Agilent Technologies 35670A User Manual

To calibrate a microphone
If you want to accurately measure an acoustic signal, you must enter a calibration
factor that tells the analyzer how much voltage is produced at a microphone’s output
for a given sound pressure level. In the Agilent 35670A, you enter this factor with the
Transducer (Xdcr) Unit softkeys—located under the [
Input
] hardkey.
1 Initialize the analyzer.
Press [
Preset
][
DO PRESET
].
Press [
Inst Mode
][
OCTAVE ANALYSIS
].
Press [
CHANNELS 1 2
] (or [
CHANNELS 1 2 4
]) to highlight the number of channels you
want activated.
Press [
Meas Data
], then press [
CHANNEL 1 2
](or[
CHANNEL 1 2 3 4
]) to highlight the
channel whose microphone you will calibrate.
Press [
PWR SPEC CHANNEL x
] to display the microphone output in the active trace.
2 Match the active trace’s display unit to the calibrator’s output unit.
Press [
Input
], then press [
CHANNEL 1 2
] (or [
CHANNEL 1 2 3 4
]) to highlight the channel
whose microphone you will calibrate.
Press [
XDCR UNIT CHx SETUP
][
XDCR UNIT LABEL
][
Pascal
].
Press [
Rtn
], then press [
XDCR UNIT ON OFF
] to highlight ON.
Press [
Trace Coord
][
Y UNITS
][
EU
].
Press [
AMPLITUDE PK PP RMS
] to highlight RMS.
Press [
dB REF SETUP
][
dBSPL (20 uPa)
].
3 Connect the microphone adapter and microphone as described in the preceding tasks,
then insert your microphone in the calibrator.
Calibrator.
Option AY6
Agilent 35670A
Measuring Sound Operator's Guide
3-4

Agilent Technologies 35670A Specifications

General

Brand	Agilent Technologies
Model	35670A
Category	Measuring Instruments
Language	English