The "Pseudo Random Noise" with the logic circuit, method for producing audio white noise is the most progressive. Set white noise and pink noise, weighted filter, power amplifier and True RMS voltage meter, a total of four circuits in a body, can use the internal noise source, the external need he weighted filter.

Use:

A. speaker, speaker box, earphone, crossover and other kinds of electro acousticcomponents of a continuous load test.

B. according to the test results to set out by the rated input power measurement ofproduct.

The noise generated by the loudspeaker speaker C. injection, determination ofsound pressure sensitivity (dB value).

D. the machine of pink noise with the audio spectrum analyzer can measure thefrequency response curve of loudspeaker.

Technical parameters

Noise: white noise bandwidth: 20Hz ~ 100 kHz (-3dB

Roll off: -24dB / Oct.)

Flatness: ± 1dB

Pink noise bandwidth: 20Hz ~ 20 kHz (-3dB

Roll off: -24dB / Oct.)

Crest factor: 4 (according to IEEE 219 regulations)

Weighted noise I: in accordance with IEEE 219, CNS 4785, IEC 268-5, JIS C5531

Weighted noise II: in accordance with EIA RS426B

Weighted noise III: in accordance with DIN 45573

Voltage RMS value into Hi / Lo two

Lo: 0 ~ 6 V

Hi: 0 ~ 30 V

Precision < ± (1% rdg. + 0.5% F.S.)

Amplifier a.100W continuous adjustable output (with a maximum output sine waveunclipped.)

The frequency response of the B.: 20 Hz kHz to 20 ± 0.2dB

20 kHz - 100kHz + 1dB

The distortion of the C.: <0.1%

D. short circuit protection circuit, a permanent short circuit will not damage the instrument

E. load impedance: 2 ohm