User guide

Specifications
INSTALLATION AND USER GUIDE 15
Video module: VGA-TX
TheVGA‐TXmoduleisessentialforsystemsthatstillcontainoneormoreanalogsources,alongwithmodern
digitalsources.Bothtypesofvideo(analoganddigital)cancoexistandthusminimizecapitalequipmentcosts
byextendingthelongevityofexistingvideosources.ThisisespeciallyimportantwhenusingVoyager
extension
technologytogetherwithavideoswitchingsystemsuchastheVG‐Matrixswitch.
TheVGA‐TXmoduleacceptsawiderangeoflegacyanalog‐videosignalformats:
 VGA(RGB+HV)video,typicallyfromPC’sandMAC’s.
 Compositevideo(NTSC/PAL).
 Componentvideo(YUV/YPbPr).
 Y/C(S‐Video).
These
videostandardscanbeinputatvarietyofresolutionsandrefresh‐rates.Theyarerecognized
automatically–nouserconfigurationisrequired.Allinputvideoformatsarescaledto1920x1080resolution
andaspectratiosareconvertedto16:9usinganon‐linearalgorithm.PleaserefertoAppendix‐Fforan
explanation
ofthisalgorithm.
Therearenouser‐configurableoptionswithregardstotheoperationoftheVGA‐TXmodule.However,thereis
an“auto‐adjust”functionwhichisapplicabletoVGAinputsonly(notcomponent/composite/S‐video).The
auto‐adjustisinvokedsimplybypressingtheF2buttononthefront
oftheCOREmodule.
Intheeventthatmultiplevideosourcesareappliedsimultaneously,thefirmwareadoptsastrategyofscanning
foravalidvideosignalateachport,andautomaticallyselectingthe“highestlikelyquality”porttodisplay,in
thisorder:
1. VGA(potentiallythehighestquality)
2. Component (YUV/YPbPr)

3. Y/C(S‐video)
4. Composite(NTSC/PAL)(potentiallythelowestquality).
Ifanactivevideosourceisremoved,thefirmwareautomaticallyselectsthenext‐best‐qualityinputsignal,ifany
exists.Toreturntoa“higherquality”signal,connectthe“higherquality”signalandresetthetransmitter(cycle
power).
NOTE:OnsomeVGA‐TXunits,thecolorsontheRCAjacksmaybedifferentthanshownhere.However,the
functionalitylabeledontheenclosuresilkscreen(Pb,Y,Pr,andComp)isstillcorrect.