變更

==電視廣播==印第安人頭檢驗圖在1947年以後逐漸為[[美國]][[戰後嬰兒潮]]一代所熟知，它通常會在[[電視]]收播后跟隨著[[美國國歌]]出現。

其他已知使用過印第安人頭檢驗圖的國家 ， 還包括[[委内瑞拉]]和[[瑞典]]。

==電視廣播==印第安人頭檢驗圖 ， 在電視上十分常見：除了在一天收播后出現之外，在早晨6點開播前也會短暫出現在電視上；甚至會在早間出現在一些通常於10或11點才開始播出午間地區節目的低預算[[電視臺]]信號裏<ref name="RTVN1949">{{cite journal | last = Kay | first = M. S. | title = The Television Test Pattern | journal = Radio & Television News | volume = 41 | issue = 1 | pages = pp. 38–39, 135–136 | publisher = Ziff-Davis |date=January 1949}} "Every television station, prior to its actual broadcasting period, transmits a test pattern for the purpose of permitting set owners to adjust their receiver controls for optimum reception." The article also states that television programming (in 1949) was only a few hours each evening. The "Indian Head" test pattern was built into the RCA "Monoscope" tube, a 2F21, which acted as a complete replacement for the TV camera.</ref> 。