Re: how to use 2 usrp b210 to receive synchronously

2023-05-30 Thread james jordan 
thanks Marcus and Gwen.
so i need to add the python source rather than config on the gnuradio block?

From: discuss-gnuradio-bounces+james.jordan.999=hotmail@gnu.org 
 on behalf of 
Marcus D. Leech 
Sent: Tuesday, May 30, 2023 9:53 PM
To: discuss-gnuradio@gnu.org 
Subject: Re: how to use 2 usrp b210 to receive synchronously

On 30/05/2023 08:12, Gwenhael Goavec-Merou wrote:
> With the link:
> https://lists.gnu.org/archive/html/discuss-gnuradio/2019-11/msg00034.html
>
> Sorry
>
> Gwen
>
>
The key is to set a common start-time on the two multi_usrp objects
(after making sure that both units have
   a common understanding of clock-time).

But note that you likely won't achieve good-quality *phase coherence*
with this setup due to the way the
   AD9361 chip works, and the way the external-clock PLL works in the
B2xx series.

Re: how to use 2 usrp b210 to receive synchronously

2023-05-30 Thread Marcus D. Leech 

On 30/05/2023 08:12, Gwenhael Goavec-Merou wrote:

With the link:
https://lists.gnu.org/archive/html/discuss-gnuradio/2019-11/msg00034.html

Sorry

Gwen


The key is to set a common start-time on the two multi_usrp objects 
(after making sure that both units have

  a common understanding of clock-time).

But note that you likely won't achieve good-quality *phase coherence* 
with this setup due to the way the
  AD9361 chip works, and the way the external-clock PLL works in the 
B2xx series.

Re: how to use 2 usrp b210 to receive synchronously

2023-05-30 Thread Gwenhael Goavec-Merou 
With the link:
https://lists.gnu.org/archive/html/discuss-gnuradio/2019-11/msg00034.html

Sorry

Gwen


On Tue, 30 May 2023 14:03:18 +0200
Gwenhael Goavec-Merou  wrote:

> Maybe you have to look to this thread.
> Regards
> Gwen
> On Tue, 30 May 2023 11:54:44 +
> james jordan  wrote:
> 
> > Hi Marcus,
> > if i use 2 uhd source block how to make them synchronized.
> > 
> > From: discuss-gnuradio-bounces+james.jordan.999=hotmail@gnu.org
> >  on behalf of
> > Marcus Müller  Sent: Tuesday, May 30, 2023 7:42 PM
> > To: discuss-gnuradio@gnu.org  Subject: Re: how to
> > use 2 usrp b210 to receive synchronously
> > 
> > Dear James,
> > 
> > 
> > you can't; uhd::multi_usrp only supports a single B210 per instance. You
> > need to use two USRP source blocks.
> > 
> > 
> > Best regards,
> > 
> > Marcus
> > 
> > 
> > On 5/30/23 12:34, james jordan wrote:  
> > > Hi all,
> > > i have 2 usrp b210 and i want to make 4 channel rx system. i make a
> > > uhd source and config mboard num 2 and channel count 4. but when i run
> > > the programme it says "RuntimeError: LookupError: IndexError:
> > > multi_usrp: RX channel 2 out of range for configured RX frontends"
> > > so how to set the source block for 2 b210?
> >   
>

Re: how to use 2 usrp b210 to receive synchronously

2023-05-30 Thread Gwenhael Goavec-Merou 
Maybe you have to look to this thread.
Regards
Gwen
On Tue, 30 May 2023 11:54:44 +
james jordan  wrote:

> Hi Marcus,
> if i use 2 uhd source block how to make them synchronized.
> 
> From: discuss-gnuradio-bounces+james.jordan.999=hotmail@gnu.org
>  on behalf of
> Marcus Müller  Sent: Tuesday, May 30, 2023 7:42 PM To:
> discuss-gnuradio@gnu.org  Subject: Re: how to use 2
> usrp b210 to receive synchronously
> 
> Dear James,
> 
> 
> you can't; uhd::multi_usrp only supports a single B210 per instance. You
> need to use two USRP source blocks.
> 
> 
> Best regards,
> 
> Marcus
> 
> 
> On 5/30/23 12:34, james jordan wrote:
> > Hi all,
> > i have 2 usrp b210 and i want to make 4 channel rx system. i make a
> > uhd source and config mboard num 2 and channel count 4. but when i run
> > the programme it says "RuntimeError: LookupError: IndexError:
> > multi_usrp: RX channel 2 out of range for configured RX frontends"
> > so how to set the source block for 2 b210?  
>

Re: how to use 2 usrp b210 to receive synchronously

2023-05-30 Thread james jordan 
Hi Marcus,
if i use 2 uhd source block how to make them synchronized.

From: discuss-gnuradio-bounces+james.jordan.999=hotmail@gnu.org 
 on behalf of 
Marcus Müller 
Sent: Tuesday, May 30, 2023 7:42 PM
To: discuss-gnuradio@gnu.org 
Subject: Re: how to use 2 usrp b210 to receive synchronously

Dear James,


you can't; uhd::multi_usrp only supports a single B210 per instance. You
need to use two USRP source blocks.


Best regards,

Marcus


On 5/30/23 12:34, james jordan wrote:
> Hi all,
> i have 2 usrp b210 and i want to make 4 channel rx system. i make a
> uhd source and config mboard num 2 and channel count 4. but when i run
> the programme it says "RuntimeError: LookupError: IndexError:
> multi_usrp: RX channel 2 out of range for configured RX frontends"
> so how to set the source block for 2 b210?

Re: how to use 2 usrp b210 to receive synchronously

2023-05-30 Thread Marcus Müller 

Dear James,


you can't; uhd::multi_usrp only supports a single B210 per instance. You 
need to use two USRP source blocks.



Best regards,

Marcus


On 5/30/23 12:34, james jordan wrote:

Hi all,
i have 2 usrp b210 and i want to make 4 channel rx system. i make a 
uhd source and config mboard num 2 and channel count 4. but when i run 
the programme it says "RuntimeError: LookupError: IndexError: 
multi_usrp: RX channel 2 out of range for configured RX frontends"

so how to set the source block for 2 b210?

how to use 2 usrp b210 to receive synchronously

2023-05-30 Thread james jordan 
Hi all,
i have 2 usrp b210 and i want to make 4 channel rx system. i make a uhd source 
and config mboard num 2 and channel count 4. but when i run the programme it 
says "RuntimeError: LookupError: IndexError: multi_usrp: RX channel 2 out of 
range for configured RX frontends"
so how to set the source block for 2 b210?