item that I am trying to chase down is that when I input a square wave
> at low frequencies (1 kHz to 10 kHz) I see a droop in the amplitude. The
> signal at the AD9862 input pins looks good. Can the droop be cause by the
> decimation filter?
>
Did you turn off the DC removal control loop in the FPGA?
Eric
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- Re: [Discuss-gnuradio] Using USRP w/o Daughterboard's, (continued)
- Re: [Discuss-gnuradio] Using USRP w/o Daughterboard's, Robitaille, Michael, 2005/11/05
- Re: [Discuss-gnuradio] Using USRP w/o Daughterboard's, Robitaille, Michael, 2005/11/07
- Re: [Discuss-gnuradio] Using USRP w/o Daughterboard's, Robitaille, Michael, 2005/11/07
- RE: [Discuss-gnuradio] Using USRP w/o Daughterboard's, Robitaille, Michael, 2005/11/08
- RE: [Discuss-gnuradio] Using USRP w/o Daughterboard's, Robitaille, Michael, 2005/11/10
- Re: [Discuss-gnuradio] Using USRP w/o Daughterboard's,
address@hidden <=
- Re: [Discuss-gnuradio] Using USRP w/o Daughterboard's, address@hidden, 2005/11/14