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 Introduction 

AMA-8511 User Manual (Iss. 03) 

Overview 

The RossGear AMA-8511 AES/EBU Distribution Amplifier and Converter is a broadcast quality 
digital AES/EBU audio reclocking distribution amplifier, as well as a modular product used to convert 
20 or 24 bit AES-3id (coaxial) signals to analog audio.  The AMA-8511 accepts one 32, 44.1, or 
48kHz sample rate AES/EBU audio signal and provides two copies of balanced stereo (A, B) analog 
audio and four reclocked copies of the input signal.  The RossGear AMA-8511 is designed for use in 
75-ohm coaxial SMPTE 276M or AES-3id systems. 

The AMA-8511 provides automatic cable equalization for lengths up to and beyond 610m (2000 ft.).  
The D/A converter uses a state of the art 24bit 128X over-sampled Delta Sigma Modulator DAC to 
convert to analog audio.  Following the D/A conversion, the analog audio passes through a very high 
quality reconstruction filter that assures low distortion and noise.  Two identical copies of the analog 
signal are output via the rear plug-on module, the CON-8516 AES Audio Connector (included with 
the card).  

A coarse level adjustment headroom jumper (18dB or 24dB), and a fine adjustment potentiometer 
(±6dB) are provided to precisely match to your facility’s house reference audio level.  The AMA-8511 
can accommodate any full-scale digital (FSD) level in the -12 to - 30dBFS range.  Automatic detection 
of AES/EBU 50/15

µ

s de-emphasis is available for all data rates.  

The AMA-8511 has been designed with the capability to report a variety of AES signal errors 
including No Lock, Coding, Parity, CRC, and Validity.  These errors are indicated on a card edge 
LED.  In addition, there is a SMPTE 269M fault reporting output to the back of the Ross frame. 

The AMA-8511 fits into Ross 8000A series digital frames, the DFR-8110A (2RU) and the DFR-
8104A (1RU), and provides system builders with the ability to easily distribute and convert digital 
audio within a facility. 

A reclocking amplifier is the preferred method of distribution for long coaxial runs to reduce jitter in 
the data stream.  The AMA-8511 performs reclocking in a two-stage process that develops an output, 
which is stable and noise-free. 

The AMA-8511 is part of a complete line of RossGear AES solutions that includes distribution, 
conversion, and monitoring.  Designed and manufactured to meet the highest quality broadcast 
industry standards, the RossGear AMA-8511 is an ideal, flexible, and cost effective solution for your 
digital audio reclocking distribution and digital to analog conversion requirements. 

Functional Block Diagram 

 

Figure 1. Simplified Block Diagram of AMA-8511 Functions 

Содержание AMA-8511

Страница 1: ...Ross Video Limited AMA 8511 AES EBU Distribution Amplifier and Converter User Manual Ross Part Number 8511D 004 Issue 03...

Страница 2: ...f copyrighted software is prohibited Notice The material in this manual is furnished for informational use only It is subject to change without notice and should not be construed as a commitment by Ro...

Страница 3: ...equipment damage or a situation which could place the equipment in a non compliant operating state ESD Susceptibility This symbol is used to alert the user that an electrical or electronic device or a...

Страница 4: ...th Canadian ICES 003 Cet appareil numerique de classe A est conforme la norme NMB 003 du Canada EUROPE This equipment is in compliance with the essential requirements and other relevant provisions of...

Страница 5: ...ral resources Ross Video encourages you to use the appropriate take back systems These systems will reuse or recycle most of the materials from your end of life equipment in an environmentally friendl...

Страница 6: ......

Страница 7: ...p 2 2 Coarse Level Jumper Setup 2 2 Fine Level Adjustment 2 3 Fault Report Jumper Setup 2 3 Board Installation 2 3 BNC Labels 2 3 Cable Connections 2 4 Audio Levels 2 6 LEDs 2 7 SMPTE 269M Fault Repor...

Страница 8: ...ii Contents AMA 8511 User Manual Iss 03 Ordering Information 6 1 In This Chapter 6 1 AMA 8511 and Related Products 6 1...

Страница 9: ...rminal Equipment family of products backed by Ross Video s experience in engineering and design expertise since 1974 You will be pleased at how easily your new AMA 8511 fits into your overall working...

Страница 10: ...tch to your facility s house reference audio level The AMA 8511 can accommodate any full scale digital FSD level in the 12 to 30dBFS range Automatic detection of AES EBU 50 15 s de emphasis is availab...

Страница 11: ...al rack frame Visual indication of signal presence Visual indication of an error condition SMPTE 269M Fault Reporting 5 year transferable warranty Documentation Terms The following terms are used thro...

Страница 12: ...1 4 Introduction AMA 8511 User Manual Iss 03...

Страница 13: ...ll static discharge precautions as described in the following note ESD Susceptibility Static discharge can cause serious damage to sensitive semiconductor devices Avoid handling circuit boards in high...

Страница 14: ...The following table explains how to make the coarse level selections that determine the desired analog output signal using the headroom jumpers JP1 and JP3 Table 1 AMA 8511 Coarse Level Jumper Settin...

Страница 15: ...t Jumper Setup Select SMPTE 269M Fault Reporting ENABLED or DISABLED via JP4 The default is EN See Chapter 3 SMPTE 269M Fault Reporting for complete details Board Installation Use the following steps...

Страница 16: ...gram in the following figure and discussions The inputs are internally terminated in 75 ohms It is not necessary to terminate unused outputs Figure 3 AMA 8511 BNC and Audio Plug Designations for RossG...

Страница 17: ...0dBFS range To adjust the output level select the approximate dBFS level 18dB or 24dB using the headroom jumpers A Level and B Level and then turn the potentiometers RV1 and RV2 to trim 6dB the analog...

Страница 18: ...not exist above 0dBFS For these reasons the interface between existing analog house reference standards and digital audio standards are as shown in the following table Table 3 Analog House Reference...

Страница 19: ...not lit Input Present LED Error LED Figure 6 AMA 8511 Status LEDs Table 4 AMA 8511 Status LED Indicator Descriptions LED Reference Status Description Input Present Green Indicates presence of an input...

Страница 20: ...2 8 Installation and Setup AMA 8511 User Manual Iss 03...

Страница 21: ...ndition The AMA 8511 module provides a jumper to enable SMPTE 269M fault reporting The card connects by means of an internal interface circuit to an auxiliary telco connector on RossGear 8000 series f...

Страница 22: ...e SMPTE fault reporting set jumper JP4 to DISABLE position Frame Connections The SMPTE 269M Fault Reporting connection on RossGear 8000 series frames is provided by the auxiliary telco connector AUX A...

Страница 23: ...3id SMPTE 276M Sampling Rates 32kHz 44 1kHz 48kHz Input Impedance 75 terminating Connector BNC Input Return Loss 40dB to 6MHz Equalization 610m 2000 ft of Belden 8281 Input Level 1V p p nominal AES In...

Страница 24: ...Frequency Response 20Hz 20kHz 0 25dB 48kHz Signal to Noise Ratio 105dB 22Hz 20kHz AES 17 filter THD 0 04 80dB 20dBFS Reference Levels Headroom Adjustable from 30dBFS to 12dBFS Max Output Amplitude 27...

Страница 25: ...Emphasis 110 5 Source Sampling Rate Locked 0 0 6 7 Sampling Rate User Selectable Set according to current sampling rate 32kHz 11 44 1kHz 10 48kHz 01 0 3 Channel Mode 2 channel stereo 0001 1 4 7 User B...

Страница 26: ...4 4 Specifications AMA 8511 User Manual Iss 03...

Страница 27: ...pheral equipment for signs of trouble 2 Power Check Check the power indicator LED on the distribution frame front panel for the presence of power If the power LED is not illuminated verify that the po...

Страница 28: ...ear AMA 8511 User Manual provides all pertinent information for the safe installation and operation of your RossGear Product Ross Video policy dictates that all repairs to the RossGear AMA 8511 are to...

Страница 29: ...igital Products Frame with Cooling Fan Module and Power Supply PS 8102 1RU holds 4 modules includes 1 power supply DFR 8110A Digital Products Frame and Power Supply PS 8102 2RU holds 10 modules includ...

Страница 30: ...6 2 Ordering Information AMA 8511 User Manual Iss 03 Notes...

Страница 31: ...AMA 8511 User Manual Iss 03 Ordering Information 6 3 Notes...

Страница 32: ...886 After hours Support 613 349 0006 PHONE Fax 613 652 4425 General Information solutions rossvideo com E MAIL Technical Support techsupport rossvideo com Ross Video Limited 8 John Street Iroquois Ont...

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