Texas Instruments TI-Nspire CX Navigator 4.2 Installation guide

Teacher'FAQ'for'TI-Nspire™!CX#Navigator™"4.2"
What%is%the%wireless%technology%used%in%the%TI-Nspire™%CX%Navigator™%classroom%system?%
The$TI-Nspire™$Navigator™$classroom$system$uses$Wi-Fi$wireless$technology$to$connect$the$TI-Nspire™$handhelds$to$the$
access$point$(AP).$This$is$the$same$technology$used$in$home$wireless$routers$and$other$electronic$devices$like$laptops$
and$smartphones.$
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What%is%the%recommended%configuration%(application%version,%TI-Nspire™%CX%handheld%OS%release,%etc.)%for%my%TI-
Nspire™%CX%Navigator™%classroom%system?%
You$should$have$version$4.2$of$the$TI-Nspire™$Navigator™$desktop$application$and$version$4.2$of$the$OS$on$the$TI-
Nspire™$handhelds.$Note:$Once$the$TI-Nspire™$handhelds$have$been$updated$to$4.2,$they$cannot$be$downgraded$to$an$
earlier$version.$
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Some%of%my%students%get%the%“Communication%failed.%Check%the%connection”%error%message%when%they%try%to%log%in.%
What’s%causing%this?%
Please$ensure$that$the$AP$is$plugged$in$and$detected$by$the$TI-Nspire™$CX$Navigator™$desktop$software$and$that$you$
have$started$a$class$before$the$students$attempt$to$log$in.$$Also,$confirm$that$the$connection$between$the$TI-Nspire™$
handheld$and$the$wireless$client$(wireless$network$adapter)$is$secure.$
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Some%of%my%handhelds%have%disconnected.%What%should%I%do?%
The$handhelds$will$sometimes$disconnect$from$the$network$but$they$should$attempt$to$re-connect$on$their$own.$This$is$
similar$to$what$happens$in$your$home$when$your$computer$temporarily$disconnects$from$the$wireless$router.$In$case$
the$handhelds$don’t$reconnect$within$30$seconds,$please$attempt$the$following$steps:$
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1. To$connect$to$the$desired$network$on$the$handheld,$press$the$following$sequence$‘Home$button$>$Choose$
“Settings”$(5)$>$Choose$“Network”$(6)’$menu.$If$you$don’t$see$the$network$name$in$the$list,$please$click$on$the$
‘Refresh’$button$in$the$Select$Network$dialog.$$It$may$take$up$to$a$minute$for$the$TI-Nspire™$CX$handhelds$to$
see$and$connect$to$the$network.$
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2. If$the$first$step$fails,$remove$the$wireless$client$from$the$handhelds$and$wait$60$seconds.$Re-attach$the$wireless$
client$and$the$handheld$will$begin$searching$for$a$wireless$network.$$Once$the$handheld$shows$the$blinking$
Navigator$symbol$in$the$upper$right$corner,$students$can$log$in$to$the$active$class$session.$
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3. If$the$first$two$steps$fail,$please$reboot$the$TI-Nspire™$handheld$by$pressing$the$recessed$‘Reset’$button$at$the$
back$of$the$TI-Nspire™$handheld.$Some$teachers$find$a$paper$clip$the$easiest$way$of$pushing$the$Reset$button.$$
Note:&The&student&will&have&to&re-login&after&the&handheld&reboots&and&connects&to&the&network.&
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None%of%my%handhelds%are%connecting.%What%do%I%do?%
If$none$of$the$handhelds$are$connecting$within$two$minutes$of$startup,$please$reboot$the$AP$by$performing$the$
following$steps:$$$
1. Unplug$the$USB$cable$from$the$computer.$
2. If$you$have$the$AP$with$the$external$power$adapter,$remove$the$power$adapter$from$the$AP.$
3. Wait$about$10$seconds.$
4. Re-attach$the$power$adapter$(if$necessary)$to$the$AP$and$the$USB$cable$to$the$PC.$
5. The$handhelds$will$start$connecting$in$about$two$minutes.$
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I%was%told%to%change%the%channel%of%my%AP%in%case%of%connection%issues.%Can%I%pick%any%channel%(from%1%to%11)%from%the%
list?%
If$your$school$has$a$wireless$network,$please$work$with$your$IT$team$to$ensure$that$the$channels$used$by$your$TI-
Nspire™$Navigator™$system$co-exist$well$with$that$network.$
Even$though$the$AP$supports$all$channels$from$1$to$11$at$2.4$GHz,$it$is$recommended$that$you$configure$the$AP$to$only%
use%channels%1,%6%or%11.$Due$to$the$way$the$channels$are$assigned,$using$other$channels$may$result$in$reduced$
performance.$
If$you$are$using$the$newest$TI-Nspire™$CX$Navigator™$access$point$and$the$TI-Nspire™$CX$Wireless$Network$Adapters$v2$
you$have$the$option$to$change$the$frequency$band$from$the$5GHz$band$(default)$to$2.4$GHz.$$The$operating$channels$for$
the$5GHz$frequency$are$36$(default),$40$44,$48,$52,$149,$153,$157,$161,$165.$$$
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Note:$$The$default$frequency$band$on$the$new$TI-Nspire™$CX$Navigator™$access$point$is$5GHz.$The$CX$Wireless$
Network$Adapters$v2$are$the$only$TI-Nspire™$wireless$clients$that$can$connect$to$the$AP$when$it$is$operating$on$
the$5GHz$band.$$$
Some%of%my%TI-Nspire™%handhelds%disconnected%after%not%being%used%for%some%time.%What’s%going%on?%
The$TI-Nspire™$handhelds$disconnect$from$the$wireless$network$after$60$minutes$of$inactivity.$This$is$done$to$preserve$
the$rechargeable$battery$in$the$handheld.$You$will$need$to$press$the$‘ON’$button$on$the$TI-Nspire™$handheld$to$re-
connect$the$TI-Nspire™$handheld$to$the$network.$
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My%AP%gets%disconnected%during%normal%use.%What%can%I%do%to%avoid%this?%
Please$change$the$power$settings$on$your$computer$to$disable$‘hibernate’$during$normal$use.$If$you$need$help$with$
updating$your$PC$configuration,$please$contact$your$IT$department.$
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What%other%things%do%I%need%to%know%about%the%new%TI-Nspire™%CX%Navigator™%access%point?%
The$new$TI-Nspire™$CX$Navigator™$access$point$has$a$few$differences$from$the$earlier$models$of$TI-Nspire™$access$
points.$
•The$new$AP$does$not$have$a$separate$power$adapter$–$it$uses$the$USB$connection$for$power.$This$means$that$it$
starts$the$‘boot’$process$after$it$is$plugged$into$the$PC$and$won’t$be$available$for$use$for$about$30$seconds$after$
the$USB$cable$is$connected.$
•Since$the$AP$does$not$connect$to$a$separate$power$source,$it$is$important$for$the$AP$to$be$connected$directly$to$
your$computer.$$It$should$NOT$be$connected$to$the$handheld$via$an$external$hub.$
•The$internal$antenna$in$the$new$AP$has$the$same$range$as$the$other$AP.$However,$during$classroom$use$please$
ensure$that$that$AP$is$not$behind$a$monitor$or$other$electronic$equipment.$Whenever$possible,$try$to$maintain$a$
clear$line$of$sight$between$the$AP$and$the$handhelds.$
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I%have%a%question%that%hasn’t%been%answered%in%this%document.%What%do%I%do?%
Please$contact$TI’s$customer$support$at$1.800.TI.CARES$or$visit$the$online$Knowledge$Base$at$
http://epsstore.ti.com/OA_HTML/cskmbasicsrch.jsp.$$
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