Inter-m CSP-4.8 Bedienungsanleitung

MADE IN KOREA

March 2011

Inter-M, Ltd. (Korea) began operations in 1983.

Since then, Inter-M has grown to become one of the largest manufacturers

of professional audio and commercial sound electronics equipment in the world.

Inter-M has gained worldwide recognition for its own branded products,

as well as private label manufacturing of electronics sold under other names (OEM).

The company is no longer just a Korean company, but rather a global company

that is truly international in scope, with factories and offices in Korea and China,

and sales and marketing operations located in Japan, Europe, and the U.S.A.

With more than 850 employees around the globe,

Inter-M is well-poised for further growth and expansion.

Inter-M Americas, Inc.

13875 Artesia Blvd. Cerritos, CA 90703 USA

TEL : +1-562-921-0313, FAX : +1-562-921-0370

Home Page : http://www.inter-m.net, E-mail : [email protected]

Inter-M Corporation

Seoul OFFICE:653-5 BANGHAK-DONG, DOBONG-KU, SEOUL, KOREA

TEL : +82-2-2289-8140~8, FAX : +82-2-2289-8149

Home Page : http://www.inter-m.com, E-mail : [email protected]

Operation Manual

Signal Processor

CSP-4.8

SIGNAL PROCESSOR

Welcome

A personal welcome to you from the management and employees of Inter-M

All of the co-workers here at Inter-M are dedicated to providing excellent products with inherently good value,

and we are delighted you have purchased one of our products.

We sincerely trust this product will provide years of satisfactory service, but if anything is not to your complete

satisfaction, we will endeavor to make things right.

Welcome to Inter-M, and thank you for becoming part of our worldwide extended family!

RISK OF ELECTRIC SHOCK

DO NOT OPEN

CAUTION

CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK.

DO NOT REMOVE COVER (OR BACK).

NO USER-SERVICEABLE PARTS INSIDE.

REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.

WARNING

To prevent fire or shock hazard, do not

expose the unit to rain or moisture.

*WARNING FOR YOUR PROTECTION PLEASE READ THE FOLLOWING-WATER AND MOISTURE: Unit should not be used near water(e.g.

near a bathtub, washbowl, kitchen sink, laundry tub, in a wet basement, or near a swimming pool, etc). Care should be taken so than objects do

not fall and liquids are not spilled into the enclosure through openings.

*CLASS 2 WIRING (Adjacent to speaker terminal): The speaker output of this apparatus can exceed 10 Watts and could be a shock injury.

Connection to speakers should be performed by a skilled person.

*Do not install this equipment in a confined space such as a book case or similar unit.

*This apparatus shall not be exposed to dripping or splashing and no objects filled with liquids, such vases, shall be placed on the apparatus.

*This apparatus shall be connected to a mains socket outlet with a protective earthing connection.

It has heed to be easy to disconnect the device. To disconnect the device from power, separate AC input cable from inlet or unplug the AC Cord.

The socket-outlet shall be installed near the equipment and shall be easily accessible.

CAUTION

*These servicing instructions are for use by qualified service personnel only. To reduce the risk of electric shock, do not perform any servicing

other than that contained in the operating instructions unless you are qualified to do so.

NOTE

*This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are

designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment

generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful

interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will

be required to correct the interference at his own expense.

This symbol is intended to alert the user to the

presence of uninsulated “dangerous voltage” within

the product’s enclosure that may be of sufficient

magnitude to constitute a risk of electric shock to

persons.

This symbol is intended to alert the user to the

presence of important operation and maintenance

(servicing) instructions in the literature accompanying

the appliance.

Caution: To prevent electric shock do not use this (polarized) plug with

an extension cord, receptacle or other outlet unless the blades

can be fully inserted to prevent blade exposure.

Attentions: Pour prévenir les chocs électriques ne pas utiliser cette

fiche polarisée avec un prolongateur, une prise de courant

on une autre sortie de courant, sauf si les lames peuvent

étre insérées à fond sans en laisser aucune partie à

découvert.

SIGNAL PROCESSOR

CSP-4.8

Contents

Unpacking .......................................................................................................................................2

Installation

Environment....................................................................................................................................2

Important Safety Instructions.............................................................................................................2

Features............................................................................................................................................3

Front Panel ......................................................................................................................................4

PROTEA NE Software ..................................................................................................................13

Troubleshooting ............................................................................................................................14

Block Diagram ..............................................................................................................................15

Specifications ................................................................................................................................16

Dimensions ...................................................................................................................................17

Service............................................................................................................................................18

Variations and Options ...............................................................................................................18

Warranty .......................................................................................................................................18

SIGNAL PROCESSOR

2CSP-4.8

Installation

Unpacking

Although your DPA-430H is neither complicated nor difficult to operate, we recommend you take a few minutes

to read this brief manual and familiarize yourself with the important information regarding product features,

setup and operation.

As with most electronic devices, we strongly recommend you to retain the original packaging. In the unlikely

event the product must be returned for servicing, the original packaging (or reasonable equivalent) is required.

Installation

Environment

Never place this product in an environment which could alter its performance or reduce its service life. Such

environments usually include high levels of heat, dust, moisture, and vibration.

IMPORTANT SAFETY INSTRUCTIONS

1. Read these instructions.

2. Keep these instructions.

3. Heed all warnings.

4. Follow all instructions.

5. Do not use this apparatus near water.

6. Clean only with dry cloth.

7. Do not block any ventilation openings. Install in accordance with the manufacturer’s instructions.

8. Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including

amplifiers) that produce heat.

9. Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two blades

with one wider than the other. A grounding type plug has two blades and a third grounding prong. The wide

blade or the third prong are provided for your safety. If the provided plug does not fit into your outlet, consult

an electrician for replacement of the obsolete outlet.

10. Protect the power cord from being walked on or pinched particularly at plugs, convenience receptacles, and

the point where they exit from the apparatus.

11. Only use attachments/accessories specified by the manufacturer.

12. Use only with the cart, stand, tripod, bracket, or table specified by the manufacturer, or sold with the apparatus.

When a cart is used, use caution when moving the cart/apparatus combination to avoid injury from tip-over.

13. Unplug this apparatus during lightning storms or when unused for long periods of time.

14. Refer all servicing to qualified service personnel. Servicing is required when the

apparatus has been damaged in any way, such as power-supply cord or plug is

damaged, liquid has been spilled or objects have fallen into the apparatus, the

apparatus has been exposed to rain or moisture, does not operate normally, or has

been dropped.

S3125A

SIGNAL PROCESSOR

CSP-4.8

Features

- 4 in, 8 out Digital Signal Processor

- DSP function : Gain, Parametric EQ, Filter, Time delay, Crossover, Compressor, Limiter, Matrix routing

- 24 bit, 48kHz delta-sigma A/D converters with 128x oversampling

- A backlit 2 x 20 character LCD displays channel and function settings

- CSP-4.8 Software for Windows, which allows complete PC control of the unit through a USB jack

SIGNAL PROCESSOR

4CSP-4.8

Front Panel

1. FUNCTION KEYS AND DATA WHEEL

To the right of the LCD display are two

unlabeled function keys and a rotary data

wheel. All audio and system parameters are

edited using these three controls. Each of the

two lines of text on the LCD display correspond

to a dedicated function key, so that various tasks

on both lines may be selected using their respective keys. The selected task is highlighted by a flashing

underscore beneath the word or number, and the parameter is then adjusted up or down with the data

wheel. The Esc key will exit any activity and return to the top level showing the preset number and name.

2. PRESETS

The CSP-4.8 is organized into 30 programmable presets, each completely defining the configuration of all

inputs and outputs along with their respective audio components. There are ten repeating preset

configurations pre-loaded into the unit which are simply starting points for common applications, and all

can be modified, renamed, and saved to suit the end user. Please Note: In addition to the 30 preset

numbers, a constantly refreshed Working Preset is used to take a "snapshot" of all current settings should the

unit be turned off before changes can be saved. When the unit is first powered up, the last working preset is

loaded, displaying the number and name last used before the unit was turned off. Any modifications made

to that preset before saving it will remain in the working preset until either the modified preset is saved, or a

fresh preset is recalled. When modifications to an existing preset are made without saving, the display adds

the text (modified) after the preset number.

3. INPUT SELECT

There are four XLR audio inputs on the CSP-4.8 and

each input is processed independently and may be

routed to one or several outputs. Select an input to

edit its Gain, EQ, and Delay settings, or to mute it.

Signal routing occurs in the output section.

SIGNAL PROCESSOR

CSP-4.8

4. OUTPUT SELECT

There are eight outputs on the CSP-4.8 and each

output can obtain its source from any input or

combination of inputs. Select an output channel

to edit its Source, Gain, Polarity, EQ, Delay,

Crossover, or Limiter functions.

5. LED INDICATORS

Each input and output has a five segment LED array for audio level display, ranging from -20 through

clipping. The -20 LED is two-color, also serving as the Mute indicator by turning red. The meter scale is

factory set so that 0 on the meter is 0dBu (0.775Vrms), however it can be easily changed to VU scale (0 =

+4dBu, or 1.228Vrms) within the Util menu.

6. AUDIO FUNCTIONS

1) Gain

Input and Output Gain are separately adjustable

from -40dB to +12dB in 0.1dB increments. The

output gain menu also provides for selection of

input source(s) for a given output channel, as well

as polarity of the outgoing signal. Any input or

combination of inputs can be routed to any or all

outputs. Keep in mind that two signals which

share significant content, such as a stereo source,

will be up to 6dB louder when combined.

2) EQ

-The CSP-4.8 EQ section offers full parametric EQ as

well as 1st and 2nd order shelving filters on inputs

and outputs. Each input channel has six selectable

EQ filters, while each output channel has four

selectable EQ filters. In all cases, each filter is

selectable between parametric (PEQ), 1st order Low

Shelf (LS1), 2nd order Low Shelf (LS2), 1st order

High Shelf (HS1), and 2nd order High Shelf (HS2).

- Shelving EQ filters : 1st order filters use a gentle

6dB per octave slope, while 2nd order filters use

a 12dB per octave slope for more a pronounced

boost or cut. All shelving filters have a boost/cut

range of +/-15dB. Low shelving filters have a

frequency range from 19.7Hz through 2kHz, and

the high shelving filters range from 3.886kHz

through 21.9kHz. Shelving filters are most useful

as broad tone controls to boost or cut the high

end or low end of an audio signal's frequency

content. Because they affect a wider spectrum of

audio, they are not as suitable for feedback control as parametric filters.

GAIN A

0.0dB

GAIN 1

0.0dB

Source:A

Pol:Normal

EQ 1

0.0dB

Filtr:1-PEQ

1000Hz 1.00o

200Hz 2KHz 20KHz20Hz

0dB

-10dB

-20dB

+10dB

+20dB

-30dB

Low Shelf High Shelf

CSP-4.8 Shelving Filters

2nd Order Filter

1st Order Filter

SIGNAL PROCESSOR

6CSP-4.8

Parametric EQ (PEQ) uses peak filters with the

ability to control boost or cut, frequency center,

and bandwidth. Think of one band of parametric

EQ as a single graphic equalizer fader except

that the frequency is variable, not fixed, and that

the bandwidth, or how "wide" the filter affects the

frequency spectrum at the center frequency, is

completely variable. The smaller the bandwidth,

the less the audio signal on either side of the

frequency center is boost or cut, whereas a larger

"wider" bandwidth produces an audible change

to the overall tone of a signal. Parametric filters are best used to hunt down and eliminate problem feedback

frequencies, add or remove a characteristic "hot spot" from microphones, or clean up room resonance

situations. It is well worth the time getting proficient with parametric EQ filters, as they offer the best solution

to many EQ problems.

The CSP-4.8 parametric filters have a boost/cut range of +15dB to -30dB. There is more cut than boost

because one of the more common uses for parametric filters is to dramatically cut, or "notch out", very

narrow frequencies (low bandwidth) in order to eliminate system feedback problems.

Every instance of a parametric EQ filter has a center frequency selected. The factory default is 1kHz, but

each filter's center frequency is adjustable from 19.7Hz to 21.9kHz in 1/24 octave steps. Carefully

sweeping a narrow bandwidth filter through a problem feedback area, with just a slight boost, is a quick

way to find the exact frequency causing trouble. Once the offensive frequency has been found, cut the filters

level, and then the bandwidth is adjusted as narrow as possible while still eliminating the feedback problem.

Bandwidth is adjustable from about 1/64 octave to four octaves, and the lower the bandwidth, the less

audible the filter action will be. Finding the problem frequency is relatively easy, but finding the best

combination of cut and bandwidth takes a little practice. Again, it is well worth the time becoming

comfortable with the notching procedure, so that problems can be quickly addressed with a sufficient but

minimal amount of correction. The EQ functions on all four inputs and eight outputs are switched in or out

on an individual channel basis. In other words, each input or output has one "switch" for all of its EQ filters.

If certain filters are not going to be used within a channel, simply leave the gain for that filter at 0.0dB, and

the filter will have no effect.

For an excellent interactive display of the way parametric and shelving filters work, experiment with the CSP-

4.8 EQ section of Protea NE Software. The software works whether a unit is connected or not, so it is an

invaluable teaching tool as well as an audio setup tool for the CSP-4.8. The program is shipped with the

CSP-4.8, but is also available on the Ashly web site.

200Hz 2KH z 20K Hz20Hz

0dB

-10dB

-20dB

+10dB

+20dB

-30dB

CSP-4.8 Shelving Filters

Wide (High) Bandwidth

Narrow (Low) Bandwidth

SIGNAL PROCESSOR

CSP-4.8

3) Delay

In large installations or outdoor venues there

are often many speaker clusters in various

locations to get the best coverage possible.

Since sound travels relatively slow through air

(1130 ft/s at 20®¨C), multiple loudspeaker

locations can create a situation where the original audio signal, simultaneously leaving all loudspeakers,

arrives at a single point in the venue at several different times. Needless to say this causes problems, and

what may be crystal clear sound directly in front of any one loudspeaker can be unintelligible in the farther

reaches of the venue with direct line-of-sound to multiple loudspeakers. The solution is to delay the audio

signal to the loudspeakers located beyond the main stage area, so that sound comes out of the distant

loudspeakers at the exact time that sound from the main stage loudspeakers arrives. Within the CSP-4.8, up

to 682 milliseconds of time delay are available, allowing secondary loudspeaker clusters to be time aligned

with the primary speakers up to 771 feet (235m) away from the main stage area.

Output channels have time delay as well. Output

delay is best used to align discrete drivers within a

speaker cabinet or cluster, normally quite close

together. For example, a typical three way speaker

cluster would have low end, midrange, and high

frequency drivers all located near one another.

The different drivers for each frequency band are

not necessarily the same physical depth with

respect to the front of the loudspeaker cluster, so

there exists the problem of same signals (at the

crossover points) arriving at the cluster "front" at

different times, creating undesirable wave

interaction and frequency cancellation. The

solution, again, is to slightly delay the signal to the drivers closest to the cluster

front. Using the location of the driver diaphragm farthest back as a reference

point, measure the distance to other drivers in the cluster, and set the output

delay for each accordingly, with the driver diaphragm closest to the front getting

the longest delay and the driver at the very back getting no output delay.

Note: Although delay in the CSP-4.8 is adjusted only by time, the corresponding

distance in both feet and meters is always shown as well.

4) Crossover (Xover)

Crossover functions are available only on the output channels. Every channel's crossover consists of a high

pass filter (HPF) and a low pass filter (LPF), along with the frequencies and filter types used. Each output's

crossover section is essentially a bandpass filter, making it necessary for the user to map out ahead of time

which outputs will be used for the various

frequency bands, and set the overlapping

filter frequencies and types accordingly.

Note: The HPF determines the lower

frequency limit of the signal, while the LPF

determines the upper frequency limit.

DELAY 1

0.00m

0.00ms

0.00ft

Same sound arrives at

two different times.

Fix by delaying secondary

speakers 177mS.

Speaker on

Main Stage

Secondary Speaker

200 ft from Main Stage

Input (Long) Time Delay

For Remote Speakers

High - No Delay

Midrange Delay

12 Inches = 0.9mS

Low Delay

8 Inches = 0.6mS

Example: 12 Inches

Example: 8 Inches

Output (Short) Time Delay

For Driver Alignment

CROSSOVER 1

19.7Hz

HPF

24dB-Lnkwtz

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