Hi Chambers,
You can send consequent 0 or 1 bits on one serdes channel（As channel 0）,and
send PRBS pattern on adjacent channels,
Then,the xtalk can be observed by an oscilloscope connecting to the output of
channel0.
BTW,the simulation of Xtalk in frequency domain is accurate enough to
replace testing
-----邮件原件-----
发件人: si-list-bounce@xxxxxxxxxxxxx <si-list-bounce@xxxxxxxxxxxxx> 代表 Chambers yin
发送时间: 2022年4月9日 8:51
收件人: Boris Bakshan <bbakshan@xxxxxxxxx>
抄送: SI-LIST <si-list@xxxxxxxxxxxxx>
主题: [SI-LIST] Re: test crosstalk of channel in package
Hi Boris,
Thanks for this information. But it is difficult for me to access the port on
the C4 bump. That is a real problem for us.
Br,
-Chambers
On Fri, Apr 8, 2022 at 11:19 PM Boris Bakshan <bbakshan@xxxxxxxxx> wrote:
Hi Chambers,
If you have access to the high speed channels with some RF connectors
(SMA/2.92mm/2.4mm), you can make SDD31/SDD4 measurements to conclude
NEXT/FEXT.
You can also look at the time-domain data of the measured NEXT/FEXT to
conclude the specific coupling location within the channel.
Good luck!
On Fri, Apr 8, 2022 at 4:06 PM Chambers yin <chambers.yin@xxxxxxxxx>
wrote:
Hi everybody,
is there a cost-effective testing method to measure xtalk of high
speed channel in the package? Now we have a PNA and some 2.4mm
cables, but don't have a probe station.
Br,
-Chambers
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