[SI-LIST] Re: Where and how the Ground Noise Come from?
- From: James_R_Jones@xxxxxxxx
- To: wenjie-jack.yu@xxxxxxxxx, si-list@xxxxxxxxxxxxx
- Date: Mon, 3 Feb 2003 07:59:43 -0600
Jack,
Out of curiosity, how are you measuring your ground noise? In other words,
what type of probe are you using, and what are your probing locations?
James R. Jones
Dell
-----Original Message-----
From: wenjie-jack.yu@xxxxxxxxx [mailto:wenjie-jack.yu@xxxxxxxxx]
Sent: Monday, February 03, 2003 1:23 AM
To: si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] Where and how the Ground Noise Come from?
Dear All,
In the Mobile Phone, we have large GND noise (about 500mV) in the GSM =
900Mhz Power level 5 (about 2Watt power from antenna). And the noise =
happened in the GSM burst.=20
But this noise decrease with the Power Amplifier Level decrease.
So I want to ask where and how this noise come? its caused by Antenna =
Mismatch? Or the Shield have some leakage?=20
And how to decrease this noise?
> Best Regards,
> Jack
>=20
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