[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [Discuss-gnuradio] some problems about usrp motherboard that i make
|
From: |
Jeffrey Lambert |
|
Subject: |
Re: [Discuss-gnuradio] some problems about usrp motherboard that i make by myself |
|
Date: |
Thu, 22 Jul 2010 19:43:19 -0400 |
|
User-agent: |
Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.1.11) Gecko/20100711 Thunderbird/3.0.6 |
You haven't provided enough information for us to begin to help you.
Did you make the PCB Layout yourself, or did you use existing drawings?
Did you do electrical tests on critical traces? How did you do the
surface mounting? Did you check pins for shorts after soldering? Etc.,
etc., etc.
It's worth pointing out that you could still have a software problem, too.
Some hints to check for are the serial configuration interfaces into the
AD9862 ICs - there could be a bad connection here causing a misconfig on
the IC. There could also be a problem with the board power or ground.
There could be impedance mismatches. Perhaps the (FX2?) EEPROM is corrupt?
~Jeff
On 7/21/2010 11:48 PM, tonygc wrote:
who can tell me the reason? any help will be appreciated...
--
~Jeffrey Lambert, K1VZX