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[111.69.236.136]) by mx.google.com with ESMTPS id ko6sm2759836igc.2.2012.03.17.16.30.05 (version=TLSv1/SSLv3 cipher=OTHER); Sat, 17 Mar 2012 16:30:06 -0700 (PDT) Mime-Version: 1.0 (Apple Message framework v1257) Content-Type: multipart/signed; boundary="Apple-Mail=_B2F2913B-368D-4A23-8817-CB5BEE9C3D3E"; protocol="application/pkcs7-signature"; micalg=sha1 From: Andrew McGregor In-Reply-To: Date: Sun, 18 Mar 2012 12:30:00 +1300 Message-Id: References: To: Dave Taht X-Mailer: Apple Mail (2.1257) Cc: thumbgps-devel@lists.bufferbloat.net Subject: Re: [Thumbgps-devel] antennas and such X-BeenThere: thumbgps-devel@lists.bufferbloat.net X-Mailman-Version: 2.1.13 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 17 Mar 2012 23:30:10 -0000 --Apple-Mail=_B2F2913B-368D-4A23-8817-CB5BEE9C3D3E Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=iso-8859-1 So extend the serial side. Serial cable is MUCH cheaper than RF cable. On 18/03/2012, at 7:20 AM, Dave Taht wrote: > I'm fully aware that adding an external antenna can blow the costs out > the window. However, getting a gps receiver with integral antenna to a > window is something of a problem. So far as I know 5 meters is the > outer limit without active regeneration of the signal. >=20 > = http://reviews.ebay.com/USB-Cable-Length-Limitations-and-how-to-break-them= ?ugid=3D10000000001067998 >=20 > I have no idea how usb 'active regeneration' works or if it can affect = latency. >=20 > So moving onto the antenna problem, I note that the length of a patch > antenna has a direct relationship as to the quality of it's signal, > so this is a determining factor as to the overall size of the dongle. >=20 > (this is a most-excellent manual, and has details that apply to all = gps designs) >=20 > = http://www.u-blox.com/images/downloads/Product_Docs/LEA-6_NEO-6_MAX-6_Hard= wareIntegrationManual_%28GPS.G6-HW-09007%29.pdf >=20 > There are also outboard antennas with varying features (like the > ability to be mounted oddly) and active antenna designs. I don't know > enough about the active antenna designs to know if they can be powered > by a usb source. >=20 > --=20 > Dave T=E4ht > SKYPE: davetaht > US Tel: 1-239-829-5608 > http://www.bufferbloat.net > _______________________________________________ > Thumbgps-devel mailing list > Thumbgps-devel@lists.bufferbloat.net > https://lists.bufferbloat.net/listinfo/thumbgps-devel --Apple-Mail=_B2F2913B-368D-4A23-8817-CB5BEE9C3D3E Content-Disposition: attachment; filename=smime.p7s Content-Type: application/pkcs7-signature; name=smime.p7s Content-Transfer-Encoding: base64 MIAGCSqGSIb3DQEHAqCAMIACAQExCzAJBgUrDgMCGgUAMIAGCSqGSIb3DQEHAQAAoIIFLjCCBSow ggQSoAMCAQICEQDMQ2ZKvgsUYA5oQg5SjWfVMA0GCSqGSIb3DQEBBQUAMIGTMQswCQYDVQQGEwJH QjEbMBkGA1UECBMSR3JlYXRlciBNYW5jaGVzdGVyMRAwDgYDVQQHEwdTYWxmb3JkMRowGAYDVQQK ExFDT01PRE8gQ0EgTGltaXRlZDE5MDcGA1UEAxMwQ09NT0RPIENsaWVudCBBdXRoZW50aWNhdGlv biBhbmQgU2VjdXJlIEVtYWlsIENBMB4XDTExMTAwMTAwMDAwMFoXDTEyMDkzMDIzNTk1OVowJTEj MCEGCSqGSIb3DQEJARYUYW5kcmV3bWNnckBnbWFpbC5jb20wggEiMA0GCSqGSIb3DQEBAQUAA4IB DwAwggEKAoIBAQC+buTRxzSXTQmMyUqaokLJit3xU5WVudxHijhKbGRSTgJ867L/v8+rNhSoFwCV MdKIu/M7apWgGkkA+MT/LjDFj63jLT+4nTTLIojXZdoezbpp/rQ2ViSbi54AjhZBQ5X+yH2xcXmG KpDhZjeZC1bvKNvBtdOHCAcrx1Ys1BNj+AhwridEX/KD0cq5xSsJhjDggF6XSUOsaiqBHR6fiQMi 7gH8EuFBh83oklb/pdreg1fQ7gKJk/Me/atIbE1gtbIR88oaCtXoHfZxgkFwagwMtBHdkxN+wcZy 9xx78el9Lxrjx2nMq50hRlj/bqg/m4rSox7//DKfx7bfKNZAiSMDAgMBAAGjggHkMIIB4DAfBgNV HSMEGDAWgBR6E04AdFvGeGNkJ8Ev4qBbvHnFezAdBgNVHQ4EFgQUXOXqNkq6sNbrD8B41dPko8Gs JucwDgYDVR0PAQH/BAQDAgWgMAwGA1UdEwEB/wQCMAAwIAYDVR0lBBkwFwYIKwYBBQUHAwQGCysG AQQBsjEBAwUCMBEGCWCGSAGG+EIBAQQEAwIFIDBGBgNVHSAEPzA9MDsGDCsGAQQBsjEBAgEBATAr MCkGCCsGAQUFBwIBFh1odHRwczovL3NlY3VyZS5jb21vZG8ubmV0L0NQUzBXBgNVHR8EUDBOMEyg SqBIhkZodHRwOi8vY3JsLmNvbW9kb2NhLmNvbS9DT01PRE9DbGllbnRBdXRoZW50aWNhdGlvbmFu ZFNlY3VyZUVtYWlsQ0EuY3JsMIGIBggrBgEFBQcBAQR8MHowUgYIKwYBBQUHMAKGRmh0dHA6Ly9j cnQuY29tb2RvY2EuY29tL0NPTU9ET0NsaWVudEF1dGhlbnRpY2F0aW9uYW5kU2VjdXJlRW1haWxD QS5jcnQwJAYIKwYBBQUHMAGGGGh0dHA6Ly9vY3NwLmNvbW9kb2NhLmNvbTAfBgNVHREEGDAWgRRh bmRyZXdtY2dyQGdtYWlsLmNvbTANBgkqhkiG9w0BAQUFAAOCAQEAgmf81vnsAnbcmIAyyqvEKxAK jRHerfreN10DK1ISkUJ//U4uffQV8sAGDtyIErzVFsW6NYRmFCMSE20M1ffbFpWUmXCtm/YTlkf1 5STVjTMNshDzMDhpjx99Z2J5RBJPZpXjwmpQnfKwB7zft9TcUSIb9FvZm33EKdF/XlS12U4Q9fsj 2shZf88RituX2+fCWfHoTWiFEhFUkLRtWf1YpgHpEXr82nqROxs/aWNlqtLnwTTu2ULr/WpUaRDs kom8gFZkMgw5kRfLpSXRrCFSORsZzkH2ooRxaJY7wMwZaCUS1am9DuwVy7gehoc3ZsjsDkMObZeu kx7Cg7GxIkgo+zGCA64wggOqAgEBMIGpMIGTMQswCQYDVQQGEwJHQjEbMBkGA1UECBMSR3JlYXRl ciBNYW5jaGVzdGVyMRAwDgYDVQQHEwdTYWxmb3JkMRowGAYDVQQKExFDT01PRE8gQ0EgTGltaXRl ZDE5MDcGA1UEAxMwQ09NT0RPIENsaWVudCBBdXRoZW50aWNhdGlvbiBhbmQgU2VjdXJlIEVtYWls IENBAhEAzENmSr4LFGAOaEIOUo1n1TAJBgUrDgMCGgUAoIIB2TAYBgkqhkiG9w0BCQMxCwYJKoZI hvcNAQcBMBwGCSqGSIb3DQEJBTEPFw0xMjAzMTcyMzMwMDFaMCMGCSqGSIb3DQEJBDEWBBTkzNjx FRVPGetgVJLALxv2mbkVhjCBugYJKwYBBAGCNxAEMYGsMIGpMIGTMQswCQYDVQQGEwJHQjEbMBkG A1UECBMSR3JlYXRlciBNYW5jaGVzdGVyMRAwDgYDVQQHEwdTYWxmb3JkMRowGAYDVQQKExFDT01P RE8gQ0EgTGltaXRlZDE5MDcGA1UEAxMwQ09NT0RPIENsaWVudCBBdXRoZW50aWNhdGlvbiBhbmQg U2VjdXJlIEVtYWlsIENBAhEAzENmSr4LFGAOaEIOUo1n1TCBvAYLKoZIhvcNAQkQAgsxgayggakw gZMxCzAJBgNVBAYTAkdCMRswGQYDVQQIExJHcmVhdGVyIE1hbmNoZXN0ZXIxEDAOBgNVBAcTB1Nh bGZvcmQxGjAYBgNVBAoTEUNPTU9ETyBDQSBMaW1pdGVkMTkwNwYDVQQDEzBDT01PRE8gQ2xpZW50 IEF1dGhlbnRpY2F0aW9uIGFuZCBTZWN1cmUgRW1haWwgQ0ECEQDMQ2ZKvgsUYA5oQg5SjWfVMA0G CSqGSIb3DQEBAQUABIIBAABMFS2EQ3n8sDgkH+uS5bCyFkxYI9kntJIpZNOeUe9ZhgvxYhChrm74 BfDTp01IK2zrRRqmuVYsG8XjnlFDJ7i7C/9RYCD046akc2/R+iivSZHQ4LfUn357ZJZwaQ42oYbT 4ppLlJi1lUh8wTDgdouOAqHraHSJPpoaOgw2mUxDv0jBHbjYz8/SncftPyxFl1gpFC/8PigbjM// oGEHXNTn3yH01zyna8JEL26jM5eA+WI8yWh7ZEpqQkLNmKdcutYfVCKwOibPuDdfg/sUXD1ZMaiH mqG2OFdDIac87KJ4eGD9XWoMui1ptwQbIuDHvAlLmiAUMQscDUDv/3YGMFsAAAAAAAA= --Apple-Mail=_B2F2913B-368D-4A23-8817-CB5BEE9C3D3E--