[From nobody Sat Aug 16 21:13:44 2008 Return-Path: <support-bounces@lists.openmoko.org> Received: from mail.openmoko.org ([unix socket]) by mail.openmoko.org (Cyrus v2.1.18-IPv6-Debian-2.1.18-5.1) with LMTP; Tue, 05 Aug 2008 11:53:20 +0000 X-Sieve: CMU Sieve 2.2 Return-path: <support-bounces@lists.openmoko.org> Received: from sita.openmoko.org ([88.198.124.203]) by mail.openmoko.org with esmtps (TLS-1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.63) (envelope-from <support-bounces@lists.openmoko.org>) id 1KQL6N-0004Br-VE; Tue, 05 Aug 2008 11:53:20 +0000 Received: from localhost ([127.0.0.1] helo=sita.openmoko.org) by sita.openmoko.org with esmtp (Exim 4.63) (envelope-from <support-bounces@lists.openmoko.org>) id 1KQL5y-0004BP-Bx; Tue, 05 Aug 2008 13:52:54 +0200 Received: from mail.openmoko.org ([88.198.124.205]) by sita.openmoko.org with esmtp (Exim 4.63) (envelope-from <joerg@openmoko.org>) id 1KQL5p-0004BH-0M for support@lists.openmoko.org; Tue, 05 Aug 2008 13:52:52 +0200 Received: from 118-166-66-221.dynamic.hinet.net ([118.166.66.221] helo=halley) by mail.openmoko.org with esmtpsa (TLS-1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.63) (envelope-from <joerg@openmoko.org>) id 1KQL5n-00040U-Qd; Tue, 05 Aug 2008 11:52:44 +0000 From: Joerg Reisenweber <joerg@openmoko.org> To: support@lists.openmoko.org Date: Tue, 5 Aug 2008 19:49:51 +0800 User-Agent: KMail/1.9.6 (enterprise 20070904.708012) References: <BAY110-W43DE694BBBFFCC609C286DD7B0@phx.gbl> <4898315E.6050107@openmoko.com> <30e395780808050418o3984017fpa7785f78c977717c@mail.gmail.com> In-Reply-To: <30e395780808050418o3984017fpa7785f78c977717c@mail.gmail.com> MIME-Version: 1.0 Message-Id: <200808051949.52264.joerg@openmoko.org> X-Spam-Checker-Version: SpamAssassin 3.1.7-deb (2006-10-05) on sita.openmoko.org X-Spam-Level: X-Spam-Status: No, score=-4.4 required=5.0 tests=ALL_TRUSTED,BAYES_00 autolearn=ham version=3.1.7-deb Subject: Re: Buzzing sound Cc: Jeffrey Ratcliffe <jeffrey.ratcliffe@gmail.com> X-BeenThere: support@lists.openmoko.org X-Mailman-Version: 2.1.9 Precedence: list Reply-To: Support for Openmoko Device Owners <support@lists.openmoko.org> List-Id: Support for Openmoko Device Owners <support.lists.openmoko.org> List-Unsubscribe: <https://lists.openmoko.org/mailman/listinfo/support>, <mailto:support-request@lists.openmoko.org?subject=unsubscribe> List-Archive: <http://lists.openmoko.org/pipermail/support> List-Post: <mailto:support@lists.openmoko.org> List-Help: <mailto:support-request@lists.openmoko.org?subject=help> List-Subscribe: <https://lists.openmoko.org/mailman/listinfo/support>, <mailto:support-request@lists.openmoko.org?subject=subscribe> Content-Type: multipart/mixed; boundary="===============0576034371==" Mime-version: 1.0 Sender: support-bounces@lists.openmoko.org Errors-To: support-bounces@lists.openmoko.org X-UID: 18404 X-Length: 5547 --===============0576034371== Content-Type: multipart/signed; boundary="nextPart2040401.nsPl7GbSpd"; protocol="application/pgp-signature"; micalg=pgp-sha1 Content-Transfer-Encoding: 7bit --nextPart2040401.nsPl7GbSpd Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline Am Di 5. August 2008 schrieb Jeffrey Ratcliffe: > 2008/8/5 Andy Green <andy@openmoko.com>: > > Like Ole says when I started looking at it, by calling a landline in the > > same room and listening to its receiver lying on the desk, it varied > > tremendously and not in a repeatable way. Eg, it appeared to vary by > > orientation of the phone, but when I traced the path backwards, the buzz > > did not return. >=20 > OK. Confirming this - the buzzing seems to come and go in waves of > varying frequency. Even without touching the phone, the buzzing just > comes and goes. I noticed the buzz come and go in discrete steps. I guess that's basestatio= n=20 sending PCF commands to mobile, to level up/down the TX-power. BS decides on this depending on signal-quality of MS as BS sees it. It would be *very* helpful to confirm this, by using some RF-meter (e.g.=20 microwave leakage tester?), and/or reading the battery current, while=20 observing the noise come and go- >=20 > > Also, I had to keep whistling during this to provoke transmission > > actions that seem to be the start of the issue. >=20 > You obviously need a signal generator for repeatability - unless you > have perfect pitch... Nah, that's just to give some data to GSM-chip it has to transmit. Otherwis= e=20 it will enter dicontinuous transmission mode, means simply stopping to=20 transmit as there's nothing but silence we had to send to the other end. So the actual pitch is irrelevant. Any kind of noise will do, as long as it= 's=20 loud enough. cheers jOERG --nextPart2040401.nsPl7GbSpd Content-Type: application/pgp-signature; name=signature.asc Content-Description: This is a digitally signed message part. -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.4-svn0 (GNU/Linux) iD8DBQBImD5g7Xtwhpk1UgwRAnQzAKCNU2QWrLiRWGrjDIUW1Ukgb/hx7gCfXoJK jK81ALWvs/Wi679adIpguP4= =qsd5 -----END PGP SIGNATURE----- --nextPart2040401.nsPl7GbSpd-- --===============0576034371== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ support mailing list support@lists.openmoko.org https://lists.openmoko.org/mailman/listinfo/support --===============0576034371==-- ]