Specifications

2.6 FIL TER CHAR AC TER IS TICS
2.6.1 Am pli tude Re sponse
Each chan nel of the Model 3380 can op er ate in ei ther the low-pass or high-pass mode at 48dB/oc tave at ten u a tion and
pro vide ei ther max i mally flat (Butterworth) am pli tude re sponse or lin ear phase (Bessel) op er a tion. Com par a tive am pli -
tude re sponse char ac ter is tics in both modes are shown in Fig ure 2.2A and 2.2B.
2.6.2 Phase Re sponse
Phase char ac ter is tics of the Model 3380 is shown in Fig ure 2.3. The graph of the fil ter re sponse pro vides out put phase
rel a tive to the in put over a 10:1 fre quency range.
Section 2 - Operation Model 3380 Series
2-6
Figure 2.2B High-Pass Amplitude Response
Figure 2.2A Low-Pass Amplitude Response