Last updated: 20 May 2005
Subject: PE series LNT Summary (Update) Sent: Friday, May 20, 2005 05:54:53 From: firstname.lastname@example.org (email@example.com) Thanks to inputs from the knowledgeable folks that visit your site, particularly Dick Seymour, I have some corrections as to how the LNT module determines Level, North and Tilt. The component I thought was a magnetic sensor array is actually a 2-axis accelerometer that is sensitive to the static acceleration of Earths gravity. This is used to determine Level and Tilt. North is determined by a magnetometer that changes state when the sensor coil becomes perpendicular to the local magnetic field. This signal is used by the AutoStar to set the Az axis to 0 deg. at that point. Any corrections previously determined by a Cal Sensors procedure are then applied. The overall functionality of the LNT is pretty much as I described before and this update is basically for technical accuracy. Attached are views of the LNT board showing the major components.
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