Cobalt Digital Inc. 9241 Universal Analog Audio Distribution Amplifier Owner’s Manual Cobalt Part Number: 9241 V.1.6 9241 Manual V.1.
9241 • Universal Analog Audio Distribution Amplifier Cobalt Digital Part Number: 9241 • • Version 1.6 Printed in the USA The information contained in this Owner’s Manual is subject to change without notice or obligation. Copyright © 2013 Cobalt Digital Inc. All rights reserved. Contents of this publication may not be reproduced in any form without the written permission of Cobalt Digital Inc. Reproduction or reverse engineering of copyrighted software is prohibited.
Important Regulatory and Safety Notices Before using this product and any associated equipment, refer to the “Important Safety Instructions” listed below so as to avoid personnel injury and to prevent product damage. Products may require specific equipment, and /or installation procedures be carried out to satisfy certain regulatory compliance requirements. Notices have been included in this publication to call attention to these Specific requirements.
EMC Notices US FCC Part 15 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.
Environmental Information The equipment that you purchased required the extraction and use of natural resources for its production. It may contain hazardous substances that could impact health and the environment. To avoid the potential release of those substances into the environment and to diminish the need for the extraction of natural resources, Cobalt Digital Inc. encourages you to use the appropriate take-back systems.
Introduction This chapter contains the following sections: • Overview • Functional Block Diagram • Features • Documentation Terms Overview The 9241 is an analog audio distribution amplifier designed for broadcast use. It can be used as either a mono or two channel (stereo) audio DA. When used as a mono DA it can provide eight copies of the single (mono) input signal or four copies each of the two (stereo) inputs.
Features The following features make the 9241 the best solution for analog audio distribution. • Handles mono or stereo signals • Has summing capability • Silence detection • 5 year warranty • Fits openGear 8310/8321 series frames Documentation Terms The following terms are used throughout this guide: • “Frame” refers to the 8310 or 8321 frame that houses the 9241 card. • “Operator” and “User” refer to the person who uses the 9241.
Installation and Setup This chapter contains the following sections: • Static Discharge • Unpacking • Rear Module Options • Board Installation Static Discharge Whenever handling the 9241 and other related equipment, please observe all static discharge precautions as described in the following note: ESD Susceptibility Static discharge can cause serious damage to sensitive semiconductor devices.
Rear Module Installation (Optional) If you are installing the card into a slot with no rear module, you should have ordered and received one rear module. You will need to install it in your frame before you can connect cables. Use the following steps to install a rear module in an openGear frame: 1. Refer to the openGear frame Owner’s Manual, to ensure that the frame is properly installed according to instructions. 2. On the rear of the frame, locate the card frame slot. 3.
Rear Modules RM20-9241-B RM20-9241-C/S RM20-9241-D/S The rear modules shown below provides the input/output connections shown. Split rear modules provide connections for two cards in adjacent slots using one rear module. Note: Screen legends may not agree with connections shown here. Use the labeling shown here. Note: The RM20-9241-C/S and RM20-9241-D/S rear modules are usable only with the 20-slot frame. RM20-9241-B rear module available for 8310-series (10-slot frame) as part number RM-9241-B.
User Controls This chapter contains a description of the 9241 user controls: • LEVEL CONTROLS • LEDs • DIP Switch Settings • Remote Control . Figure 4. Card-edge User Controls Level CH1 and CH2 The level controls are used to adjust the output levels of the 9241. When using the 9241 as a mono DA CH1 level control is used. When using the card as a stereo DA both CH1 and CH2 controls are used. These ten turn potentiometers give precise control of the output signal over a 30 dB range.
LEDs The front-edge of the card features LEDs that display the status of the input signals. Descriptions are provided in the following table: LED Color Location Display and Description CH1 Green Top of the card When illuminated there is a valid analog signal at input CH1. Green Second from the top When illuminated there is a valid analog signal at input CH2. CH2 COM Green Third from the top When on indicates that communications on the CAN bus is operating properly Table 1.
DIP Switch Settings SW1-1 ON SW1-2 SW 2 SW 3 OFF Figure 5. Card-edge User Controls Switch Mode SW1-1, SW1-2 (Audio mode) SW1-1 OFF OFF ON ON ON SW2 (Power-up defaults) SW3 (Card edge control enable) OFF ON OFF SW1-2 OFF ON OFF ON Stereo DA (Dual 1x4) Mono Mix (Sum CH1 and CH2) Mono DA (CH1 > 1x8) Reserved Get card parameters from non volatile memory, ignore dip switch settings. (Configurable with DashBoard Control system) Get card parameters from the DIP switch Card edge control enabled.
REMOTE CONTROL DashBoard Control This card may be monitored or controlled by a remote computer through DashBoard the free configuration monitoring software available to openGear users. With DashBoard installed on your computer the following menus are available when interrogating an 9241 card: MENU Card Info ITEM DISPLAY DESCRIPTION Product 9241 Product identification code (Read Name Analog Audio Distribution Amplifier Product functional description Only) Supplier Cobalt Digital Inc.
MENU ITEM Card Silence Detection Time Interval Settings DROP DOWN SELECTION Range from OFF to 45 seconds in 5 second intervals (Drop down selection) DESCRIPTION Sets the time interval allowed for no signal present or signal below threshold before alarm is activated The default is off ie. as soon as signal falls below threshold alarm is set Silence Detection Threshold (dBu) Range from – 20 to -60 dBu in 5 dBu increments Sets the threshold below which the signal is considered lost.
Specifications Technical Specifications INPUT Greater than 20K Ω balanced Greater than 80dB, 20Hz to 20kHz +27.5 dBu Input Impedance Common Mode Rejection Maximum Input Level PERFORMANCE Gain Frequency Response Noise Harmonic Distortion -14dB to +18dB continuously variable ± 0.1dB from 20Hz to 20kHz Better than -95 dBu, 20Hz to 20kHz at unity gain Less than 0.
Warranty and Service Information Warranty and Repair Policy Cobalt Digital Inc. Limited Warranty This product is warranted to be free from defects in material and workmanship for a period of five (5) years from the date of shipment to the original purchaser, except that 4000, 5000, 6000, 8000 series power supplies, and Dolby® modules (where applicable) are warranted to be free from defects in material and workmanship for a period of one (1) year. Cobalt Digital Inc.
Ordering Information Standard Equipment • 9241 Universal Analog Audio Distribution Amplifier Optional Equipment • 9241-OM Universal Analog Audio Distribution Amplifier Owner's Manual (additional User Manual) • RM-9241-B Rear Module (for installation into 8310-C frame) (Standard Width) 2 Differential Analog Audio In, 8 Differential Analog Audio Outs • RM20-9241-B Rear Module 8321 Frame Rear I/O Module (Standard Width) 2 Differential Analog Audio In, 8 Differential Analog Audio Outs • RM20-9241-C/S
Contact Us Contact our friendly and professional support representatives for the following: • Name and address of your local dealer • Product information and pricing • Technical support • Upcoming trade show information General Business Office and Technical Support Fax General Information Technical Support PHONE E-MAIL POSTAL SERVICE Cobalt Digital Inc. 217 • 344 • 1243 217 • 344 • 1245 sales@cobaltdigital.com support@cobaltdigital.com 2406 E. University Ave.
