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IMITRE
Issue 2 10/05/2000
Mitre Amplifiers
Operating Instructions
Baldwin Boxall Communications Ltd.
Wealden Industrial Estate, Farningham Road
C O M M U N I C A T I O N S
Crowborough, East Sussex, TN6 2JR
Telephone: 01892 664422 Fax: 01892 663146
Website: www.baldwinboxall.co.uk
Email: mail@baldwinboxall.co.uk
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Summary of Contents for Baldwin Boxall Mitre Amplifiers
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Page 1: Operating Instructions
IMITRE Issue 2 10/05/2000 Mitre Amplifiers Operating Instructions Baldwin Boxall Communications Ltd. Wealden Industrial Estate, Farningham Road C O M M U N I C A T I O N S Crowborough, East Sussex, TN6 2JR Telephone: 01892 664422 Fax: 01892 663146 Website: www.baldwinboxall.co.uk... - Page 2 ITRE ESCRIPTION AND PECIFICATIONS The Mitre range of amplifiers consists of integrated slave and tuner/amplifier models. They are designed to give a high degree of flexibility as well as quality and reliability. Integrated Amplifiers M2000M (Mixer) M2060M (60 Watt), M2120M (120 Watt), M2300M (300 Watt) 1.
- Page 3 SAFETY ’ ’ MPORTANT OTES S AND Ventilation Always ensure adequate ventilation to the amplifier especially the 300 Watt version. Do not obstruct ventilation holes in cover or base. The 300 Watt versions include internal fans that are temperature controlled to prevent overheating, especially if the amplifiers are rack mounted and used for continuous broadcast of music material.
- Page 4 Mitre Integrated Technical Specification MIXER Rated output power 100V line 230V AC supply 60W 166 Ohms 120W 83 Ohms 300W 33 Ohms THD 1 kHz rated output Aux input 230V AC supply Less than 0.5% typically 0.2% Typical output power 1% THD Aux input 230V AC supply 80W 125 Ohms 150W 66 Ohms...
- Page 5 Mitre Tuner Specification FM tuning range 87-108 MHz Sensitivity for 40 dB signal to noise ratio (ref. to ±22.5 kHz) 20 dBµ typical IF frequency 10.7 MHz IF rejection @ 98 MHz 70 dB typical Image rejection @ 98 MHz 80 dB typical AM rejection @ 98 MHz 70 dB typical...
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- Page 7 Mitre Slave 120W 300W The Mitre Slave is equipped with two 0dBM balanced line inputs incorporating a priority switching system. The priority is selected using a two-way dual in line switch. Switch ‘1’ when selected ‘on’ provides input 2 muting when 1 is accessed. Switch ‘2’ when selected ‘off’ enables the first input irrespective of access conditions.
- Page 8 Mitre Slave Technical Specification 120W 300W Rated output power 100V line 230V AC supply 120W 83 Ohms 300W 33 Ohms THD 1 kHz rated output 230V AC supply Less than 0.5% typically 0.2% Typical output power 1% THD 230V AC supply 150W 66 Ohms 360W 29 Ohms Output regulation...
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Page 10: Amplifier Features
ITRE NTEGRATED MPLIFIER EATURES Universal Inputs. Each of the universal inputs has a 6 way DIL switch to select the required facilities as shown below : Note: Each universal input has to be accessed (by linking pins 3 and 4) in order to make the input live. The green LED on the front panel illuminates when an input has been accessed. -
Page 11: System Busy Indicator
Volume Restoration Relay. This relay will energise whenever an input is accessed if the “Vol. Rest / Busy” switch (2) has been selected. The relay contacts can switch either an AC or DC signal providing it does not exceed 100V @ 5A. Here are 3 examples : VOLUME CONTROL... - Page 12 FLOATING LINE OUTPUT CHIME SELECTION SWITCH SWITCH AFTER MASTER NO CHIME & TONE CONTROLS BEFORE MASTER 1 NOTE CHIME & TONE CONTROLS 2 NOTE CHIME NOTE. DO NOT SELECT BOTH SWITCHES TO ON 3 NOTE CHIME CHIME VOLUME 1 2 3 4 ALARM TONE VOLUME ALARM ACCESS, CLOSE TO 0V TO ACCESS...
- Page 13 Alarm Tone Generator. The Alarm Tone Generator is configured when dispatched from the factory to produce a 1 second alternating 500 and 900 Hz Dee-Daa sound. However, it is possible to produce pulsed or continuous single frequency tones which could be used for start and stop work, class change, etc.
- Page 14 Mitre FM / AM Tuner Amplifier. The tuner provides 7 x FM, 7 x AM (MW) and 1 x Aux. programme. Front Panel View. Rear Panel Time Switch Connections FLOATING LINE 0V (GROUND) AUX MUTE OUTPUT CONNECTOR STORE SWITCH VIA FRO NT PANEL HOLE CONNECTOR AM=kH z programme...
- Page 15 ITRE IXER The Mitre Mixer has all of the features of the Mitre Integrated Amplifiers but instead of producing a 100V line output to drive speakers directly, the output is a 0dB balanced line output to drive other amplifiers. The output is presented on two paralleled XLR connectors. - 15 - Issue 2...
- Page 16 Example Installations With Wiring Diagrams. The following drawings show examples of how to connect amplifiers using the numerous facilities included in them. NB. As supplied from the factory a jumper lead is included on the rear of the M2300. This lead energises the four output relays and enables the user to connect to any of the four zoned outputs.
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Page 17: Removing The Cover
600W S BTAINING A INGLE OUDSPEAKER UTPUT FIGURE 7 (Page 24) - 1 Zone of 600W Using 2 Slave Amplifiers Shows how two 300W slaves may be configured to produce 600 Watts into a single load. We do not recommend paralleled outputs because both amplifiers would have to possess identical gain and phase throughout the audio frequency range. - Page 18 - 18 - Issue 2...
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- Page 28 TO RACK MOUNT M2000, REMOVE 2 x No4 SCREWS, REMOVE 3 x M3 SCREWS AND ALIGN RACK BRACKET. REFIT SCREWS AND REPEAT FOR OTHER SIDE. 2U CODE = M2RACK 3U CODE = M3RACK TO WALL MOUNT M2000, REMOVE 3 x M3 SCREWS AND ALIGN WALL BRACKET.
- Page 29 ADDENDUM Please note - The orientation of the six-way plug on pages 10,12 and 14 are reversed. ACCESS CLOSE TO 0V TO ACCESS INPUT. BUSY OPEN COLLECTOR OUTPUT 40V @ 0.5A MAX 0V (GROUND) CLOSES TO 0V WHEN ACTIVE. SEE SWITCH 2 ABOVE. BALANCED SIGNAL INPUT SEE SWITCH 4 ABOVE +24V TO FEED MICROPHONE PRE-AMP,...
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