+ <section>
+ <title>Maximum Flight Log Size</title>
+ <para>
+ This sets the space (in kilobytes) allocated for each flight
+ log. The available space will be divided into chunks of this
+ size. A smaller value will allow more flights to be stored,
+ a larger value will record data from longer flights.
+ </para>
+ <para>
+ During ascent, TeleMetrum records barometer and
+ accelerometer values 100 times per second, other analog
+ information (voltages and temperature) 6 times per second
+ and GPS data once per second. During descent, the non-GPS
+ data is recorded 1/10th as often. Each barometer +
+ accelerometer record takes 8 bytes.
+ </para>
+ <para>
+ The default, 192kB, will store over 200 seconds of data at
+ the ascent rate, or over 2000 seconds of data at the descent
+ rate. That's plenty for most flights. This leaves enough
+ storage for five flights in a 1MB system, or 10 flights in a
+ 2MB system.
+ </para>
+ <para>
+ The configuration block takes the last available block of
+ memory, on v1.0 boards that's just 256 bytes. However, the
+ flash part on the v1.1 boards uses 64kB for each block.
+ </para>
+ <para>
+ TeleMini has 5kB of on-board storage, which is plenty for a
+ single flight. Make sure you download and delete the data
+ before a subsequent flight or it will not log any data.
+ </para>
+ </section>
+ <section>
+ <title>Ignite Mode</title>
+ <para>
+ TeleMetrum and TeleMini provide two igniter channels as they
+ were originally designed as dual-deploy flight
+ computers. This configuration parameter allows the two
+ channels to be used in different configurations.
+ </para>
+ <itemizedlist>
+ <listitem>
+ <para>
+ Dual Deploy. This is the usual mode of operation; the
+ 'apogee' channel is fired at apogee and the 'main'
+ channel at the height above ground specified by the
+ 'Main Deploy Altitude' during descent.
+ </para>
+ </listitem>
+ <listitem>
+ <para>
+ Redundant Apogee. This fires both channels at
+ apogee, the 'apogee' channel first followed after a two second
+ delay by the 'main' channel.
+ </para>
+ </listitem>
+ <listitem>
+ <para>
+ Redundant Main. This fires both channels at the
+ height above ground specified by the Main Deploy
+ Altitude setting during descent. The 'apogee'
+ channel is fired first, followed after a two second
+ delay by the 'main' channel.
+ </para>
+ </listitem>
+ </itemizedlist>
+ </section>
+ <section>
+ <title>Pad Orientation</title>
+ <para>
+ Because it includes an accelerometer, TeleMetrum is
+ sensitive to the orientation of the board. By default, it
+ expects the antenna end to point forward. This parameter
+ allows that default to be changed, permitting the board to
+ be mounted with the antenna pointing aft instead.
+ </para>
+ <itemizedlist>
+ <listitem>
+ <para>
+ Antenna Up. In this mode, the antenna end of the
+ TeleMetrum board must point forward, in line with the
+ expected flight path.
+ </para>
+ </listitem>
+ <listitem>
+ <para>
+ Antenna Down. In this mode, the antenna end of the
+ TeleMetrum board must point aft, in line with the
+ expected flight path.
+ </para>
+ </listitem>
+ </itemizedlist>
+ </section>