Application Notes
10.2. Phase-adjustment with the DN9848
To meet the demands of a wide range of situations, the Klark Teknik DN9848 provides two
The first filter of the DN9848 is presented as a “phase shifter” for which you can specify a particular phase shift at a reference frequency, namely a HPF or LPF (typically the
Audio Precision |
| 90 deg phase shift @ 20, 300, 1K, 20K |
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| +150 |
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| +50 |
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d | +0 |
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e |
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Color | Line Style | Thick | Data | Axis |
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Green | Solid | 1 | Anlr.Phas e | Left |
Yellow | Solid | 1 | Anlr.Phas e | Right |
Yellow | Solid | 1 | Anlr.Phas e | Left |
phas e.at1
Response of the phase shifter filter for a phase shift of 90 at reference points equivalent to 20Hz, 300Hz, 1kHz and 20kHz
The second filter, presented to the user as an
The graph over the page shows the response of the filter for a 1st order shift. In this mode, the Q control is disabled. As can be seen, the filter behaves in an identical manner to the phase shifter, i.e. the response tends from +180 at low frequencies to 0 at high frequencies, shifted along the frequency axis according to the chosen frequency. In effect, this is a phase shifter for which the frequency is entered directly, rather than being referred to a HPF/LPF or PEQ section.
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