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Hi We need to specify a cable for carrying power as well as data to approximately 10 Km distance. For data transmission over such long distances we have selected single mode fibre. For power transmission we have to select conductors of proper gauge, transmission type like AC or DC, no of...

Thanks for reply. Do you have any SBC in mind which may be useful for me?

Thanks for useful suggestions. It seems that i have to built my own water leak detector system for sealed chamber.

Hi I need a small size (approx 50 mm by 100 mm) low noise 16-channel ADC card sending data on gigabit ethernet for real time data acquistion. Minimum sampling (simultaneous) requirement per channel is approx 48 Ksamp/s/ch. I know i ask for lot of things in very small size but if any one know...

Thanks for reply.I think you are right about use of glycerine but my concern is somehow different. I have studied different already developed ROVs/UUVs and in all these types of vessels, manufacturer have provide provision for water leak alarm system but unfortunately did not mention the details...

We are designing a small underwater ROV. This ROV conatains a sealed compartment in which electronic modules will be placed. We need some humidity or water ingress sensors to detect any water leakage in sealed compartment. Can any one kindly suggest such sensors which are typical for use in...

Thanks for suggestion Gunnar Englund. I also require zero phase distortion at the output of power amplifiers so that beamforming(depending strongly on phase) can be performed. Do these commercially available audio amplifiers(for music etc) satisfy zero phase distortion requirement? Also will...

Audio frequency range is from 1k to 10 KHz and resonant frequency of transducer is near 3.3 K Hz

I need power amplifiers for acoustic transducers having input impedance of 150 ohm at resonant frequency. These power amplifiers should operate in audio freq range and must be capable of delivering 400-500 W output power to these transducers(i.e. to 150 ohm load) . Does any one have idea from...

Thanks for reply GregLocock . I took a random simulated channel out of 32 channels (which are in time dmain) and took FFT of this channel. I search a complex number representing 20 KHz and multiply this complex number with its conjugate and i got power Pref (of 20KHz tone). Then after...

Thanks for your help Higgler.Actually i am working on the receive microphone array and all 32 channels are half wavelength (corresponding to 20 KHz frequency) apart. Secondly i could not understand input power term since i am only listening not transmitting. perhaps i could not clearly explain...

Hi I am working on conventional frequency domain beamforming for linear microphone receive array. I have simulated 32 channels array data with a poin target at 45 deg emiiting 20KHz tonal. I performed beamforming to make 32 beam time series data. To calculate array gain (or beamformer gain) I...