BBE Sound 262 Manual de usuario descargar pdf (Pagina 6)

MED ASSO C IAT E S I NC. ANL- 940 - 1 U L TR ASO NI C M I CRO PH ONE AND AMPL I FIE R

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MED Associates, Inc.

CHAPTER 3

Operation

Two output settings are available ‘DIRECT’ and ‘LPF’. LPF applies a low-pass filter to the output signal

with a cutoff frequency of 100 KHz for use as an anti-aliasing filter. The front panel has an access for the

calibration screw marked ‘CAL.’ This calibration screw adjusts the overall gain of the amplifier . The ANL-

940-1 has been pre-calibrated at the factory. Do not adjust the instrument gain if you will be using the

ANL-940-1 to quantify the actual amplitude (dB) of rodent vocalization. Refer to Appendix A for more

information regarding measurement of sound pressure level amplitud es.

1. Place the microphone over the chamber

The microphone should be centered over desired location, and pointing at the subject of interest. The picture in

Figure 3.1 shows a typical setup for mouse open field ultrasonic vocalization.

Figure 3.1 – Microphone Placed Over Cage (Microphone Support Not Included)

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BBE Sound 262 Manual de usuario Pagina 6