shenzhen baichuan electronics
8121C NOISE GENERATOR
Model-8121C uses a logic circuit to generate “Pseudo-Random Noise”, it is the newest and the most advanced design to generate audio white noise. It has a much flatter frequency response than using a diode. Model-8121C has (1) a White noise source.(2)Weighting filters.(3)Built-in power amplifier.(4)” TRUE RMS ” voltage meter circuit. It can generate five different kinds of the noise spectrum, including White Noise, Pink Noise, and three kinds of “Weighted Noise”, conforms to the following nation’s standards:(1) JIS C5531, IEEE 219, CNS 4785 (2) EIA 426B(3) DIN 45573
| Noise Type :
1. White Noise: -3dB Bandwidth : 20Hz～100kHz Roll off : -24dB / Oct. Flatness : ±1dB 2. Pink Noise: -3dB Bandwidth : 20Hz～20 kHz Roll-off : -24dB / Oct. Crest factor: 4 ( IEEE 219 ) 3. Weighted Noise Ⅰ: Complies IEEE 219, CNS 4785, JIS C5531. 4. Weighted Noise Ⅱ: Complies EIA 426B, 5. Weighted Noise Ⅲ : Complies DIN 45573.
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Voltmeter :
True rms response with Hi / Lo two ranges:
Accuracy: ＜ ± ( 1% rdg. ＋ 1% F.S. ) Amplifier : 1. 100W output is defined at an unclipped maximum output of sine wave. 2.Frequency response : 20 Hz ～ 20 kHz ±0.2dB 20 kHz ～ 100kHz ±1dB 3. Output: With permanent short circuit protection. Load Impedance: ≧3.2Ω |
The weighting filter 8121FT-1 (IEC-268-1)
1、8121FT-1 is the weighting filter made by the IEC-268-1 requirement, it must link with either Model-8121C ， to enable it to generate weighting noise filter that complied with IEC-268-1 requirements, for undergoing the life testing of the loudspeaker and defining the rated power of the loudspeaker
2、When using please take note that: The input signal adopts the Pink Noise and not other signal of noise sources.3、Furthermore, the noise generated from this weighting filter also complies with the filter noise required by the JIS C5532.
