Klark Teknik HELIX DN9848E, Operator'S Manual

Page: 22 / 52

Output Channels
14
6.2.3 Signal Invert, Delay and Output Level (Page 2)
Each output can be phase inverted by 180
º
(separate to the phase-alignment for
crossover), delayed for system alignment and
the level attenuated or boosted.
Delay can be specified in terms of time or
distance, as preferred. The unit of
measurement is changed in the Set Up menu
(see Section 7.9).
The Level entered here sets the baseline
output level, that is, the ‘zero’ value, for the
rotary Output Gain controls. For example, if
the Level is set to 6dB, the 0 represents 6dB. Turning the rotary Gain Control right/left will
increase/decrease the level in a proportional manner beyond 6dB (it is not directly additive since the
gain is limited to +12dB). Hence, the Output Gain controls enable fine-tuning during a performance,
while the baseline output level is retained as a standard setting for future use.
To invert the output signal
Turn the left
DATA ENTRY
control knob clockwise until the Invert field reads “Yes”. The default
setting is “No” inversion.
To set the delay
Turn the centre
DATA ENTRY
control knob slowly for step increments, or sharply to leap to the
bottom/top of the range (one or two sharp turns should cover the whole range). When the
delay is set for time the overall range is 0 to 300.00ms, with steps of approximately 5.2 µ s
between 0 to 1ms and steps of 0.01ms between 1ms to 300ms. When the delay is set for
metres the overall range is 0 to 103.06 m in steps of 0.1 m and for imperial (feet and inches)
the overall range is 0’ 0” to 338’ 0” in steps of 1”.
To set the base level for the front panel Gain control
Turn the right
DATA ENTRY
control knob. The range is –40dB to +12dB in steps of 0.1dB, with
an OFF position just ‘below’ –40dB. Setting the gain to OFF will mute the input signal.
6.2.4 Phase Adjustment (Pages 3 and 4)
To meet the demands of a wide range of situations, the Klark Teknik DN9848E provides two all-pass
filters with complementary control parameters for fine-tuning the phase response on each output, for
example, for alignment at crossover. The first filter is presented as a ‘phase shifter’ for which you
can set a specific phase shift at a reference frequency , for example, the HPF or LPF (typically the
crossover point). The second filter enables a 1
st
or 2
nd
order phase shift to be applied at a chosen
frequency . With 2
nd
order, the phase shift window can be shaped, that is, you can adjust the
steepness of the transition by setting the Q value.
For detailed information on how these filters modify the signal, please refer to Section 10 “Application
Notes”.
Delays can be set in seconds,
metres or feet
Sets the baseline for the
rotary Output Gain control