[SI-LIST] Re: FET Probe
- From: "Ravinder Ajmani" <ajmani@xxxxxxxxxx>
- To: si-list@xxxxxxxxxxxxx
- Date: Thu, 31 Oct 2002 15:17:20 -0800
Hi James,
I too had observed similar problem, when scoping the DDR Strobe signal with
an HP (now Agilent) FET probe. However, the problem vanished once I
connected the short ground pin. You also have to make sure that the probe
is directly connected to the board, and not through a long jumper wire.
Regards, Ravinder
PCB Development and Design Department
IBM Corporation
Email: ajmani@xxxxxxxxxx
***************************************************************************
Always do right. This will gratify some people and astonish the rest.
.... Mark Twain
James_R_Jones@Del
l.com To: si-list@xxxxxxxxxxxxx
Sent by: cc:
si-list-bounce@fr Subject: [SI-LIST] FET Probe
eelists.org
10/31/2002 12:15
PM
Please respond to
James_R_Jones
Gurus,
Does anyone have a basic schematic for Tektronix FET probe? I don't need
proprietary details about the probes, but just a basic schematic of what we
see looking into the probe, and relative to scope ground.
The reason that I am asking is that I have a board that will not come up
properly when the positive terminal of the probe is hung off of a DDR
strobe
line. No ground attachment required. With the probe disconnected from the
scope at the scope, the problem does not exist. Anyone seen this before?
Thanks in advance,
James R. Jones
ESG Signal Integrity
Dell Computer Corporation
(512) 725-1809
------------------------------------------------------------------
To unsubscribe from si-list:
si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field
or to administer your membership from a web page, go to:
//www.freelists.org/webpage/si-list
For help:
si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field
List archives are viewable at:
//www.freelists.org/archives/si-list
or at our remote archives:
http://groups.yahoo.com/group/si-list/messages
Old (prior to June 6, 2001) list archives are viewable at:
http://www.qsl.net/wb6tpu
------------------------------------------------------------------
To unsubscribe from si-list:
si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field
or to administer your membership from a web page, go to:
//www.freelists.org/webpage/si-list
For help:
si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field
List archives are viewable at:
//www.freelists.org/archives/si-list
or at our remote archives:
http://groups.yahoo.com/group/si-list/messages
Old (prior to June 6, 2001) list archives are viewable at:
http://www.qsl.net/wb6tpu
Other related posts:
