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MVPA/VPA Amplifier User Manual

Page 1 of 11

21015 V1.1

Audix Systems

Station Road,
Wenden,
Saffron Walden,
Essex,
CB11 4LG.
Telephone: +44(0)1799 540888
Facsimile: +44(0)1799 541618
www.tycosafetyproducts-europe.com
www.audixsystems.co.uk

MVPA / VPA Amplifier

Manual V1.1

Summary of Contents for MVPA

Page 1: ...l Page 1 of 11 21015 V1 1 Audix Systems Station Road Wenden Saffron Walden Essex CB11 4LG Telephone 44 0 1799 540888 Facsimile 44 0 1799 541618 www tycosafetyproducts europe com www audixsystems co uk MVPA VPA Amplifier Manual V1 1 ...

Page 2: ... should not be considered as a sole source of technical instruction replacing good technical judgement since all possible situations cannot be anticipated If there are any doubts as to exact installation configuration and or use call Audix Systems at 44 0 1799 540888 ACKNOWLEDGEMENTS All trademarks are recognised Technical Support In the unlikely event of you having problems with your Amplifier pl...

Page 3: ...4 1 2 AMPLIFIER INTRODUCTION 4 1 3 AMPLIFIER SLEEP MODE 5 1 4 AMPLIFIERS CHASSIS FRONT PANEL DISPLAYS 5 1 5 AMPLIFIER ADJUSTMENTS LINK SETTINGS 5 1 6 AMPLIFIER PANEL ARRANGEMENT MVPA1202 8 2 SAFETY CONSIDERATIONS 9 2 1 Safety Considerations for System Maintenance 9 2 2 Electrical Hazards 9 2 3 Heat Hazards 10 2 4 Weight Hazards 10 3 MAINTENANCE 10 ...

Page 4: ... 85 C Audio Electrical Characteristics Input Impedance 10K ohms nominal electronically balanced Input Sensitivity 0dBu 775mV for rated power Power Bandwidth 3dB 100Hz 20Khz Distortion THD Less than 1 at rated power typically less than 0 08 at 1Khz Noise 80dB max Fault Monitoring Built in monitoring circuitry Fitted in MVPA models only Detection and display of individual PowerBloc Fail Mains Fail B...

Page 5: ...240 Watts R M S A rack mounting chassis power supply occupying 3U of space holds up to four PowerBloc modules which may be arranged as four totally independent 60 watt amplifiers or in any of ten other output configurations see paragraph 1 2 Amplifier model range for details Using proven MOSFET circuit techniques results in an efficient and extremely reliable power amplifier The amplifiers are pro...

Page 6: ...fiers without missing the first part of the signal During normal speech announcements or alarms only the amplifiers selected for broadcast wake up In this case the wake up is initiated by the audio at the input terminals of each amplifier This ensures that any amplifiers NOT being used for broadcast remain in sleep mode 1 4 Amplifiers chassis Front Panel Displays Faults can be detected and display...

Page 7: ...015 V1 1 VR1 Not fitted VR2 Quiescent Current Front panel mounted lockable gain adjustment controls can be fitted optional to each Master PowerBloc This allows user adjustment of audio levels during system commissioning which can be locked once set ...

Page 8: ...ctory set at 30 seconds J2 Jumper not fitted if amplifier fitted in slot position 1 J3 Jumper not fitted if amplifier fitted in slot position 2 J4 Jumper not fitted if amplifier fitted in slot position 3 J5 Jumper not fitted if amplifier fitted in slot position 4 CHG Fitted if system includes a battery charger BATT Fitted if system includes back up batteries Important Note The current amplifier Po...

Page 9: ...MVPA VPA Amplifier User Manual Page 8 of 11 21015 V1 1 1 6 Amplifier Panel Arrangement MVPA1202 AUDIX SYSTEMS Ω Ω ...

Page 10: ...25AH The amplifier should not be exposed to dripping or splashing and any liquids 2 1 Safety Considerations for System Maintenance Only a qualified and trained electronics engineer should be permitted to make any type of adjustment or repair to the Public Address or Voice Alarm System The following safety factors should be considered before attempting to maintain or repair an amplifier Electrical ...

Page 11: ...ollowed Approximate frame weight is 14 16Kg s Depending on particular model 3 Maintenance Although MVPA amplifiers require little or no maintenance the Public Address or Voice Alarm system to which it is installed may require regular scheduled maintenance For BS5839 compliant Voice Alarm systems please refer to BS5839 Part 1 Code of practice for system design installation and servicing for recomme...

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