On 2022-04-19 22:44, Zeng, Huacheng wrote:
Below is a more detailed description of our issue.
1. We have an X310 with two BasicRX boards installed (no BasicTX). We
tried to read the two data streams from X310 on a computer at a
sampling rate 5Msps. The computer displays "OOOOOOOOOOOO" overflow
constantly. We tried other sampling rates such as 1Msps and 10Msps,
the observation is the same.
What version of UHD are you using? BasicRX support on the X310 in
earlier releases was broken.
We found that the LED lights on the X310 panel are abnormal. When X310
works in RX mode, the two LED lights (RF A's RX2 LED and RF B's RX2
LED) should be on, but we observed they were flashing. Also, the LINK
LED should be on in RED, but we observed that it was flashing in ORANGE.
We reloaded the FPGA image, but the problem is consistent.
2. We removed BasicRX from X310's RF B channel, and tested one data
stream from X310 RF A's channel, it works (no overflow). We are sure
that the two BasicRX boards have no problem, as they are brand new.
3. We removed two BasicRX boards and installed two BasicTX boards on
the same X310. We used GNU RADIO to send two data streams to X310 for
signal transmission. It works well and has no overflow issue.
We want to test X310's RF B channel, but we do not know how to set the
parameters so that GNU Radio can read the data stream from X310's RF B
channel. Would it be an argument like "subdev=B"? It looks like GNU
Radio always gets data stream from RF A channel if we set the channel
number to 1. Please suggest if it is possible.
https://files.ettus.com/manual/page_configuration.html#config_subdev
Also, this thread here, on a related topic (Basic_RX on X310) may help:
https://usrp-users.ettus.narkive.com/Mbf3kutl/subdev-spec-for-two-channels-with-usrp-x310
Any suggestion and help would be appreciated!
On Tue, Apr 19, 2022 at 6:03 PM Marcus D. Leech
<[email protected]> wrote:
On 2022-04-19 15:05, Shichen Zhang wrote:
> Hello everyone,
>
> I am doing some experiments and I need to build the 2 by 2
> communication using X310 with the BasicRX Daughterboard. I use the
> X310 as both the transmitter and receiver. I can successfully
test the
> 1 by 1 case, however, when I test the 2 by 2 case, the overflow
> happened and the program could not be stopped. The RF B channel
seems
> not to work ( LED light for RF B RX not flash).
>
> I have attached the flowchart for your reference.
>
> Best,
> SZ
>
What is your complete hardware configuration? I assume 2 x
BasicRX and
2 x Basic TX?
It may just be the case that your computer simply isn't up to the
task
of moving 20Mssp of data in and out of the radio, along with doing
2 x
FFTs and computing the
noise sources.
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