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WARNING

FOR YOUR PROTECTION, PLEASE READ THE
FOLLOWING:

Water and Moisture: Appliance 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 that objects do not fall and liq-
uids are not spilled into the enclosure through openings.

POWER SOURCES: The appliance should be connected to a power supply
only of the type described in the operating instructions or as marked on the
appliance.

GROUNDING OR POLARIZATION: Precautions should be taken so that the
grounding or polarization means of an appliance is not defeated.

POWER CORD PROTECTION: Power supply cords should be routed so that
they are not likely to be walked on or pinched by items placed upon or against
them, paying particular attention to cords at plugs, convenience receptacles,
and the point where they exit from the appliance.

SERVICING: To reduce the risk of fire or electric shock, the user should not
attempt to service the appliance beyond that described in the operating instruc-
tions.  All other servicing should be referred to qualified service personnel.

CAUTION: To reduce the risk of fire replace only with same type fuse.
ATTENTION: Utiliser un fusible de recharge de même type.

CAUTION: To reduce the risk of fire replace LAMP with manufacturers rec-
ommended part ( Refer to service literature)

U.K. MAINS PLUG WARNING

A moulded mains plug that has been cut off from the cord is unsafe.  Discard
the mains plug at a suitable disposal facility.  NEVER UNDER ANY CIR-
CUMSTANCES SHOULD YOU INSERT A DAMAGED OR CUT MAINS
PLUG INTO A 13 AMP POWER SOCKET.  Do not use the mains plug with-
out the fuse cover in place.  Replacement fuse covers can be obtained from
your local retailer.  Replacement fuses are 13 amps and MUST be ASTA
approved to BS1362.

The symbols shown above are internationally accepted symbols that warn of
potential hazards with electrical products.  The lightning flash with arrowpoint
in an equilateral triangle means that there are dangerous voltages present with-
in the unit.  The exclamation point in an equilateral triangle indicates that it is
necessary for the user to refer to the owner’s manual.

These symbols warn that there are no user serviceable parts inside the unit.
Do not open the unit.  Do not attempt to service the unit yourself.  Refer all
servicing to qualified personnel.  Opening the chassis for any reason will void
the manufacturer’s warranty.  Do not get the unit wet.  If liquid is spilled on
the unit, shut it off immediately and take it to a dealer for service.  Disconnect
the unit during storms to prevent damage.

ELECTROMAGNETIC 
COMPATIBILITY

This unit conforms to the Product Specifications noted on the Declaration of
Conformity.  Operation is subject to the following two conditions:

• this device may not cause harmful interference, and 
• this device must accept any interference received, including

interference that may cause undesired operation.  Operation of
this unit within significant electromagnetic fields should be
avoided.

• use only shielded interconnecting cables.

FCC COMPLIANCE

This equipment has been tested and found to comply with the limits for a Class
B digital device, pursuant to Part 15 of the FCC Rules. These limits are
designed to provide reasonable protection against harmful interference in a res-
idential installation. This equipment generates, uses and can radiate radio fre-
quency energy and, if not installed and used in accordance with the instruc-
tions, may cause harmful interference to radio communications. However, there
is no guarantee that interference will not occur in a particular installation. If
this equipment does cause harmful interference to radio or television reception,
which can be determined by turning the equipment off and on, the user is
encouraged to try to correct the interference by one or more of the following
measures:
• Reorient or relocate the receiving antenna
• Increase the separation between the equipment and receiver that may cause
undesired operation. 
• Connect the equipment into an outlet on a circuit different from that to which
the receiver is connected
• Consult the dealer or an experienced radio/TV technician for help.

SAFETY INSTRUCTIONS 

Notice For Customers If Your Unit Is Equipped With A Power Cord.
WARNING: THIS APPLIANCE MUST BE EARTHED.
The cores in the mains lead are coloured in accordance with the following
code:
GREEN and YELLOW - Earth        BLUE - Neutral        BROWN - Live
As colours of the cores in the mains lead of this appliance may not correspond
with the coloured markings identifying the terminals in your plug, proceed as
follows:

• The core which is coloured green and yellow must be con-

nected to the terminal in the plug marked with the letter E, or
with the earth symbol, or coloured green, or green and yellow.

• The core which is coloured blue must be connected to the ter-

minal marked N or coloured black.

• The core which is coloured brown must be connected to the

terminal marked L or coloured red.

This equipment may require the use of a different line cord, attachment plug,
or both, depending on the available power source at installation.  Connect this
equipment only to the power source indicated on the equipment rear panel. If
the attachment plug needs to be changed, refer servicing to qualified service
personnel who should refer to the table below.  The green/yellow wire shall be
connected directly to the unit's chassis. 

WARNING: If the ground is defeated, certain fault conditions in the unit or in
the system to which it is connected can result in full line voltage between
chassis and earth ground.  Severe injury or death can then result if the chassis
and earth ground are touched simultaneously.

Line

Neutral

Earth Grnd.

CONDUCTOR

L

N

Brown

Blue

Green/Yel.

Black

WIRE COLOR

White

Green

DECLARATION OF CONFORMITY

Manufacturer’s Name:

IVL Technologies Ltd.
per DigiTech specifications

Manufacturer’s Address:   

6710 Bertram Place
Victoria, B.C.
Canada V8M 1Z6

declares that the products:

DigiTech VCS-1 Dynamics Processor

conform to the following product specifications:

EMC:

EN 55022 (1987):
CISPR 22 (1993) Class B
EN 50082-1 (1992)

Supplementary Information:
The product herewith complies with the requirements of the Low Voltage Directive
73/23/EEC and the EMC Directive 89/336/EEC (1989) as amended by the CE
Marking Directive 93/68/EEC (1993).

IVL Technologies Ltd.
6710 Bertram Place
Victoria, B.C.
Canada V8M 1Z6
December 12, 1996 

Peter George, Vice President of Engineering

European Contact: Your local DigiTech Sales and Service Office or
International Sales Office
3 Overlook Drive   Unit #4
Amherst, New Hampshire 03031, USA Tel (603) 672-4244 Fax (603) 672 4246

Safety:

EN 60065
IEC 65 (1993)
Amendment 1 (1987)
Amendment 2 (1989)
Amendment 3 (1992)

Summary of Contents for VCS1

Page 1: ......

Page 2: ...ide reasonable protection against harmful interference in a res idential installation This equipment generates uses and can radiate radio fre quency energy and if not installed and used in accordance...

Page 3: ...Front Panel 5 Output Control 5 Clip LED 5 Tube Gain Control 5 VU Meter 5 Trim Adjustment 6 Gate Threshold Attenuation 6 De ess Control 6 Peak Limiter 7 Compressor Controls 7 Meter Function Switch 8 Au...

Page 4: ...upply to maximize signal to noise performance and transient response The premium grade 12AX7A vacuum tubes used in the VTP 1 are manufactured in Russia and hand tested and graded specifically for the...

Page 5: ...Connection Examples The following diagrams show a few ways in which the VCS 1 can be used 2...

Page 6: ...e jacks to be used if balancing is desired The 1 4 TRS inputs can also be used with an unbalanced source using a standard two conductor cable Plugging a 1 4 connector into the phone jack input will ov...

Page 7: ...LINE OUTPUT This output is servo balanced producing 4 nominal level to XLR and 1 4 TRS connectors Unbalanced cables may be used also 4...

Page 8: ...ing indicator to warn you of quick transient peaks that can cause audible output distortion The Clip LED will light when the signal is 3 dB below the onset of clipping Critical points in the audio pat...

Page 9: ...termines the level at which the noise gate closes Turning the control clockwise raises the threshold at which the gate will open For example if you have set the threshold to 20 dBu only signals louder...

Page 10: ...RATIO This control varies the amount of squeeze you need for the audio material that exceeds your threshold setting Turning the control clockwise from the 1 1 off position increases the ratio from ge...

Page 11: ...shold the Soft Knee setting will initiate a more gentle transition to com pression from just below the threshold This results in more natural sound even with higher ratios and attack times The Hard kn...

Page 12: ...t distort and low level notes that disappear in the mix Switch in the Auto setting and start with a ratio of 4 1 Auto is best for reducing release time chattering on sustained bass notes but you can s...

Page 13: ...S 1 s 4 5 kHz you can connect an equalizer into the Sidechain In this way you can experiment with the opti mum frequency by boosting individual frequencies until you find the correct one Because sibil...

Page 14: ...ed from the Sidechain Return works also Understanding VU Meter and Clip LED Readings The functions of the VU Meter and Clip LED combine to give an excellent indication of average and peak levels The b...

Page 15: ...12...

Page 16: ...tip hot Output Impedance 100 Nominal Output Level balanced or unbalanced 4 dBu Maximum Output Level balanced or unbalanced 21 dBu Side Chain Send Connector 1 4 TRS tip hot Type Impedance balanced Impe...

Page 17: ...pass 3 dB 4 5 kHz Vacuum Tube Circuit Type Class A high voltage parallel triode design Tube Complement Single 12AX7A per channel Saturation User variable Power Requirements Operating Voltage 120 V AC...

Page 18: ...15 DIGITECH VCS 1 SIGNAL FLOW DIAGRAM One Channel Only...

Page 19: ...Printed in the USA 18 2202 A...

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