Re: [Discuss-gnuradio] Connecting two USRPs in one laptop in gnuradio companion

[Neel Pandeya]

If you're concerned about frequency stability, then you might want to consider using a GPSDO with your B210.

--​Neel Pandeya

On 21 May 2018 at 04:24, Inkyu Bang <address@hidden> wrote:

Dear Neel Pandeya

I have test in the following setup

Center frequency: 5.89GHz (I am using the antenna supporting this center frequency)

Sampling rate: 5MHz

Frequency of sine wave: 1kHz

From others’ comments, I realized that cancellation will not be successful if I do not calibrate LO offsets, which will result in frequency/phase offsets.

Thank you.

- Inkyu

2018. 5. 21. 오전 9:47, Neel Pandeya <address@hidden> 작성:

Hello Inkyu Bang:

Just repeating what Marcus asked. What sample rate are you using? Is this USB 2.0 or 3.0? Could you post your flowgraph?

--​Neel Pandeya

On 24 April 2018 at 06:08, Marcus D. Leech <address@hidden> wrote:

On 04/24/2018 06:09 AM, Inkyu Bang wrote:

Hi,

I am trying to use two USRP (B210) in one laptop.
I plan to send signals using two USRPs from the same source.

When I tried to separately run ".grc" file in each terminal, it works correctly.
However, when I tried to add one more "UHD: USRP sink" block in GRC.

It shows an exception message "S" and only one USRP works.

Could anyone help me to solve this problem?

(1) What is the meaning of "S"?
O: overflow, U: underflow, but I don't know what this is.

(2) Is there any way to use multiple "UHD: USRP sink" blocks in one machine?

Thank you,
Regards,

Inkyu Bang

What sample-rate are you using?   Is this over USB2.0 or USB3.0?

Could you share your .grc file?

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