
ZvBox®170ConfigurationManual Page4
www.zeevee.comRev1.0
CompensatingforcroppedvideofromVGAsources
MostDigitalTelevisionscropoffsomeportionofthepictureattheoutsideedges;thephenomenonis
knownasoverscan.Forexample,eveniftheyreceiveanimagethat’s*exactly*1280x720pixels,TVs
maycropoffupto15%oftheimagebeforedisplayingit!SomeTVsallowyoutocontrolthis(lookfor
settinglike“Unscaled”or“Native”inthePicturemenusettings).Mostdonotletyouoverrideit.
ComponentVideosourcesaren’tterriblyaffected;they’vealwaysbeendesignedtobedisplayedonTVs
thatmightcropoffaportionofthepicture.Contentisspeciallydesignedtokeepimportantinformation
insideofa‘safearea’.Thereisnoneed(andnoability)toadjustthesourcetobetterfittheTV–you’ll
simplyseealittlemorepictureononeTVvs.another.
VGAsourcesarequiteadifferentmatter.Theseareusuallycomputerimagesthathaveimportant
informationattheedgesofthescreen:
•WindowshasaStartbuttonandthetaskbarrightontheedge.
•Applehasadockontheedge.
•Digitalsignageapplicationstypicallyputatextcrawlontheedge.
Anycroppingoftheimagemaycauseimportantinformationtobelost.ZeeVeehasdevelopeda
patent‐pendingmechanismtohelpcompensateforthisbehavior.Bychangingtheinformation
presentedtothecomputerviaEDIDontheVGAconnection,wecangivethecomputeranalternate
“underscan”resolutionthat’salittlesmallerthanthedefault.AlthoughZvBox®shipswithadefault
underscanresolution,wealsoallowyoutooptimizethesettingstomatchtheexactbehaviorofyourTV.
Herearethestepsinvolved:
1. BroadcastaVGAsourcetoyourHDTV(s).NotewhichTVcropsoffthemost.
2. PresstheNextbuttonuntilthedisplayreads“SETVIDEO‐SOURCE”
3. Pressthe+or‐buttonuntil“Test‐Image‐1“appearson‐screen,thenpressOK
4. OntheTVthatcropsthemost,notethelargestresolutionthatisvisible.Itwilllooklikethis:
5. PresstheNextbuttonuntiltheSETVGA‐REScommandappearsinthewindow.
6. Press+or–buttonstoselectaresolutionthatisclosestto,butnotlargerthan,theoneyousaw
ontheHDTV(thatwillensurethattheentirepicturefitson‐screen).
7. PressOKtoapplythatresolution.
8. UnplugtheVGAcablefromyourcomputer,waitafewseconds,andreconnectit.Thereshould
nowbeanewresolutionavailableinyourcomputer’s“displayproperties”thatmatchesyour
setting.Selectit.YourVGAsource’spictureshouldnowperfectlyfitonyourHDTV.