VIETA VDC-48 User Manual

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VDC-48

Loudspeaker Management System

User Manual

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Important Safety Instructions

1. READ THESE INSTRUCTIONS All the safety and operating instructions should be read before the product is operated.

2. KEEP THESE INSTRUCTIONS The safety and operating instructions should be retained for future reference.

3. HEED ALL WARNINGS All warnings on the product and

the operating instructions should be adhered to.

4. FOLLOW ALL INSTRUCTIONS All operating and use of instructions should be followed.

5. DO NOT USE THIS APPARATUS NEAR WATER Do not use the product near water. For example, near a bathtub, washbowl, kitchen sink, or laundry tub,

in a

wet basement, or near a swimming

pool,

and the like.

6. CLEAN ONLY WITH DRY CLOTH

Unplug the unit from the wall outlet before cleaning. Do not use

liquid

cleaners or

aerosol cleaners. Use a damp cloth for cleaning.

7. DO NOT BLOCK ANY VENTILATION OPENINGS Slots and openings

the cabinet back or bottom are provided for ventilation, to ensure reliable operation of the limit and to protect it from overheating. These openings must not be blocked or covered. The openings should never be blocked by placing the product on a bed, sofa, rug, or similar surface. This product should never be placed near or over a radiator or heat source. This product should not be placed

in a

built-in installation such as a bookcase or rack unless proper ventilation is provided or the manufacture's instructions have been adhered to.

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8. DO NOT INSTALL NEAR ANY HEAT SOURCES This Product should be situated away from heat sources such as radiators, stoves, or other products (including amplifiers) that produces heat.

9. DO NOT DEFEAT THE SAFETY PURPOSE OF THE POLARIZED OR GROUNDING-TYPE PLUG A Polarized

plug

has two blades with one

der than the other. A grounding-type

plug

has two blades and a third groun

ding

prong. The wide blade or the third prongs 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

NCHED 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 CART, STAND, TRIPOD, BRACKET, OR TABLE SPECIFIED BY THE MANUFACTURER, OR SOLD WITH THE APPARATUS. WHEN A CART

USED, USE

CAUTION WHEN MOVING THE CART/APPARATUS TO AVOID INJURY FROM TIP-OVER

. Do not place this unit on an unstable cart, stand, tripod, bracket, or table. The unit may fall, causing serious injury to someone, and serious damage to the appliance. A unit and cart combination should be moved with care. Quick stops, excessive force, and uneven surfaces may cause the product and cart combination to overturn.

13. UNPLUG THIS APPARATUS DURING

GHTNING STORMS OR WHEN UNUSED FOR

LONG PERIODS OF

ME.

For added protection for this unit during a

lightning

storm, or when it is left unattended

and unused for

long

periods of time, unplug it from the wall outlet and disconnect the

antenna or cable system. This

will

prevent damage to the unit due to

lightning

and power

line surges.

14. REFER ALL SERVICING TO QUALIFIED SERVICE PERSONNEL. SERVICING

IS REQUIRED WHEN THE APPARATUS HAS BEEN DAMAGED IN ANYWAY, SUCH AS WHEN THE POWER SUPPLY CORD OR PLUG

DAMAGED,

QUID 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 FROPPED.

15. WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS APPARATUS TO RAIN OR MOISTURE.

16. APPARATUS SHALL NOT BE EXPOSED TO DRI

PPING OR

SPLASHING AND NO

OBJECTS FILLED WITH LIQUID

SUCH AS VASES, SHALL BE PLACED ON THE

APPARATUS

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Table of Contents

Table of Contents ................................................................... 4

1.0 Introduction .................................................................... 5

2.0 Features .......................................................................... 6

3.0 Front Panel Functions ................................................... 7

4.0 Rear Panel Functions .................................................... 9

5.0 Powering Up the Device .............................................. 10

6.0 Operating the Channel Menus .................................... 11

7.0 Operating the System Menus ..................................... 18

8.0 Quick Reference........................................................... 25

9.0 PC Control Software .................................................... 26

10.0 Specifications............................................................... 27

11.0 Warranty........................................................................ 29

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1.0 Introduction

The

VDC-48 is a

digital loudspeaker management system designed for

the touring or

xed sound installation markets. The absolute latest in

available technology is utilized with 40-bi

t fl

oating point processors and high performance 24-bit Analog Converters. The high-bit DSP prevents noise and distortion induced by truncation errors of the commonly used 24bit fixed-point devices.

complete set of parameters include

I/O

levels, delay, polarity, 8 bands of EQ per channel, 31 bands of GEQ per input, multiple crossover selections and full function limiters. Precise frequency control is achieved with its 1 Hz resolution. Inputs and outputs can be routed in multiple configurations to meet any requirement. The

VDC-48 can be controlled or configured in real time on the front panel or with the intuitive PC GUI accessed via

the

RS-232, USB or Ethernet interface. Software upgrade for CPU and DSP via PC keeps the device current with newly developed algorithms and functions once available. Multiple setup storage and system security complete this professional package.

Shipped

contents:

VDC-48

Unit

- User Manual

- XConsole Software CD

- Power Cord

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2.0 Features

Up to 8 Inputs and 8 Outputs with flexible routing

40-bit floating point DSP

96kHz Sampling Rate

High Performance 24-bit A/D Converters

1 Hz Frequency Resolution

8 Equalizers (Magnitude or Phase) for each Input and Output

31 Bands GEQ for each Input

Multiple Crossover types with Full Function Limiters

Precise Level, Polarity and Delay

CPU and DSP upgrade via PC

Individual Channel Buttons with Linking capability

2-Line x 16 Character Backlit LCD Display

Full 5-segment LED’s on every Input and Output

Storage of up to 30 Preset Setups

Security Lock

Ethernet, USB and RS232 Interface for PC Control and Configuration

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3.0 Front Panel Functions

1. USB – a standard Type

USB connector. Device driver from the

provided software CD must be installed prior to usage.

2. RS232 – a standard female DB9 socket.

straight through cable is

required for PC connection.

3. Mute (Channel Menu) Buttons – Mute or un-mute input and output

channels. When an input channel is muted, a red LED will come on for indication.

When the

Menu or Me

nu>>

key is held down, the Mute Buttons selects the corresponding channel for the LCD menu display and is acknowledged by a green LED below the button. The last modified menu will be displayed on the LCD. Multiple channels can be linked or unlinked by pushing the desired channels. This eases programming for same parameters across multiple channels. Multiple Inputs can be linked together and multiple outputs can be linked together. Inputs and Outputs are linked separately.

4. Channel Menu LED – Indicates

the

activated

channels

for

data

modification.

2 3 4

6 7

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5. Peak Level LED – Indicates the current peak level of the Signal: Signal, -12dB, -6dB, -3dB, Over/Limi

The Input Limit LED references to the device's maximum headroom. The Output Limit LED references to the threshold of the output limiter.

6. LCD – Shows all the necessary information to control the uni

7. Menu Buttons – There are 6 menu keys: <<Menu (Menu Down),

Menu>> (Menu Up), <<Cursor (Cursor Down), Cursor

(Cursor Up),

Enter/Sys/Speed, Exit

The functions of each key is explained below:

<<Menu:

Go to previous menu screen. Holding this button

down while pressing Mute key will go to the specify channel menu.

Menu>>:

Go to next menu screen.

Holding this button down while pressing Mute key will go to the specify channel menu.

<<Cursor:

Go to previous cursor in the menu screen.

Cursor>>:

Go to next cursor in the menu screen.

Enter/Sys/Speed: Enter is used only in the System Me

nu to

proceed

with selected actions.

Sys enters the System Menu from the main menu. Speed modifies delay and frequency (1 Hz

resolution mode) data values by 100X.

Exit:

Exit to the Main Menu

8. Rotary Thumb Wheel – Changes parameter data values. The wheel has travel velocity sensing which ease large incremental data modifications. For modifying delay and frequency (1 Hz resolution), pressing the Speed key simultaneously will increment/decrement the data value by 100X.

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4.0 Rear Panel Functions

1,2,3 4 5

1. Main Power – Connects via a standard IEC socket.

compatible power

cord is supplied with the unit. The voltage input is 90-240VAC, 50-60Hz.

2. Main Fuse – T2.5A-250V. Slow blow type.

3. Power switch – Controls power

On/Off.

4. Ethernet – RJ45 connector for Ethernet control.

The device should be

connected to a router/switch/hub via a straight through CAT-5 cable.

5. Analog Inputs and Outputs – Separate 3-pin connectors are provided for each audio input and output. The device's output stage employs the balanced impedance topology. All

I/O

connectors have pin 1 as ground

(shield), pin 2 as

and pin 3 as

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5.0 Powering Up the Device

•

After powering up the unit, the following initialization screen is displayed

on the LCD:

VIETA VDC-48

VDC-48 v7.05

•

The initialization process takes several seconds and during that period

the unit boots and displays the device model and firmware version.

•

After the initialization process is finished the

VDC-48

displays its main

screen:

VIETA VDC-48

P01*

•

The screen shows the current program number and program name

assigned to the unit.

the program number is 31 and the name is

MEMORY,

means that no program is assigned, the last data before

previous power down is recalled instead.

•

Now the

VDC-48 is

ready to operate.

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6.0 Operating the Channel Menus

Channel Linking – While holding down the <<Menu or Menu>

more than 1 channel from the same group (Input or Output group) can be selected to link the channels together. The green LEDs below the Mute buttons are li

for the linked channels.

Any

modification of the data for the selected channel will be applied to the linked channels as well. To cancel the linking, simply deselect the desired channel while the <<Menu or Menu>> key is still pressed, or just press the Exit key to deselect all channels.

6.1

Input/Output Signal

LEVEL: The level (or gain) ranges from -40.00dB to +15.00dB in 0.25dB steps.

POL:

I1: Signal LEVEL:0.00dB

The polarity (or phase) can be normal (+) or inverted (-).

I1: Signal POL:+

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DELAY: The maximum delay permitted is 650ms, in steps of approximately 10us.

can be displayed in ms,

ft or m.

The time unit of the delay is set in the

System

Please refer to page 21 for more details.

I1: Signal

DELAY:000.000ms

6.2

Input/Output

Equalizer

EQ#: Each input channel has 8 bands of equalization. This control selects one of the 8 available bands.

I1: EQ1 EQ#:1

BYPASS: This control will un-bypass

(Off) or

bypass (On) the currently selected band.

I1: EQ1 BYPASS:Off

TYPE: The 5 types of EQ that can be used are: parametric (PEQ), low shelf (LOSHF), high shelf (HI-SHF), 1

degree all-pass (AP-1), and 2

degree all-

pass (AP-2).

I1: EQ1 TYPE:PEQ

FREQ: The EQ center frequency ranges from 20Hz to 30kHz in either 1Hz steps or 1/36 octave steps. The frequency steps can be selected in the System

Please refer to page 21 for more details.

I1: EQ1 FREQ:1000Hz

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BW: The EQ bandwidth ranges

rom 0.02 to 3.61 octaves in steps of 0.01

octave. The equivalent Q value is automatically shown besides the octave value. For 1

degree all-pass (AP-1) filter, the bandwidth will sets the

phase shi

ft at

the centre frequency. This phase shi

ft is

gradually changed

from 180 degrees above the centre frequency to the specified value.

I1: EQ1 BW:0.33 Q=4.36

I1: EQ1 DEG:15.5 deg

LEVEL: The EQ level (or gain) ranges from -30.00dB to +15.00dB in 0.25dB steps.

I1: EQ1 LEVEL:0.00dB

6.3

Input

Graphic Equalizer

GEQ#: The graphic equalizer has 31 bands of equalization from 20Hz to 20kHz

This control selects one of the 31 available bands.

The frequency

corresponding to each band is also shown.

I1: GEQ1 GEQ#:1 f=20

LEVEL: The GEQ level (or gain) ranges from -30.00dB to +15.00dB in 0.25dB steps.

I1: GEQ1 LEVEL:0.00dB

BYPASS: This control will un-bypass

(Off) or

bypass (On) the entire GEQ for this

channel.

I1: GEQ1 BYPASS:Off

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6.4

Input/Output

Crossover

TYPL: The 3 available filter types for the low frequency crossover point (high pass) are: Butterworth, Linkwitz Riley or Bessel.

O1: XOver TYPL:Off

FRQL: The filter cut-off frequency for the low frequency crossover point (high pass) ranges from 20 to 30kHz in either 1Hz steps or 1/36 octave steps. The frequency steps can be selected in the System Menu. Please

refer to

page 21 for more details.

O1: XOver FRQL:1000Hz

SLPL: The filter slope for low frequency crossover point (high pass) ranges from 6 to 48dB/octave.

the selected filter type is Linkwitz Riley, the available

slopes are 12, 24, 36 or 48 dB/octave only.

O1: XOver

SLPL:24dB

TYPH: The 3 available filter types for the high frequency crossover point (low pass) are: Butterworth, Linkwitz Riley or Bessel.

O1: XOver TYPH:Off

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FRQH: The filter cut-off frequency for the high frequency crossover point (low pass) ranges from 20 to 30kHz in either 1Hz steps or 1/36 octave steps. The frequency steps can be selected in the System Menu. Please

refer to

page 21 for more details.

O1: XOver FRQH:1000Hz

SLPH: The filter slope for high frequency crossover point (low pass) ranges from 6 to 48dB/octave.

the selected filter type is Linkwitz Riley, the available

slopes are 12, 24, 36 or 48 dB/octave only.

O1: XOver

SLPH:24dB

Filter configuration

Low

crossover

poi

High crossover poi

None

FTRL

Off

FTRH

Off

Highpass

FTRL not

Off

FTRH

Off

FRQL

Lowpass

FTRL

Off

FTRH not

Off

FRQH

Bandpass

FTRL not

Off

FTRH not

Off

FRQL FRQH

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6.5

Input

Compressor

THRESH: The compressor threshold ranges from -20 to +20dBu in 0.5dB steps.

O1: Comp THRESH:+20.0dB

ATTACK: The compressor attack time ranges from 0.3 to 1ms in 0.1ms steps, then ranges from 1 to 100ms in 1ms steps.

O1: Comp ATTACK:10ms

RELEASE: The compressor release

time

can be set at 2X, 4X, 8X

16X or 32X the

attack time

O1: Comp RELEASE:8XAtck

RATIO: The compressor ratio is the slope in which the signal is compressed.

ranges from 1:1 to 1:40.

O1: Comp RATIO: 1:1

6.6

Input/Output

Cha

nnel

Name

NAME: A 6

characters name can be assigned to each channel.

I1: Name NAME:

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6.7 Output Limiter

THRESH: The limiter threshold ranges from -20 to +20dBu in 0.5dB steps.

O1: Limit THRESH:+20.0dB

ATTACK: The limiter attack

time

ranges from 0.3 to 1ms in 0.1ms steps, then ranges

from 1 to 100ms in 1ms steps.

O1: Limit ATTACK:10ms

RELEASE: The limiter release time can be set at 2X, 4X, 8X, 16X or 32X the attack time.

O1: Limit RELEASE:8XAtck

6.8 Output Source

IN1-4: This sets the input channel source for the current output channel.

can be

used to mix the input source (in dB) or disable

it (Off). If

more than one

input sources are enabled, they will be added together as the source for the current output channel.

O1: Source IN1:Off

O1: Source IN2:-14.00

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7.0 Operating the System Menus

The System Menus allow the user to control and change parameters that are related to the system behavior and general operation.

can be accessed by pressing the Sys key in the main menu (when no Input/Output or System Menu is activated). All System Menus require pressing the Enter key to confirm and save the settings.

7.1 Preset Recall

The

VDC-48

has a built in non-volatile memory that can store up to 30

different preset setups.

P: This control selects which program to recall from the non-volatile memory. The program name is displayed to the right of the program no.

SYSTEM Recall P:1

7.2 Preset Store

The

VDC-48

has a built in non-volatile memory that can store up to 30

different preset setups.

program can be stored using this menu. The old program with the same program number will be replaced. Once the program is stored in the flash memory,

can be recalled at a later

me, even after

power down.

P: This control selects which preset location in the non-volatile memory to be saved.

SYSTEM Store

P:1

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NAM: A

descriptive name of up to 12 characters can be assigned to each

program.

SYSTEM Store NAM:

7.4 Device Configuration

MODE: The unit assigns the Input source for the corresponding outputs when the Mode of Operation is changed. The crossover point parameters like the filter type, cut-off

equency and slope have to be configured manually in

the Crossover Menu for each Output Channel.

SYSTEM Config

MODE:None

Mode: Out 1 Out 2 Out 3 Out 4 Out 5 Out 6 Out 7 Out 8

None Any Any Any Any Any Any Any Any Stereo 2-Way In1 In1 In2 In2 Any Any Any Any Stereo 3-Way In1 In1 In1 In2 In2 In2 Any Any Stereo 4-Way In1 In1 In1 In1 In2 In2 In2 In2

*Note: The configuration mode configures the input sources when selected. The user can change the source afterwards

desired.

does not keep the

configuration in memory.

7.5 Copy Channels

Copy Channels from the source to the target. When the Source and Targets are both Inputs and Outputs, all audio parameters will be copied. When one of the Source or the Target is an input while the other is an output, only the Level, Polarity, Delay,

EQ,

Crossover, and Channel Name

are copied.

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SOURCE: This is the channel to be copied from

SYSTEM Copy

SOURCE:In1

TARGET: This is the channel to be copied

to.

SYSTEM Copy

TARGET:In2

7.6 General Settings

FREQ MODE: This changes the frequency control mode for EQ and crossover filters.

can be 36 steps/octave or All Frequencies (1 Hz resolution).

SYSTEM Generl

FREQ MODE:All

DELAY UNIT: This sets the time unit for input and output delay to ms,

ft, or

SYSTEM Generl

DELAY UNIT:ms

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7.7 Communication Settings

NOTE: User must power cycle the unit for this settings to take

effect.

BAUD RATE: The sets the baud rate of the serial communication. XConsole uses a baud rate of 115200,

should be le

unchanged for most user.

SYSTEM Comm BAUD RATE:115200

DEVICE

ID:

This control assigns a device ID from 1 to 16 to the unit. This ID is only useful when a network of more than 1 unit is used in conjunction with 1 or more XPanel.

SYSTEM Comm DEVICE ID:1

NETWORK

ID: This control assigns a network ID from 0 to 60000 to the unit. This ID is used for future network expansion only, please leave

it at 0.

SYSTEM Comm NETWORK ID:0

7.8 Ethernet Settings

The network settings are separated into 3 menus.

Eth-IP: A

unique

address should be assigned to each unit in the network.

SYSTEM Eth-IP

:255.255.255.255

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Eth-GW: The gateway address of the network. Usually, this should be the

address

of your router/switch/hub address.

SYSTEM Eth-GW

:255.255.255.255

Eth-SM: The sets the subnet mask used by your network.

SYSTEM Eth-SM

:255.255.255.255

7.9 Security Password

The factory default password is blank (“

”),

can be changed to any

combination of 4 characters in this menu.

OLD

PW:

The user is required to enter the old password first to modify the password.

SYSTEM Passwd OLD PW:

NEW PW

The new password desired.

SYSTEM Passwd NEW PW:

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7.10 Security Lock

The

VDC-48

enables the user to secure the unit and prevent undesired changes in the setup. In order to lock or unlock the unit the user must enter the correct password. The user can only lock or unlock all menus using the front panel, XConsole is required to lock or unlock individual menu.

PASSWORD: The password is 4 characters in length. The factory default of a new unit does not require a password. The user can change the password via XConsole or the Set Password menu.

SYSTEM Secure PASSWORD:

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8.0 Quick Reference

Parameters

<<Menu

Field

<<Cursor>

Min

Max

Steps

Units

Mic Level

Mic

LEVEL

+45

Level

Signal LEVEL

-40

+15

0.25

Polarity

Signal POL

Delay

Signal

DELAY

62400

10us

steps

EQ Number

EQ#

EQ Bypass

BYPASS

Off

/On

EQ Type

TYPE

PEQ

Lo-Sh

f /

Hi-Shf

AP-1

AP-2

EQ Level

LEVEL

-30

+15

0.25

EQ Frequency

FREQ

30,000

EQ Bandwidth

0.02

3.61

0.01

Octave

GEQ Number

GEQ

GEQ#

GEQ Level

GEQ

LEVEL

-30

+15

0.25

GEQ Bypass

GEQ

BYPASS

Off /

XOver Low Type

XOver

FTRL

Off /

Butterworth

Linkwitz-Riley

Bessel

XOver Low Frequency

XOver FRQL

30,000

XOver Low Slope

XOver SLPL

dB/octave

XOver High Type

XOver

FTRH

Off /

Butterworth

Linkwitz-Riley

Bessel

XOver High Frequency

XOver FRQH

30,000

XOver High Slope

XOver SLPH

dB/octave

Compressor Threshold

Comp THRESH

-20

+20

0.5

dBu

Compressor Attack Time

Comp ATTACK

0.3

100 0.1

Compressor Release Time

Comp RELEASE

/ 4 / 8 / 16 /

32X Attack time

Compressor Ratio

Comp RATIO

1:1 to 1:40

Limiter Threshold

Limit

THRESH

-20

+20

0.5

dBu

Limiter Attack Time

Limit

ATTACK

0.3

100

0.1/1

Limiter Release Time

Limit

RELEASE

/ 4 / 8 / 16 /

32X Attack time

Source

1, 2, 3, 4, 5, 6, 7, 8

Off

+15

0.25

Channel Name

Name NAME

6 characters

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9.0 PC Control Software

The

V D C - 4 8 is

shipped with a special PC Graphic User Interface (GUI) application - XConsole. XConsole gives the user an option to control the unit

from

remote

via

the

serial

communication

link.

The

GUI

application makes

much easier to control and monitor the device, allowing the user to get the whole picture on one screen. Programs can be recalled and stored from/to PC’s hard drive, thus expanding the storage to become virtually limitless.

XConsole can be connected to the

VDC-48

via RS232, USB or Ethernet. USB requires the installation of additional driver. The user is given an option to install

during the installation of XConsole, and

the user did not

install

it at

that time, they may choose to do so by running the USB driver

installer from the provided software CD.

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10.0 Specifications

Inputs and Outputs

Input Impedance:

>10k Ohms

Output Impedance:

50 Ohms

Maximum Level

+20dBu

Type:

Electronically balanced

Audio Performance

Frequency Response:

+/-

0.1dB (20 to 30kHz)

Dynamic Range:

115dB typ (unweighted)

CMMR:

60dB (50 to 10kHz)

Crosstalk:

-100dB

Distortion:

0.002% (1kHz @+4dBu)

Digital Audio Performance

Processor:

40-bit

Sampling Rate:

96kHz

Analog Converters:

High Performance 24-bit

Propagation Delay:

1.5ms

Front Panel Controls

Display:

2 x 16 Character Backlit LCD

Level Meters:

5 segment LED

Buttons:

Mute/Edit Controls

Menu Controls

Dial Encoder:

Embedded Thumb Wheel

Connectors

Analog Inputs:

3-pin Female XLR

Analog Outputs:

3-pin Male XLR

RS-232:

Female DB-9

USB:

Type

Power:

Standard IEC Socket

General

Power:

90-240 VAC (50-60Hz)

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Dimensions:

19”x1.75”x9” (483x44x229 mm)

Weight:

10 lbs

4.5 kg

Audio Control Parameters

Mic Gain:

0to +45dB in 3dB steps

Gain:

-40 to +15dB in 0.25dB steps

Polarity:

+/-

Delay:

Up to 650ms per

I/O

Equalizers (8 per

I/O)

Type:

Parametric, Hi-shel

Lo-shel

Phase 1, Phase 2

Gain:

-30 to +15dB in 0.25dB steps

Bandwidth:

0.02 to 3.61 octaves (Q=0.3 to 72)

31-Band Graphic Equalizers (1 per Input) Gain:

-30 to +15dB in 0.25dB steps

Crossover Filters (2 per

I/O)

Filter Types:

Butterworth, Bessel, Linkwitz Riley

Slopes:

6 to 48dB/oct

Limiters (1 per Output) Threshold:

-20 to +20dBu

Attack:

0.3 to 100ms

Release:

2 to 32X the attack time

System Parameters

No. of Presets:

Program Names:

12 character length

Delay Units:

ms,

ft, m

Frequency Modes:

36 steps/oct, 1Hz resolution

Note: Specifications subject to change without notice

Page 28

VIE

TA VDC

48 User

Man

ual -

Page

11.0 Warranty

The

VDC-48 is

warranted covering materials and workmanship for a period of two (2) years, as determined by the date of retail purchase (according to the sales receipt from an authorized dealer) or the date of manufacture i

the sales receipt is not available (according to the serial number). This warranty applies to the product; therefore, the remainder of the warranty period will be automatically transferred to any subsequent owner.

his warranty applies only to failure of a VIETA product caused by defects in materials and workmanship during the stated warranty period.

does not apply to a unit that has been subjected to abuse, accident, modification, improper handling/installation, or repairs made without factory authorization

or by

anyone

other

han

authorized

VIETA

Field

Service Stations.

This

warranty

void

the

serial number has been defaced, altered or removed. Products covered by this warranty will be repaired or replaced at the option of VIETA, without charge for materials or labor, provided all the terms of this warranty have been met.

For factory service, please call or email for a Return Authorization (R/A) number before shipping.

the product is shipped, the following information

must be included in the package:

1. Owner’s complete name, daytime phone number, return street address and return authorization number.

2. The serial number of the product being returned and a copy of the retail sales receipt, if possible.

complete description of the problem(s) experienced, including a brief description of how the equipment is being used and other equipments involved.

Page 29

VDC-48 User Manual V1.1

www.vietapro.com