### Instruction:

Extract the cause and effect entities from the following sentence:
The specified spectral width, Δλ0 will be different from the actual spectral width, Δλs, of a spectral channel, where the actual spectral width has traditionally been defined as the Full Width Half Maximum value of the spectral response function, ignoring local oscillations in the passband

### Assistant:

VARIABLE: the actual spectral width
CONDITION: ignoring local oscillations in the passband
KEYWORD: where
EFFECT_1: The specified spectral width, Δλ0 will be different from the actual spectral width, Δλs, of a spectral channel
CAUSE_1: the actual spectral width has traditionally been defined as the Full Width Half Maximum value of the spectral response function
CAUSE_2: ignoring local oscillations in the passband

