HK Audio DSM 2060 - Manual (Page 6)

DSM 2060 Manual 1.0
3 Rear Panel
Power Inlet
The DSM 2060 unit should be connected to a
suitable mains electricity supply using the cable
supplied. The processor has a switch mode power
supply that is capable of operating with a nominal
mains voltage of 85V to 240V, 50/60Hz without
re-configuration.
Expansion Port
Where a future option card can be fitted.
Secure Button
A momentary button is fitted behind the rear
panel, between the output XLRs and the RS232
port. When activated, this will disable all the front
panel controls so they cannot affect the signal
path, making the unit secure against tampering.
When in secure mode, the indicators still operate
normally. Note that the communications port is
still active in secure mode.
Audio Input Connectors
All audio connections are fully balanced and wired
pin-1 ground, pin-2 hot & pin-3 cold. The two
inputs have pin-1 connected directly to the chassis
and feed the signal processing chains. If an
unbalanced source is used, a connection should
be made between the pin-3 ‘cold’ signal and the
ground connection of the unbalanced source.
Audio Output Connectors
The processed outputs are impedance balanced,
and wired pin-1 ground, pin-2 hot and pin-3 cold.
An unbalanced input may be driven by connecting
pin-3 ‘cold’ signal to the ground connection of the
unbalanced destination input. Note that output
pin-1’s are ground lifted at audio frequencies but
connected to ground at RF for good EMC perfor-
mance. The intention being that the amplifiers
the processor is driving should be responsible for
the grounding of their input cable shields.
Communications Port Connector
The DSM 2060 may be controlled entirely from
another controller, typically a Personal Computer,
running an application that is compliant with the
ObCom standard. Connection will normally be
made to the controller via this serial port
connector. This port is also used for updating the
firmware in the unit.
Note that the communications port is NOT
disabled when the front panel is made secure
using the secure button.
4 Operation
Starting up
The unit will energise as soon as power is applied
to the IEC inlet; there is no power switch. During
the start up process the firmware application
model number and version numbers are displayed
and the outputs are muted until the unit has
completed its internal checks. Once the start-up
routines are complete and the unit is ready to
pass audio. The DSP signal path will be restored
to the current settings when it was last powered
down and the audio signal is gradually ramped up
to its correct level.
Selecting a Factory Preset
The DSM 2060 has got a library of Factory Presets
designed to suit a range of applications.
Factory Presets contain some parameters that are
fixed and hidden from view; the remainder of the
DSP parameters are available for user manipulati-
on. The number and type of hidden parameters is
dependant on the Factory Preset, typically cross-
over frequencies, output delay and some EQ’s are
hidden; those settings that are a function of the
loudspeaker cabinet design and should not
require adjustment for different applications.
To recall a Factory Preset for a particular cabinet
or system, press Recall and use the left hand
parameter knob A to scroll through the available
Factory Preset locations (as indicated by a box
symbol after the preset number). Once the
appropriate preset has been selected press recall
again, at which point you will be asked to confirm
the action by pressing recall for a third time. This
is to guard against accidental recall of presets.
Factory Presets are locked so they cannot be over-
written. The user can, however, store an edited
version of a Factory Preset in any free preset
location.
Creating a Crossover
In addition to the Factory Presets the unit has two
further ‘Base Presets’; mono and stereo. These
Base Presets are stored in locations 1 and 2
respectively, they can be used to develop settings
for any loudspeaker combination and are recalled
in the same way as the Factory Presets described
above. These presets are also locked but the user
can name and store their own edited versions in
any free preset location.
Navigation and Viewing Parameters
Many of the processing elements in each input
and output path have features that may be
controlled by the user, such as gain, frequency or
limiter threshold. We call these adjustable
features parameters.
A parameter may be adjusted when it is displayed
by turning one of the three-parameter knobs.
Each of the three-parameter knobs is associated
with a zone on the display. Adjusting the leftmost
parameter knob will change the value of the para-
meter showing in the leftmost zone of the display
and so on. Turn a knob clockwise to increase the
value of a parameter, or anti-clockwise to
decrease it. The knobs are velocity-sensitive so
turning a knob rapidly will cause the action to
‘accelerate’, so the value changes more rapidly.
Navigation
The DSP parameters are organised by channel.
The currently selected channel is shown in the top
left hand corner of the display. You can navigate
between the channels by pressing the channel
buttons. Pressing the channel buttons will scroll
through the channels, utilities and back to the
default screen. When using a Preset that is stereo
linked, the channel selection will reflect this. For
example ‘1&4’ indicates outputs 1 and 4. When
navigating onto an output channel, the usage of
the output, as define in the Factory Preset, will be
shown briefly at the top of the screen.
Pressing the edit navigation buttons gives access
to the various pages of parameters available for
each channel. The currently selected page is
shown in the bottom left hand corner of the
display, this is omitted on some pages where the
function is obvious. The screen shows up to three
(normally related) parameters for a given part of
the processing functions on a given channel.
The edit buttons allow you to scroll, in either
direction, through the different processing pages
for a given Channel. When you go past the last
page, you will be returned to the default page.
The channel buttons allow you to scroll, in either
direction, through the input and output channels,