Owner manual

20
TH7899M
2201A–IMAGE–02/02
PreliminaryImage
GradeSpecifications
Imagequalitygradesareavailable:
• GradeH,orderingcodeTH7899MCRH
• GradeT,orderingcodeTH7899MCRT
• GradeE,orderingcodeTH7899MCRE
Theseimagequalitygradesareguaranteedat25°Candprovideagoodimageforappli-
cationsatambienttemperature.
Operatingtemperaturerange:0°Cto=70°C.
BlemishDefinition • Column:
Itisonepixelinwidthand≥7pixelhighdefectwhoseheightisconstantwithlight
level.
•Blemish:
Thereareusuallythreetypesofblemishes:
– Whitedefect,dependentontemperature,asdarksignal:itsamplitude
doublesforevery8to10°Ctemperaturerise.
– Blackdefect,notdependentontemperature,butwhoseamplitudeis
proportionaltothemeanoutputvoltage.
Whitedefectsarespecifiedindarkness,at+25°C
Blackdefectsarespecifiedunderillumination,asapercentageofmeanillumination
uptoVSAT/2minindependentlyoftemperature.
Trapsarespecifiedasdefects(white+black)indarkness,at+25°C.
ImageGrade
Specifications
αistheamplitudeofvideosignalofblemishes.
Eg:20%<α
Foramplitude<20%,pixelisnotablemish.
Z1isasquarearea,whosesideishalfoftheheightoftheimagezone,centeredinthe
imagezone.
Z2istherestoftheimagezone.
ImagegradeismeasuredonVOSoutputsignal,with4outputsoperatingmode(1sinte-
grationtimeindarkness,100kHzverticalfrequencyand5MHzhorizontalfrequency).
Illuminationconditions:3200KHalogenlamp+BG38filter+F/3.5.
HGrade
Z1 Z1+Z2
Type(WhitetoBlack)
Whitedefectsin
darknessat25°C
DefectsatVSAT/2
Whitedefectsin
darknessat25°C
DefectsatVSAT/2
Pixelsaffectedbyblemishes
Areamaximum(pixels)
Amplitudeα
30
2x2
150
2x2
α>40mV 20%<|α| α>40mV 20%<|α|
Columnnumbermaximum
Amplitudeα
0
α>2mV
0
10%<|α|
0
α>2mV
0
10%<|α|