Related Manuals for BRUEL & KJAER 2672
Summary of Contents for BRUEL & KJAER 2672
- Page 1 T ec h nica l Doc ume n a ti on Sound Quality Conditioning Amplifier Type 2672 User Manual Brüel&Kjær 7/6-'89 BE 1461 –11...
- Page 3 Sound Quality Conditioning Amplifier Type 2672 September 1995 Brüel & Kjær Sound Quality Conditioning Amplifier Type 2672 BE 1461 –11 User Manual...
- Page 4 All rights reserved. No part of this publication may be reproduced or distributed in any form or by any means without prior consent in writing from Brüel & Kjær A/S, Nærum, Denmark. 0 − 2 Sound Quality Conditioning Amplifier Type 2672 Brüel & Kjær User Manual...
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Page 5: Table Of Contents
Use with Positioning Frame UA 1324 ................ 4–2 Selection of Input ......................4–3 Charge-injection Calibration ..................4–3 Brüel & Kjær’s Patented Charge-injection Calibration Technique...... 4–3 CIC using Type 2672 ....................4–4 Gain..........................4–4 High/Low......................... 4–4 Overload ........................4–5 0 − 3 BE 1461 –11... - Page 6 Contents Filters........................... 4–5 High-pass ........................ 4–5 DFCF........................4–5 Output.......................... 4–6 5. Specifications ........................5–1 6. Service & Repair ......................6–1 Index 0 − 4 Sound Quality Conditioning Amplifier Type 2672 Brüel & Kjær User Manual...
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Page 7: Introduction
Chapter 1 Introduction BE 1461 –11 Sound Quality Conditioning Amplifier Type 2672 1− 1 User Manual... -
Page 8: About Type 2672
Use with a DAT Recorder To make it easy to use Type 2672 with a SONY PC 204 A DAT recorder, the condi- tioning amplifier has the same case size as the recorder. The two instruments then fit neatly into Guard Frame WU 0484 to form a compact, battery-operated unit. -
Page 9: About This Manual
About this Manual Chapter 2 of this manual describes the switches, connectors, etc. found on the front and back panels of the amplifier. Once you are familiar with Type 2672, you can use this chapter as a quick reference guide. - Page 10 1− 4 Sound Quality Conditioning Amplifier Type 2672 Brüel & Kjær User Manual...
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Page 11: Controls And Connectors
Chapter 2 Controls and Connectors BE 1461 –11 Sound Quality Conditioning Amplifier Type 2672 2− 1 User Manual... -
Page 12: Front Panel
Chapter 2 — Controls and Connectors Front Panel Front Panel Fig.2.1 Front panel of Type 2672 Power On: LED lights when the amplifier is switched on. Batt. Low: LED lights when the battery power is low. 2.1.1 Filters Two 3-position sliding switches for selection of 0.3, 10 or 20 Hz 2nd order high-pass filter for left- and right-hand channels. -
Page 13: Input
4-position sliding switch for selection of the signal to use for charge-injection calibration (CIC) of Head and Torso Simulator Type 4100. The signal is applied to both Preamp. inputs (see Fig.2.2). Settings are: BE 1461 –11 Sound Quality Conditioning Amplifier Type 2672 2− 3 User Manual... -
Page 14: Output
Battery release: Releases the battery pack for replacing the battery. 2.2.2 Power Power on/off switch. Fuse: 2 A fuse for protection of Type 2672 when using an external power supply. 2− 4 Sound Quality Conditioning Amplifier Type 2672 Brüel & Kjær... - Page 15 2-pin connection for use with 12 – 20 V, 400 mA external power supply. Pin designations are given in Fig.2.4. Negative Positive (12 V to 20 V DC) 950743e Fig.2.4 Pin designations for external power connector (external view) BE 1461 –11 Sound Quality Conditioning Amplifier Type 2672 2− 5 User Manual...
- Page 16 2− 6 Sound Quality Conditioning Amplifier Type 2672 Brüel & Kjær User Manual...
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Page 17: Preliminary
Chapter 3 Preliminary BE 1461 –11 Sound Quality Conditioning Amplifier Type 2672 3− 1 User Manual... -
Page 18: Environmental
3.2.2 External Power Supply Any external supply connected to Type 2672 must supply 12 – 20 V DC and be capable of supplying 400 mA. This can be achieved using, for example: Brüel & Kjær Mains Adaptor WB 1375 a (100 to 127 V AC) or WB 1376 a (200 to... -
Page 19: Fuse
Cable WL 1192. 3.2.3 Fuse Type 2672 has a T 2 A fuse (Brüel & Kjær order no. VF 0010) to protect it when using an external power supply. You can remove the fuse using a small screwdriver or a coin (Fig.2.3). - Page 20 3− 4 Sound Quality Conditioning Amplifier Type 2672 Brüel & Kjær User Manual...
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Page 21: Using Type 2672
Chapter 4 Using Type 2672 BE 1461 –11 Sound Quality Conditioning Amplifier Type 2672 4− 1 User Manual... -
Page 22: Use With A Dat Recorder
1. Unscrew the two screws in the side panel of Type 2672. 2. Use the 4 mm screws supplied with Type 2672 to mount the guard frame on the amplifier. 3. Unscrew the four screws in the side panel of the DAT recorder (the four screws closest to the back panel). -
Page 23: Selection Of Input
Chapter 4 — Using Type 2672 Selection of Input Selection of Input When you are using a Head and Torso Simulator (HATS) to record binaural sound, the input to use depends on whether you are using Type 4100 or Type 4100 D: Type 4100 uses Microphones Type 4190 with Preamplifiers Type 2669 L –... -
Page 24: Cic Using Type 2672
Gain 4.5.1 High/Low Type 2672 has a wide range of gain settings (–20 to + 50 dB) to allow the recording of a wide range of sounds. When you record a sound, you first record a calibration signal of, for example, 94 dB. If the sound you are recording is at a much lower level, you may want to increase the gain setting to obtain a better recording. -
Page 25: Overload
flat, and normalisation is usually required. This is achieved by equaliza- tion in Type 2672 (DFCF On), before the signals are processed and recorded on a DAT recorder, and can improve the signal-to-noise ratio by as much as 10 dB in the frequency range 2 –... -
Page 26: Output
User Manual for Types 4100 and 4100 D. The filter matches Falcon range microphones Types 4189 and 4190. Output Signals are output from Type 2672 via BNC connectors. The outputs are electroni- cally semi-balanced. Care should be taken with earthing/grounding arrangements to avoid the introduction of unwanted noise. 4− 6 Sound Quality Conditioning Amplifier Type 2672 Brüel &... -
Page 27: Specifications
Chapter 5 Specifications BE 1461 –11 Sound Quality Conditioning Amplifier Type 2672 5− 1 User Manual... - Page 28 SIGNAL OUTPUT: IEC 68–2–6: Vibration: 0.3 mm, 20 m/s , 10–500 Hz BNC connectors; semi-balanced IEC 68–2–27: Shock: 1000 m/s IEC 68–2–29: Bump: 1000 bumps at 250 m/s 5− 2 Sound Quality Conditioning Amplifier Type 2672 Brüel & Kjær User Manual...
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Page 29: Service & Repair
Chapter 6 Service & Repair Sound Quality Conditioning Amplifier Type 2672 should provide many years of reli- able operation. However, if a fault occurs which impairs its correct function or operating safety, then immediately disconnect it from its power source and remove it from the instrument set-up to secure against unintended operation and prevent the risk of further damage. - Page 30 6− 2 Sound Quality Conditioning Amplifier Type 2672 Brüel & Kjær User Manual...
- Page 31 Dir./CCLD ..............2–3 Direct input ..............2–3 Microphone polarization voltage ......... 2–3 Electromagnetic compatibility ........3–2 Operating temperature ..........3–2 Equalization ..............4–5 Output ..............2–4 4–6 BE 1461 –11 Sound Quality Conditioning Amplifier Type 2672 Index – 1 User Manual...
- Page 32 Preamp................2–3 Preamplifier input ............2–3 UA 1324 ................4–2 Recorder ................ 4–2 with a DAT recorder ..........4–2 Repair ................6–1 with Positioning Frame UA 1324 ......4–2 Index – 2 Sound Quality Conditioning Amplifier Type 2672 Brüel & Kjær User Manual...
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