USRP2 daughterboard recognition error

GNU Radio
1

Hello, folks,

It seems that my USRP2 won’t recognize the presence of daughtercard
correctly.

What I did today was running the ‘usrp2_wfm_rcv.py’ program in sample
directory and I could not managed the program running correctly. While
I was tracking down the problem, I unplugged my basicRX daughterboard
from the USRP2 and ran 'usrp2_rx_cfile.py in ‘gr-utils/src/python’
directory. The followings are the result.

Using mid-point gain of 0.0 ( 0.0 - 0.0 )
Network interface: eth0
USRP2 address: 00:50:c2:85:30:3f
Using RX d’board id 0x0001
Rx gain: 0.0
Rx baseband frequency: 0
Rx DDC frequency: 4.9M
Rx residual frequency: 11.735m
Rx decimation rate: 16
Rx sample rate: 6.25M
Receiving samples until Ctrl-C
Writing 32-bit complex floats
Output filename: RxDump

As you can see, the program detects the RX daughterboard id as 0x0001
while no daughterboard is connected to the mainboard.
That is just the same result out of a test with the daughterboard
connected on the right place. So, I’m very suspicious if the program
does not investigate the presence of daughtercard correctly.

I can do further test with DBRX(?) daughterboard at home but it would
take some time because I have to replace the main board of my
computer. So, I just wonder if I can get a help out there having a
clue on my case.

Best regards,

Ilkyoung.

2

FYI,

2008/12/10 ILKYOUNG KWOUN [email protected]:

3

On Wed, Dec 10, 2008 at 4:15 AM, ILKYOUNG KWOUN [email protected]
wrote:

It seems that my USRP2 won’t recognize the presence of daughtercard correctly.
[…]
As you can see, the program detects the RX daughterboard id as 0x0001
while no daughterboard is connected to the mainboard.
That is just the same result out of a test with the daughterboard
connected on the right place. So, I’m very suspicious if the program
does not investigate the presence of daughtercard correctly.

The code is designed to identify as a BasicRX if it doesn’t identify
any other card. This is primarily for debugging purposes.

But there does seem to be an issue that we are sending back a 0 - 0
gain range in this case, and not handling it correctly elsewhere.

I can do further test with DBRX(?) daughterboard at home but it would
take some time because I have to replace the main board of my
computer. So, I just wonder if I can get a help out there having a
clue on my case.

The DBSRX board is not yet supported by the USRP2 software.

What was the daughterboard you were originally trying to use?

-Johnathan