MARIAN ADCON User manual

ADCON
User’s Guide

The ADCON conforms the following standards:
EN 55022: 1998 + A1: 2000 + A2: 2003; class A
EN 55024: 1998 + A1: 2000 + A2: 2003; class A
In order for an installation of this product maintain compliance with the limits of a class
A device, shielded audio cables must be used, not longer than 50 cm. Attention: This is
a device of the class A and can cause interference to radio or television reception
within the residential area. The user is encouraged to try to correct the interference by
suitable measures.
© April 2007, Marian, v1.07
Hardware Design by Marian
User’s Guide by Wilke Pfannkuch – Hamburg, Germany
This User’s Guide is copyrighted. All rights reserved. No part of this User's Guide may be reproduced
or transmitted in any form or by any means, electronically or mechanically, including photocopy,
translation, recording, or any information storage and retrieval system, without prior and expressive
permission in writing from Marian.
All trademarks are the property of the respective owners.
Marian is not liable for any damage and costs resulting from it, which are caused by improper handling
or installation of the device.
Technical changes are reserved.

Table of Contents
1. Scope of Supply 2
2. Ports and Operating Elements 3
2.1. Front Side 3
2.1.1. Using Microphones for Ports on the Front Side 4
2.2. Back Side 5
3. Operation 6
3.1. Rack Installation 6
3.2. Power Supply 6
4. Technical Data 7
5. Service and Support 7

2
Dear User,
thank you very much for your decision to purchase ADCON as high-
quality ADAT converter. We wish you lots of success in working with
our product.
Please consider taking 10 minutes to study this guide. Besides
traditional installation and operation instructions it contains information
about synchronization and operation of ADCON that will make the
handling with the device easier for you.
Your ADCON provides some special characteristics. In the following
you will get a short overview:
- Balanced inputs and outputs
- Individually switchable input level: –10 dBV or +4 dBu
- Additional input jacks of channels 1 and 2 on the front side
For inputs 1 and 2 on the front side:
- Microphone pre-amplifier
- Phantom power supply
- Gain Level control
1. Scope of Supply
First of all, please check, whether you received the following
components undamaged and complete:
- ADCON, ADAT converter
- Power supply with cable
- User's Guide
Please send back the device with possibly existing damage to the
supplier only after notifying the transportation company and the
sender, otherwise you will lose your claim for damages.

2. Ports and Operating Elements
2.1. Front Side
Analog Inputs “In 1” and “In 2”
The analog inputs on the front side are identical to the analog
inputs 1 and 2 on the back side. They are especially suitable
for microphones. You can insert ¼’’ TRS plugs as well as XLR
plugs into the input jacks.
If there is a plug inserted in the analog input jack 1 and/or 2 on
the back side, the according input on the front side is switched
off.
“Clip” LED
The active “Clip” LED shows that the AD converter is not able
to process present input signal - the signal level is to high. The
LED only works if the inputs on the front side are used.
“Gain” Level Control
Using the level control you are able to set the level for the
inputs on the front side ranging between +5 dB and +45 dB.
Please note, that the input level decreases as soon as you
insert a ¼’’ plug into the front side inputs. The range of
the level control decreases accordingly. You set the level
in the range between -15 and +25 dB.
3

“Phantom” Switch
Using this switch you can power on/off the phantom power
supply for the inputs on the front side. The activity of the
phantom power supply is indicated by the “+48V” LED
described in [5].
“+48V” LED
The “+48V” indicates that the phantom power supply for the
inputs on the front side is powered on.
“Mode” Switch
The “Mode” switch changes the operation mode of your
ADCON:
In the “48 kHz AD” position the ADCON works as clock
master. The internal clock operates using 48 kHz. In this
switch position the device exclusively converts the analog
input signals into an ADAT output signal.
In “44.1 kHz AD” position the ADCON also works as clock
master using only 44.1 kHz. In this case the analog input
signals are also converted into an ADAT output signal.
In “AD/DA” position, the ADCON synchronizes to the sampling
rate of the existing ADAT signal and works as clock slave.
Here it converts the incoming ADAT signal into analog output
signals and the analog input signals into ADAT output signal.
“Lock” LED
This LED illuminates if a valid signal exists in switch position
“AD/DA” at the ADAT input and the ADCON synchronizes to it.
2.1.1. Using Microphones for Ports on the Front Side
If you would like to use microphones for the ports on the front
side, please connect them only when the ADCON is switched off.
Otherwise this may lead to interfering impulses, which could
cause damage to the electronics of the ADCON, loud speakers or
other devices!
Please note that the phantom power supply is only powered on, if
microphones are connected which require a phantom power
supply of +48 V!
4

2.2. Back Side
Analog Inputs 1-8
Devices are connected to the analog inputs using balanced
cables, which are equipped at the ADCON side with ¼’’ TRS
plugs. They can also be connected using non-balanced cables
with a ¼’’ TS plug.
Level Switch for Analog Inputs
Using this switch you can switch the input level of the analog
inputs between –10 dBV and +4 dBu. For information about
which level is used by the device, please refer to the
appropriate manual.
ADAT Input
A device is connected to the ADAT input using an optical
cable with TOSLINK plug.
When using optical cables, please ensure that they are
free of breaks and damage, because this may lead to
failures! Please do not use any optical cables longer than
2 meters!
Analog Outputs 1-8
Devices are connected to the analog outputs using balanced
cables, which are equipped at the ADCON side with ¼’’ TRS
plug. They can also be connected using non-balanced cables
with a ¼’’ TS plug.
The ADCON automatically recognizes whether a balanced
or non-balanced cable is used and adjusts the level
accordingly!
5

Level Switch for Analog Outputs
Using this switch you can set the output level of the analog
outputs between –10 dBV and +4 dBu. For more information
about the suitable level for the device to be connected, please
refer to the appropriate manual.
ADAT Output
The connection of a device to the ADAT output is performed
using an optical cable with TOSLINK plug.
Power Supply
Please insert the cable of the supplied mains plug in order to
provide the ADCON with voltage.
3. Operation
3.1. Rack Installation
The ADCON requires 1 RU for the 19” rack installation. Please note
that 15 cm will have to remain for reverse ports.
Please ensure sufficient air supply and avoid external thermal
influences in order to protect the ACDON from overheat.
The ADCON has a size of only 9.5”, therefore you will require an
appropriate fitting kid for the installation when using the entire width of
the rack. The fitting kid is available in specialized stores. For questions
please contact our support.
3.2. Power Supply
Please connect the ADCON to the plug described as element [7] in
section 2.2. using the provided power supply to a mains plug (230 V).
6

7
4. Technical Data
- 8 balanced analog inputs (1/4’’ TRS jacks)
- 8 balanced analog outputs (1/4’’ TRS jacks)
- 1 ADAT input (optical / TOSLINK)
- 1 ADAT output (optical / TOSLINK)
- Input impedance: 10 kOhm
- Output impedance: 600 Ohm
- Sample format : 24 Bit
- Sample rates: 44.1 kHz, 48 kHz
- Frequency response @ 44,1 kHz: 20 Hz to 20 kHz
- Frequency response @ 48 kHz: 20 Hz to 20 kHz
- Input and output level: -10 dBV; +4 dBu; individually switchable
- Signal-to-noise ratio AD: 104 dB(A)
- Signal-to-noise ratio DA: 114 dB(A)
- Rattle factor: 0.005%
- Power supply: 10 W
- All inputs with 6dB headroom
- Dimensions (WxHxD) in mm: 218x42x125
On the front side:
- 2 balanced analog inputs on the front side (combination jack for XLR
plugs and ¼’’ TRS plugs)
- Input impedance ¼’’ jack: 20 kOhm
- Input impedance XLR jack: 2 kOhm
- Level adjustment: +5 dB to +45 dB (XLR), -15 dB to +25 dB (1/4’’
jack)
- Phantom supply: 48 V
5. Service and Support
Should you have any questions or problems during the installation or
operation of your ADCON please perform the following steps:
1. Have a look in our Audio Guide, which has been published on the
internet, whether you can find a solution to your problem. Please
refer to the following site:
www.marian.de
2. If any questions still remain, you can contact us via the internet
using our support form at:
www.marian.de/en/support
or give us a phone call:
[phone]