SPL 1090 User manual

Model 1090
Manual
24/192 AD Converter
Internal, dual-channel AD converter module for SPL units

224/192 AD Converter 1090
Version 1.0 – 1/2011
Designer: Jens Gronwald, Mario Michel
This manual contains a description of the product. It in no
way represents a guarantee of particular characteristics
or results of use. The information in this document has
been carefully compiled and verified and, unless otherwise
stated or agreed upon, correctly describes the product at
the time of packaging with this document.
Sound Performance Lab (SPL) continuously strives to
improve its products and reserves the right to modify the
product described in this manual at any time without prior
notice. This document is the property of SPL and may not
be copied or reproduced in any manner, in part or fully,
without prior authorization by SPL.
SPL electronics GmbH
Sohlweg 80
41372 Niederkruechten
Germany
Tel. [phone]
Fax [phone]
Email: [e-mail]
Website: spl.info
© 2011 SPL electronics GmbH. All rights reserved. Names of other
companies and their products are trademarks of their respective
owners.
Manual 24/192 AD Converter Model 1090

3
24/192 AD Converter 1090
Safety instructions 4
Product features 4
Scope of delivery 5
Installation
General Instructions, Adaptor plate 5
Step-by-step 6
Connections & Operation
SYNC INPUT, Sample Rate 8
Double S/P-DIF output RCA and optical,
Additional input with single-channel devices 9
Technical Specifications 10
Your Notes 11
Content

424/192 AD Converter 1090
•Pleaserefertothesafetyinstructionsinthemanualofthe
unit in which you will be installing the converter.
•Wheninstallingtheconverter,carefullyfollowtheinstruc-
tions beginning on page 5. If you are uncertain, please ask
a qualified technician or your SPL dealer for assistance.
The Analog/Digital Converter Module 1090 is an optional
digital output for compatible SPL units with a plug-and-
play design for easy installation. It offers an S/P-DIF output
with both coaxial and optical connectors in parallel.
The heart of the module is a 24-bit converter with a vari-
able sample rate of up to 192 kHz. Highly accurate quartz
oscillators ensure a clean, low-jitter master clock.
The internal sample rate can be switched between 44.1,
48, 88.2 and 96 kHz. Other sample rates (32, 176,4 and 192
kHz are set by external syncronization.
The converter can be synced to other digital devices via a
S/P-DIF input.
The internal oscillators are automatically disabled when an
external clock signal is present to prevent interference.
An extremely effective voltage stabilizing circuit ensures
that the converter continuously receives sufficient and
stable voltage – an important prerequisite for clean, trans-
parent audio.
The compact design of the input stage guarantees the shor-
test possible signal path to the converter. Overdimensioned
grounding surfaces on both sides of the circuit board effec-
tively reduce interference and ensure optimal separation
between analog and digital components.
Safety Instructions
Product Features

5
24/192 AD Converter 1090
•ADConverterModule1090
•TwoeachM3screws,nutsandwashers
•Adaptorplate
•Manual
The AD Converter Module 1090 is designed strictly as an
option for compatible SPL devices. If you are not a techni-
cian or do not have sufficient experience with electronic
repairs or modifications, we highly recommend that you
ask a technician or your SPL dealer for assistance.
•Before installing the module, discharge any static elec-
tricity by deactivating the ground lift switch on the rear
panel of the respective SPL device and touching the unit‘s
casing.
•Disconnectthepowercableaswellasanyothercables
from the SPL unit.
•Handletheconvertermodulewithcare,avoidingcontact
with the components. Hold the module by the panel or
the edges of the circuit board only. Avoid any force or
pressure when connecting the module to the device.
Adaptor Plate
In some cases the module must be attached to the adaptor
plate using the included M3 screws, washers and nuts
before it can be mounted in the rear-panel option slot on an
SPL device.
Scope of Delivery
General Instructions/Adaptor Plate Installation

624/192 AD Converter 1090
Step 1: Place the converter module on the top of the device
as illustrated. Remove the screws and then the cover of the
option slot on the device‘s rear panel.
Step 2: Remove the strap holding the cable from the inside
of the slot cover. You may have to (carefully) cut through
the silicone drop.
Installation
Sockel
Stecker
Sockel

7
24/192 AD Converter 1090
Steps 3 & 4 (example shown: Channel One)
Step 3: Carefully and without twisting it, plug the cable
from the device into the slot on the converter module. The
plug only fits in one way into the slot.
Step 4: Without turning it, insert the module into the device
(circuit board upwards) and fasten it using the screws from
the optional slot cover.
Your new converter module is now ready for operation.
Installation

824/192 AD Converter 1090
Connections & Operation
SYNC INPUT
The SYNC input allows you to feed an external signal into
the converter to control the sample rate. Please note that
it is not an audio signal input – an AD converter cannot be
used for DA conversions.
Connect an S/P-DIF output from your master source (sound
card, interface) to the SYNC INPUT. The sync signal is
always present, also if no audio signal is present at the
S/P-DIF output.
The 1090 is not equipped to accept Word Clock for synchro-
nization.
If a valid signal is present, the converter automatically
conforms to the sample rate received at the SYNC input. A
yellow LED illuminates to display a valid sync signal. The
internal oscillators are automatically disabled when an
external clock signal is present to prevent interference.
If the sync signal is no longer present (e.g. in the case of a
dropout), the converter automatically reverts to the sample
rate that was previously selected.
Sample Rate Selection
The AD Converter Module 1090 allows you to select one of
the following internal sample rates: 44.1, 48, 88.2 and 96
kHz.
The “44.1/48” button serves to chosse between 44.1 and
48 kHz (not actuated: 44.1 kHz; actuated: 48 kHz). The “x2“
button doubles one of the sample rates that were selected
with the “44.1/48” button – this way you can select 88.2 or
96 kHz respectively.
Other sample rates (32, 176,4 and 192 kHz) can only be
used via external sync signals (see above, SYNC INPUT).

9
24/192 AD Converter 1090
Connections & Operation
Double S/P-DIF output: RCA and optical
The converted signal is routed to both the RCA and optical
output.Bothoutputscanbeusedsimultaneously.
The digital signal is transferred in professional S/P-DIF
format. If the receiving device does not connect properly
with the AD converter module 1090, check if the receiving
device supports professional format (some consumer units
for example do not).
Additional input with single-channel devices
If the AD Converter Module 1090 is installed in a single-
channel SPL device such as the GainStation1, Frontliner,
ChannelOne or TrackOne, the second channel of the
stereo converter can be used via the additional analog
AD converter input on the device‘s rear panel. This allows
you to route two preamps or channel strips through one
converter, or route any other single-channel analog signal
to the converter‘s second channel. For additional infor-
mation please see the manual for the SPL device you are
upgrading.

10 24/192 AD Converter 1090
Technical Specifications
Internal sample rates: 44.1, 48, 88.2, 96 kHz
External sample rates: 32kHz, 176,4 kHz and 192 kHz
Dynamicrange: 112dB(A-weighted)
THD+N(@-1dBFS/1kHz): 0,0007%
Frequencyresponse(48kHz): 10Hz-22kHz,±0.2dB
Jitter (average; 700 Hz-100 kHz): ‹ 300 ps
Stopbandattenuation: -105dB@48kHz;-102dB@96kHz
0 dBFS: =+15dBu
Power consumption +15 V: max. 115 mA
Power consumption -15 V: max. 17 mA
Dimensions (W x H x D): 100 x 27 x 76 mm
(3.94 x 1.06 x 3 in.)
Weight: 68 g (2.39 oz.)

11
24/192 AD Converter 1090
Your Notes
.............................................................
.............................................................
.............................................................
.............................................................
.............................................................
.............................................................
.............................................................
.............................................................
.............................................................
.............................................................

24/192 AD Converter 1090
< Manual 24/192 AD Converter Model 1090