On 2022-07-27 14:22, Lipski, Michael Victor wrote:
Sure, screenshot of flowgraph is included.  GRC version is 3.8, UHD is 4.1.0.

The E310 is being used in networking mode for some very basic testing.  I have an E312 set up as to transmit a sine wave output (USRP Sink), which is connected over SMA to the E310 Rx ports (USRP Source).  This works fine with a single Rx channel, and I can split the output of the transmitter and feed it to two different E310s, which works just fine as well.  However, if I try to receive them both on the same E310, I get an error.
On a separate note, I assume you have 30-50dB of attenuation inserted into the lines between the TX and RX?


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*From:* Discuss-gnuradio <discuss-gnuradio-bounces+mvl5023=psu....@gnu.org> on behalf of Marcus D. Leech <patchvonbr...@gmail.com>
*Sent:* Wednesday, July 27, 2022 1:58 PM
*To:* discuss-gnuradio@gnu.org <discuss-gnuradio@gnu.org>
*Subject:* Re: Receiving on two channels with E310/E312
On 2022-07-27 13:40, Lipski, Michael Victor wrote:
I tried both options; "A:A A:B" was invalid; it seems to accept "A:0 A:1", except that it gives me the same error message: "Runtime Error: port number 1 exceeds max of 0."

Everything works fine with a single receive channel.  I have also tried streaming a single receive channel from two different E310s, which works just fine as well.  As soon as I try to add a second Rx channel, the flowgraph stops working.
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Could you perhaps share the flow-graph with the list, and which version of UHD, Gnu Radio you're using?   Are you running on the E310 itself, or using
  "network mode" ?


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