1
ASTRO-PHYSICS
GTO KEYPAD
Version 4.17 Addendum
Plus Supplemental Information for Customers Outside of North America
and the Revised GTO Quick Star Drift Method of Polar Alignment
KEYPAD VERSION 4.17
Version 4.17 Release Notes - 10-20-08
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Version 4.17 replaces v.4.16 from 7-7-08 which had a bug that caused occasional random freeze-ups during
initialization of the mount, especially when resuming from Reference Park 1.
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Version 4.16 replaced v.4.15 from 3-24-08 which had a bug that only affected older keypads – Serial numbers
1490GTO and earlier.
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Eastern Longitudes
●●●The●accuracy●of●eastern●longitude●values●that●are●sent●to●the●mount●has●been●improved●by●
including●minutes●in●the●calculation.●●●We●are●unable●to●add●seconds●into●the●calculation●at●this●time,●due●to●memory●
space●limitations●in●the●keypad.
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Eastern Time Zones When Polling the Mount
●●●●The●3=Get●Time/Loc●FrMnt●command●(how●you●“poll”●the●mount)●
now●returns●correct●time●zone●values●for●people●in●eastern●longitudes●using●the●GTOCP3●control●box.●●(GTOCP1●&●2●
control●boxes●already●returned●the●correct●time●zone●values●in●version●4.12●and●continue●to●do●so●in●version●4.16)
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Shipping Notice
●●●●Because●these●changes●only●applied●to●eastern●longitudes,●a●small●number●of●keypads●with●v.4.12●
were●shipped●to●US●addresses●after●the●March●24,●2008●introduction●of●v.4.15.●●●A●larger●number●of●keypads●were●
also●shipped●with●v.4.15,●which●contained●a●bug●that●only●affected●older●keypads●(S#1490●and●earlier).●●●Because●this●
bug●only●affected●older●keypads,●it●was●of●no●consequence●to●these●new●keypads.●●●That●bug,●however,●was●fixed●
with●v.4.16●which,●unfortunately,●had●its●own●problem●during●initialization.●●Keypads●shipped●between●March●and●
CONTENTS
KEYPAD●VERSION●4.17●
1
Version●4.17●Release●Notes●-●10-20-08●
1
Special●Notice●to●Mach1GTO,●1600GTO●and●3600GTO●Owners●
2
Summary●of●Remaining●Keypad●Issues:●
2
Eastern●Longitude●Values●●
2
Western●Longitudes●with●Eastern●Time●Zones●●
3
Incorrect●GMT●Offsets●When●Polling●the●Mount●from●the●Keypad●●
3
Western●Longitudes●at●Time●Zone●Zero●●
3
Eastern●Longitudes●and●Time●Zone●12●●●●
4
Eastern●Longitude●Limit●●
4
The●International●Date●Line●●●●●
4
Fractional●Time●Zones●●●●
4
COMMAND●LANGUAGE●/●TROUBLESHOOTING●UPDATE●
4
Motor●Stalls●in●GTOCP1●and●GTOCP2s●with●the●E1●or●KE1●Chip●
4
Horizon●Check●in●the●Servo●
5
Variable●Tracking●
5
REVISED●GTO●QUICK●STAR●DRIFT●METHOD●OF●POLAR●ALIGNMENT●●
6
GTO●Quick●Star●Drift●Method●of●Polar●Alignment●Quick●Reference●Sheet●
10
December●18,●2012
