 | Mode, GI Press this submenu key to open the Select Mode, GI list box. Scroll through the list to select the Mode (number of subcarriers) and the size of the Guard Interval (GI). For more information about Mode or Guard Interval, refer to 2K, 4K, 8K Modes and Guard Intervals, and Digital Television Signal Analyzer Technology. Modulation Press this submenu key to open the Select Modulation list box. Scroll to select QPSK, 16QAM, or 64QAM modulation. The Hierarchy, Alpha parameter is set to None automatically by selecting QPSK. Hierarchy, Alpha Press this submenu key to open the Select Hierarchy, Alpha list box. Scroll to select None, 1, 2, or 4. The selection is displayed on the submenu key face. This selection is used to shape the 16QAM and 64QAM constellations. A value of α=1 describes an equally-spaced constellation. Spectrum Reverse On Off Press this submenu key to toggle the Spectrum Reverse feature On and Off. Use Spectrum Reverse to measure the signal whose sub carrier location is inverted on the frequency axis, such as the IF signal of the transmitter. Antenna (Correction Level) Press this submenu key to open the Select Antenna list box. Select the Anritsu antenna model number that corresponds to the antenna in use. If the model number of the antenna that is in use is not on the list, then select None. Back Press this submenu key to return to the Meas Setup (1/2) Menu. |