On 01/03/2019 05:05 AM, Brais Ares wrote:
I also happen to have some spare B200 devices around and I can confirm
what @Martin stated.
Since we are working in a jitter-sensitive critical application and
after the tests I've perfomed, I'm inclined to think the minimum
jitter scenario occurs whe
I also happen to have some spare B200 devices around and I can confirm
what @Martin stated.
Since we are working in a jitter-sensitive critical application and after
the tests I've perfomed, I'm inclined to think the minimum jitter scenario
occurs when using the internal reference (2 ppm), given t
On 01/02/2019 06:18 PM, Martin K wrote:
Can the VCTCXO DAC be controlled via the UHD API?
I would rather manually calibrate on demand than see large jumps in frequency.
I don't think it is exposed in UHD, but with a little FPGA work, one
could perhaps have a control register that manifests in th
Can the VCTCXO DAC be controlled via the UHD API?
I would rather manually calibrate on demand than see large jumps in frequency.
On Wed, Jan 2, 2019 at 5:16 PM Marcus D. Leech via USRP-users
wrote:
>
> On 01/02/2019 09:54 AM, Brais Ares via USRP-users wrote:
>
> Hello,
>
> We've just bought an AX
On 01/02/2019 09:54 AM, Brais Ares via USRP-users wrote:
Hello,
We've just bought an *AXIOM90OCXO*[1] (actual configuration: 5 V, ±*50
ppb, +7.7 dBm*) and we are having trouble configuring it as an
external clock reference on a B200mini.
All we do in code is set the clock source as external:
The B200/B210 has an Analog Devices analog PLL (ADF4002) [U101].
The B200mini series are intended as small form factor, low-cost SDRs, not
high-precision devices. The PLL is implemented as digital logic in the
FPGA to minimize both cost and PCB board space, but limits the phase and
frequency accu
Brais,
I have two USRP here in front of me: B210, B200mini
When I run a sample program (C++) which specifies an external
reference, the B200mini shows a variable frequency offset. It seems to
lock (with high jitter) but then it "jumps" and I would say the offset
changes by +-10 Hz for a few second
Hello,
We've just bought an *AXIOM90 OCXO* [1] (actual configuration: 5 V, ±*50
ppb, +7.7 dBm*) and we are having trouble configuring it as an external
clock reference on a B200mini.
All we do in code is set the clock source as external:
- *usrp->set_clock_source("external");*
And loop until
