 | Reference Level The reference level is the top graticule line on the display, and can be set from –50 dBm to –140 dBm. A value may be entered from the keypad, use the ± key for a minus sign. After entering the value press the dBm submenu key or the Enter key. The Up/Down arrow keys change the reference level in 10 dB steps, and the Left/Right arrow keys change the value by 1 dB. Scale The scale can be set in 1 dB steps from 1 dB per division to 15 dB per division. The value can be changed using the keypad or the Arrow keys. Units dBm dBc Toggles the measurement display units between dBm and dBc. The amplitude for upper and lower limits automatically adjusts to the equivalent level for the selected units. |