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2-2

Microphone Ports

CAL291 Refernce Manual

Microphone Ports

The microphone ports are on two opposite faces of an
aluminum block mounted on one end of the CAL291, as
shown in Figure 2-2.

FIGURE 2-2  Aluminum Block with Microphone 

Ports

Содержание CAL291

Страница 1: ...I291 01 REV B Larson Davis CAL291 Technical Reference Manual...

Страница 2: ...is subject to change without notice and should not be construed as a commitment or representation by PCB Piezotronics Inc This publication may contain inaccuracies or typographical errors PCB Piezotro...

Страница 3: ...I291 01 REV B...

Страница 4: ...2 Description 2 1 General Description 2 1 Microphone Ports 2 2 End Plate 2 3 Connectors 2 3 Input 2 3 Power 2 3 Chapter 3 Operation 3 1 Powering the CAL291 3 1 Input Signal 3 1 Microphone Placement 3...

Страница 5: ...3 chapters and 1 appendix covering the following topics Chapter 1 Introduction Orients the user to the contents of this user manual and the features functions and measurement capabilities of the CAL29...

Страница 6: ...of signals for verification of the amplitude phase accuracy of multi channel acoustic measurement systems Amplitude Phase Normalization The digital filters of the Larson Davis analyzers provide both a...

Страница 7: ...arson Davis Inc at 801 375 0177 If you have not already done so please record your instrument s serial number located on the bottom of the instrument and the purchase date You may be asked to give thi...

Страница 8: ...1 4 Accessories CAL291 Refernce Manual...

Страница 9: ...ented in Chapter 3 Operation on page 3 1 General Description The CAL291 has a flat shape factor for optimal use on a table or desktop In use the sound intensity probe of the intensity measurement syst...

Страница 10: ...orts CAL291 Refernce Manual Microphone Ports The microphone ports are on two opposite faces of an aluminum block mounted on one end of the CAL291 as shown in Figure 2 2 FIGURE 2 2 Aluminum Block with...

Страница 11: ...lectrical input connector DC power connector and fuse are located on the end plate as shown in Figure 2 3 FIGURE 2 3 CAL291 End Plate Connectors Input BNC Female Power 2 5 X 5 5 mm coaxial connector c...

Страница 12: ...2 4 End Plate CAL291 Refernce Manual...

Страница 13: ...nnect to the AC power cable to main power and the DC output to the power connector on the end plate of the CAL291 Press the upper portion of the power switch I to switch on the CAL291 and press the lo...

Страница 14: ...perating manual for the probe remove the space and spread the microphones far enough apart that they can be placed over the microphone port block Do not remove the microphone grid caps Slide them firm...

Страница 15: ...ion less than 1 the sound pressure level at the microphones should be kept within the range of 25 dB 121 dB 1 kHz Adjust the signal generator output to obtain a sound pressure level at the microphones...

Страница 16: ...to equal amplitude signals with zero phase difference between them within the limits of the device Thus any variation of the magnitude of the transfer function between channels from unity 0 dB and of...

Страница 17: ...CAL291 Refernce Manual Amplitude Phase Normalization 3 5...

Страница 18: ...ntensity test device specifications as pre sented in IEC 1043 1993 Instruments for the measurement of sound intensity and ANSI S1 9 1996 Instruments for measurement of sound intensity Input Input Conn...

Страница 19: ...ength 25 6 cm 10 3 in Width 10 0 cm 4 0 in Height 5 3 cm 1 1 in Weight 1 0 kg 2 2 lb Power D C Power 9 16 Vdc 400 mA provided by PSA004 DC Power Supply included 90 240 VAC 50 60 Hz Frequency Hz Output...

Страница 20: ...CAL291 Reference Manual Power A 3...

Страница 21: ...1 2 Unpacking and Inspection 1 3 Accessories 1 3 D Description 2 1 End Plate 2 3 General 2 1 O Operation 3 1 Amplitude Phase Normalization 3 4 Input Signal 3 1 Microphone Placement 3 2 Poweriing the...

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