TV Explorer HD ATSC manual - Promax

USER’S MANUAL. TV EXPLORER HD ATSC5.13.2 ITU-T J.83/B (QAM Annex-B) Digital Channel ConfigurationPress the Measurements Configuration[17] key to access theCONFIGURATION menu and turn the rotary selector [1] until the SIGNAL option.Select the signal ITU-T J.83/B, which uses QAM-B modulation. Parameters related toQAM-B modulation that the user can set are described below:1) Spectral inversionIf necessary, activates the Spectral inversion (On). If the spectral inversion is notcorrectly selected, reception will not be correct.2) ModulationsIt defines the modulation type. When selecting this function and pressing the rotaryEnglishselector [1] a multiple-choice menu will appear on the screen, this menupermits to choose one of the following modulations: 64 or 256.Figure 20.- Screen of measurement configuration (QAM Annex-B signals).5.13.3 ATSC (8-VSB) Digital Channel ConfigurationPress the Measurements Configuration[17] key to access theCONFIGURATION menu and turn the rotary selector [1] until the SIGNAL option.Select the signal 8-VSB (ATSC). Parameters related to 8-VSB modulation that the usercan set are described below:1) Spectral Inv. (spectral inversion)This option enables spectral inversion to be applied to the input signal, though inthe majority of cases it should be in the OFF position (not inversion).03/2012 Page 43