SporTrak Color GPS M apping R eceiver
73
Appendix
7. Stand t he SporT rak Color up wit h the
displa y facing y ou and t he ant enna
pointing up. Hold t he r eceiv er s teady and
wait f or t he beep.
8. Turn t he SporT rak Color o ver . Now t he
ant enna is pointing do
wn and t he bac k of
the SporT rak Color is f acing y ou. Hold t he
receiv er s teady and w ait f or t he beep.
9. Place t he SporT rak Color f ace do wn wit h
the ant enna pointing t owards y ou. W ait f or
the beep.
This will conclude t he e xtended calibr ation and y ou will be pr om pted t o per form t he basic
calibration again.
Limitations to the E
lectronic Compass
The electr onic com pass has some limit
ations as t o ho w w ell it w ork s in cer tain en viron-
ments. Larg e me tal objects can af
fect ho w w ell it oper ates. As an e xam ple, should y ou use
your SporT rak Color in an aut omobile y ou will f ind t hat t he com pass does a g
reat job of
pointing t o y our engine but no
t pointing t o nor th. If y ou f ind y our self in a situation
suc h as t his, y ou should use t
he Se tup op tion “Com pass Or ient. ” to c hang e t he com pass
orient ation t o GPS Cour se. Then t he SporT rak Color will g e t its heading fr om t he GPS
signals and no
t the electr onic com pass.
Other limit ations ar e in t he angle t hat y ou hold t he SporT rak Color . Holding t he r eceiv er
flat pr ovides t he mos t accur ate r eadings. While tilting it t
owards y ou is accep table, y ou
should pa y att ention t o t he com pass r eadings as y
ou tilt it. A t a cer tain point, y ou will
begin t o see t he com pass begin t o dr ift. The SporT rak Color has com pensat ed f or tilt, but
the mor e y ou tilt it, t he mor e y ou will no tice err ors in t he com pass r eadings.
The SporTrak Color has a ma
jor adv ant ag e o ver man y o ther electr onic com passes on t he
mark e t toda y in t hat it can be tilt ed and s till maint ain r elativ el y accur ate com pass
readings.
Batter y consum ption incr eases whene
ver t he com pass is oper ating, t her ef ore im pacting
batt er y life. The com pass is oper ating an y time heading is being displa
yed. So, natur all y,
while y ou ar e on eit her of t he tw o com pass scr eens or on t he Map Scr een (y our position
cur sor is pointing t o y our heading), t he com pass is running. On t
he o ther na vig ation
scr eens, t he com pass is of f unless y ou ha ve select ed heading f or one of t he dat a f ields.
Howe ver , you could go t o Se tup and wit h the “Com pass Or ient. ” op tion c hang e t he
orient ation of t he com pass t o “GPS Cour se” but t hat w ould def eat one of t he r easons y ou
choose t he SporT rak Color .