Hi Paul,
in (maint branch) host/lib/usrp/x300/x300_clock_ctrl.cpp,
set_master_clock_rate(double):
if(doubles_are_equal(_system_ref_rate, 10e6)) {
if(doubles_are_equal(clock_rate, 184.32e6)) {
/* 10MHz reference, 184.32 MHz master clock out, NOT Zero
Delay. */
clocking_mode = m10M_184_32M_NOZDEL;
}
[...]
Since the m10M_184_32M_NOZDEL-case further down seems implemented, I'd
expect that to work.
Greetings,
Marcus
On 10.10.2014 16:19, Paul Creaser wrote:
> I'm new to gnuradio and sdr. I'm looking to use a x310 usrp in an lte project.
> I have read it can support a 184.32MHz clock frequency
> which is great for LTE and a sample
> rate of 30.72MHz.
> I have looked at the uhd source code.
> I get the impression that the lte frequencies can only be supported
> if you use an external clock,
> I guess this means, external reference clock or Gspdo..
> I haven't found anything in my googling, which clarifies the situation.
>
> I liked to start withe the basic x310 and a daughter board
> , for example the sbx and add a gspdo
> etc... at a later date.
>
>
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