RIGOL DSA875 - Manual (Page 13)

RIGOL
DSA800 Options and Accessories 9
2. ACP
Measure the powers of the main channel and adjacent channels as well as the
power difference between the main channel and each of the adjacent channels.
When this function is enabled, the span and resolution bandwidth of the
analyzer are adjusted to smaller values automatically.
3. Chan Pwr
Measure the power and power spectral density within the specified channel
bandwidth. When this function is enabled, the span and resolution bandwidth
are automatically adjusted to smaller values.
Main Channel Bandwidth
Adjacent Channel Bandwidth Channel Spacing