U fiirso qoraalka hoose ka dibna ka jawaab su'aasha kadib isla luqadda qoraalka:  Dhigashada: Heerka 59.94 waxaa laga soo qaatay xisaabinta soo socota. Naqshadeeyayaashu waxay doorteen inay ka dhigaan inta jeer ee subcarrier chrominance n + 0.5 oo ka badan inta jeer ee khadka si loo yareeyo faragelinta u dhexeysa signalada luminance iyo signalada chrominance. (Wadada kale ee inta badan la yiraahdo waa in inta jeer ee subcarrier midabku uu yahay mid aan caadi ahayn oo ka mid ah kala badh inta jeer ee khadka.) Kadib waxay doorteen inay sameeyaan inta jeer ee subcarrier audio inta jeer ee khadka si loo yareeyo faragelinta muuqata (intermodulation) ee u dhexeysa signalada maqalka iyo signalada chrominance. Heerka asalka ah ee madow iyo caddaan, oo leh 15,750 Hz iyo 4.5 MHz subcarrier audio, ma buuxin shuruudahan, sidaa darteed naqshadeeyayaashu waxay ku qasbanaadeen inay kordhiyaan inta jeer ee subcarrier audio ama ay hoos u dhigaan inta jeer ee khadka. Kordhinta inta jeer ee subcarrier-ka maqalka ayaa ka hortagi doonta qaataha jira (madow iyo caddaan) inay si sax ah u habaynayaan calaamadda maqalka. Hoos u dhigida inta jeer ee khadka waa mid aan waxyeello lahayn, sababtoo ah macluumaadka isku dheelitirka toosan iyo midka toosan ee signalka NTSC wuxuu u oggolaanayaa qaataha inuu u dulqaato tiro badan oo kala duwanaansho ah inta jeer ee khadka. Injineerada ayaa go'aansaday in ay bedelaan codadka si ay u badalaan midabada caadiga ah. Heerka madow iyo caddaanka, saamiga inta jeer ee subcarrier-ka maqalka ee inta jeer ee khadka waa 4.5 MHz / 15,750 Hz = 285.71. Halbeegga midabka, tani waxay noqoneysaa mid wareegsan oo ah tiro dhan 286, taas oo macnaheedu yahay heerka khadka ee heerka midabka waa 4.5 MHz / 286 ≈ 15,734 Hz. Haysashada tiro isku mid ah oo khadadka scan halkii goobta (iyo jir), heerka line hoose waa in ay keenaan heerka hoose goobta. Marka la qaybiyo 4500000⁄286 xariiq ilbidhiqsi kasta 262.5 xariiq ilbidhiqsi kasta wuxuu helayaa qiyaastii 59.94 ilbidhiqsi kasta.  Su'aal: Waa imisa saamiga la qeybin karo oo la qiyaasi karo oo ku saabsan xaddiga meelaha la qeybin karo ee halkii ilbiriqsiba?
59 iyo 94