On Sun, Jun 22, 2008 at 02:42:03AM -0700, wolfgang buesser wrote:
>
> Hi,
>
> Iam using
>gr.sig_source_s (self.usb_freq (), gr.GR_CONST_WAVE, 0, 0, 0)
> to generate a carrier and
>usrp.source_c(nchan=2,decim_rate=self.interp) to resample it at the same
> frequency.
>
> I get what I exp
On Sun, Jun 22, 2008 at 05:21:41AM -0700, wolfgang buesser wrote:
>
> Sorry,
> I may be completely off track, but I dont' see any clock-source on
> the schematic of my LF-RX/TX (not basic RX/TX). As far as I
> understand they only process the signals as baseband without any
> frequency conversio
Sorry,
I may be completely off track, but I dont' see any clock-source on the
schematic of my
LF-RX/TX (not basic RX/TX).
As far as I understand they only process the signals as baseband without any
frequency
conversion.
Yes, I have to use 2 daughter-boards (one LF-RX and one LF-TX) to complete
That's true, but their are two frequency synthesizers (ADF4360-0 on my
flex2400) on each flex daughter card (one for TX and one for RX -- or
more generically one for each sub-subdevice). On the basic daughter
cards (which only have one sub-subdevice) there is only one
synthesizer, but you need a se
Just to make sure:
I am using LF RX/TX-boards.
TX and RX are on the subdev (thus using the same AD9862)
Thanks
Wolfgang
Jonathan Friedman-2 wrote:
>
> Unless I misunderstand what you are doing, what you are describing is
> the coherence error of the system. The long-answer made short is "no"
Unless I misunderstand what you are doing, what you are describing is
the coherence error of the system. The long-answer made short is "no".
You have to calibrate it out or otherwise live with it. The TX and RX
paths of the USRP are derived from separate hardware local oscillators
so there will alw
Hi,
Iam using
gr.sig_source_s (self.usb_freq (), gr.GR_CONST_WAVE, 0, 0, 0)
to generate a carrier and
usrp.source_c(nchan=2,decim_rate=self.interp) to resample it at the same
frequency.
I get what I expect: 2 complex numbers which are pretty constant. But with
every restart
of the progra
