Official bladeRF forum

So I have my bladeRF and transverter working (at least with the 'live' gnuradio/ubuntu).

Reading the notes on the XB200, I see:

Resistors R62 and R63 on the XB-200 were populated for early production boards.

While I can probably remove those resistors easily enough... I'd hate to trust my SMT skills trying to put them back on

I've only had my board a few weeks - has there been another run of boards with fixed values or do I have one of the 'early production boards' ?

Unfortunately, this causes unbalanced loading on the analog signals feeding the RF chain and will severely degrade performance. It is highly recommended to remove R62 and R63 on the XB-200 if they are populated.

Is this 'severely degrade performance' just for the DAC output (J15) or more widespread?

Happy Heyoka wrote:I've only had my board a few weeks - has there been another run of boards with fixed values or do I have one of the 'early production boards' ?

I'm not sure, but have reported this to the proper folks as they are not supposed to be getting populated on new boards.

Happy Heyoka wrote:Is this 'severely degrade performance' just for the DAC output (J15) or more widespread?

You'd see degredation on the TX output, so it's important to remove these.

jynik wrote:

Happy Heyoka wrote:I've only had my board a few weeks - has there been another run of boards with fixed values or do I have one of the 'early production boards' ?

I'm not sure, but have reported this to the proper folks as they are not supposed to be getting populated on new boards.

off they come then.

I've attached some grabs from my microscope of the xb200 I have, with any luck it'll help pin down a batch number...