shenzhen baichuan electronics
AUDIO SWEEPER 7116C
7116C provides a pure sine wave with very low total harmonic distortion. (approx. 0.1% THD ). The total harmonic distortion of 7116C consists of the 2nd Harmonic component only and nearly without higher order harmonic components. So, 7116C is very suitable for testing the sound quality ( spurious noise inspection ) of all kinds of loudspeakers, headphones, receivers, piezo, speakers systems…etc.
The frequency produced by 7116C is more stable than the ordinary beat frequency oscillator produced. and the sine wave provided by 7116C is purer than the ordinary function generator. Therefore, 7116C has the advantages of low distortion and high stability. do not use the ordinary function generator to test the spurious noise ( rattle and buzz ) of the loudspeaker, loudspeaker, receiver, etc.… Because users will easily neglect the prohibited spurious noise caused originally by the high-order distortion component of the function generator.
Model – 7116C
Freq. Range : 20Hz～20 kHz in one range.
Freq. Response: ≦±0.25dB, 20Hz～20 kHz.
Sweep Mode: Manually or automatically log. sweep in one range. Setting spot ( random ) frequency also available.
Signal: Sine wave, THD≦0.15%, (0.1% Typical.)( 20Hz ～ 20 kHz.)
Sweep Time: 0.3～40 seconds continuously adjustable.
Frequency Counter: 4 digits display.
Resolution: 1 Hz.
Accuracy: ± 1 Hz.
Load Impedance: ≧ 3.2 Ω.
Voltmeter: 3¾ digits, Auto-ranging.
Low Range: 0.000v ～3.300v.
Resolution: 0.001v
High Range: 3.300v ～40.00v.
Resolution: 0.01v.
Accuracy: ± 0.6% of reading ± 2dgts.
Dimension : 36 (L) ×27 (D) ×13 (H) cm.
Net Weight :
7116C ( 20W ): 6 KGS. ( Approx.)
7116C ( 60W ): 8 KGS. ( Approx.)
7116C ( 100W ): 10 KGS. ( Approx.)
Built-in Amplifier output voltage :
7116C ( 20W ) 7116C ( 60W ) 7116C ( 100W )
8 Ohms 0 ~ 12.6 V 0 ~ 22.0 V 0 ~ 28.3 V
4 Ohms 0 ~ 9.0 V 0 ~ 15.5 V 0 ~ 20.0 V
Loudspeaker Polarity Tester 139B
Even in a very noisy environment, Model-139B still can determine quickly and precisely the positive and negative polarity of a loudspeaker、headphone、receiver, and every single unit in a loudspeaker system. Model-139B also includes 3 sets of external input terminals and selectors which can be used to combine with other instruments, to measure the other features of a loudspeaker simultaneously. It is quite suitable for 100% Q.C. testing for loudspeakers in the production line.