Re: Confusion about 'ports'

[Marcus D. Leech]

On 2022-03-16 17:31, Chad Spooner wrote:

Marcus:

Yes, I did miss that reply! Very sorry about that. Let me try to answer your questions:

First, I did try to use a single Source block with two channels on the advice of a colleague. I've been unable to get that to work either. (More on that below, after I answer your questions.)

The x310 has WBX (A) and UBX (B) daughtercards.

The x310's UBX RX2 input is coming from the TX/RX output of an N210 with a WBX daughtercard. The N210 is generating a DSSS signal and transmitting it on TX/RX.

The x310's WBX RX2 input is coming from a passive antenna (Ettus WA5JVB Log Periodic 850 MHz to 6500 MHz).

The x310's UBX TX/RX transmits the sum of the UBX RX2 and WBX RX2 signals.

A third SDR (x300) receives the x310's UBX TX/RX signal and that is the USRP I fetch data from using uhd_rx_cfile.

********

    You need to specify a subdev spec of:
    
    A:0 B:0
    
    Right now, you just have B:0, so it's trying to produce two channels
    from a single sub-device ,and, obviously, failing.