[SI-LIST] Re: Oscilloscope showing 50Hz signal
- From: bhavith <bhavithmp@xxxxxxxxx>
- To: "N. Paul Taddonio" <paul.taddonio@xxxxxxxxxxxxxx>, si-list@xxxxxxxxxxxxx
- Date: Tue, 29 May 2007 21:33:41 +0530
Hi
Thanks all for the reply.
my AC power is 50Hz.
My confusion is whethre it is just a mesurement problem or the i/p power to
the board is really noisy?
My board is working properly even when scope shows 50Hz, that means it is a
measurement proble??
also please help to find out the exact reason for this to happen.
Thanks & Regards,
Bhavith
On 5/24/07, N. Paul Taddonio < paul.taddonio@xxxxxxxxxxxxxx> wrote:
>
> Is 50 Hz the frequency of your AC power? It sounds like something is not
> grounded,
> this is a dangerous situation, you have a defective power supply or power
> cord somewhere.
>
> The UART cable is apparently providing the needed ground connection.
>
> Paul Taddonio
>
> ----- Original Message -----
> From: "bhavith" <bhavithmp@xxxxxxxxx >
> To: <si-list@xxxxxxxxxxxxx >
> Sent: Thursday, May 24, 2007 4:58 AM
> Subject: [SI-LIST] Oscilloscope showing 50Hz signal
>
>
> Hi
> I have an issue while probing with oscilloscope,
> When i probe at any point on the board, I am getting a 50Hz signal with
> 50V
> p-p.
> When i connect the UART cable from PC to the board, scope giving proper
> measurements.
> Can anybody explain the reason for this behaviour of the scope.
> Thanks and Regards,
> Bhavith
>
>
> ------------------------------------------------------------------
> 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 technical documents are available at:
> http://www.si-list.net
>
> 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 technical documents are available at:
http://www.si-list.net
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:
