The RF level attenuation setting of each enabled channel on the RF Port. Range is -300 to 800 representing -3 to 8 dB attenuation in 0.01 dB steps. (See 'Note' below.) Positive values are the amount below the nominal RF output level for the number of channels enabled on the RF Port. Negative values are the amount above the nominal. Number Nominal dBmV dBmV Channels dBmV W/-300 W/800 1 60 63 52 2 56 59 48 4 52 55 44 6 50 53 42 8 49 52 41 Note: Early APEX only supported attenuation. Gain was added later, hence the negative attenuation values for this parameter. For clarity, the APEX Element Manager display indicates 'RF Level Adjust', with a user selectable range of -8.00 to +3.00 dB, rather than 'Attenuation'. The APEX EM then sets this MIB parameter appropriately.