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Sampling of the signal in "Analog communication".

Q no1) A signal of frequency 4 Kz is sampled at the rateof 3500Hz .What will be the effect on the signal and signal frequency ?

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Please show the solution with the help of "MATHEMATICAL CALCULATION" and "RAY DIAGRAM" using sine wave.

Posted on Feb 22, 2008

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The signal and signal frequency remain unchanged. In this context, these terms refer to the incoming, and not resultant, aspects of the system.

However, because the Nyquist frequency (1.75kHz, or half the sampling rate) is not greater than the signal bandwidth (4kHz), aliasing will be introduced into any reconstructed signal that is based on these samples. Not enough data about the signal has been captured to be able to recreate it in its original form.

If the signal is very simple (a sine wave, for instance), the "apparent frequency" of the result can be calculated without too much trouble. A more complex signal (i.e. a voice signal with a bandwidth of 4kHz) presents more analysis problems.

I suggest you read your textbook for further information.

Posted on Feb 14, 2008

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1 Answer

Pcm 48 khz


mine does the same thing. I found a pdf of the manual and it said this in the troubleshooting section:
""PCM--kHz" appears on the display. , The sampling frequency is more than 48 kHz. Change the DVD setting to 48 kHz."
I have my seiki tv hooked into the dvd/ld input through a coaxial cable, and I don't think my tv has a setting to change the sampling frequency. so I have no idea what to do. any help would be great!

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What is a common sampling frequency for digital audio?


44.1 KHz is very common, otherwise known as 44,100 Hz, meaning it is sampling the audio 44,100 times per second

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Roland spd 20 analog test error+reason


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1 Answer

Can u hook it to a computer for sound


In general, your PC's sound card (and its controlling software) will determine what it can connect to.

Even the most basic PC would have stereo analog output via the typical green 1/8" connector or a headphone jack that easily adapts to RCA pair for REAL audio connection. Any Line Level input EXCEPT PHONO would accept the PC's output. The output level would be controlled by the sound card software and settings.

More-advanced sound cards would have similar adaptable 5.1 or 7.1 (paired) analog outputs and / or digital audio outputs that conform to the s/pdif or Dolby Digital standards.

A digital-capable receiver would accept 44.1 kHz for normal CD or DTS sources. Some diddling with the output sampling frequency might allow digital multichannel audio to be decoded by the receiver.

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1 Answer

How do I connect my computer to my Sony STR-D915.What if any special cable,adapters,equipment do I need to have all computer sound relayed through the speakers I have ?thanks


In general, your PC's sound card (and its controlling software) will determine what it can connect to.

Even the most basic PC would have stereo analog output via the typical green 1/8" connector or a headphone jack that easily adapts (*) to RCA pair for REAL audio connection. Any Line Level input EXCEPT PHONO would accept the PC's output. The output level would be controlled by the sound card software and settings.

* http://www.monoprice.com/products/product.asp?c_id=102&cp_id=10218&cs_id=1021804&p_id=665&seq=1&format=2

More-advanced sound cards would have similar adaptable 5.1 or 7.1 (paired) analog outputs and / or digital audio outputs that conform to the s/pdif or Dolby Digital standards.

A digital-capable receiver would accept 44.1 kHz for normal CD or DTS sources. Some diddling with the output sampling frequency might allow digital multichannel audio to be decoded by the receiver.

YOUR receiver has only analog stereo RCA inputs so you

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1 Answer

When I turn on my Home Theater Sony Model hcd-hdx576wf this message appears, "protector, push power". what I can do?


Follow the steps below to troubleshoot if the word PROTECT or PROTECTOR is flashing on the A/V receivers display.
1. Check the speaker wires and speakers for proper connections.
2. Reduce the volume level. IMPORTANT: If the receiver is played back at maximum volume level it may enter the protect mode. Maximum volume listening will cause the receiver to run very hot and may drain the output capacitors.
3. Disable the surround sound option if both the A and B speakers are being used simultaneously.
4. Ensure the top of the receiver has proper ventilation to keep it from overheating.
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1 Answer

Bouth it used need disc to make it easier to download music with direct connect


Metro PCS just as Sprint PCS does not use the same GSM network as AT&T or Verizon Wireless.

PCS is a completely separate wireless system. The phone MUST be compatible with the PCS communication platform to work properly, in other words it must be able to connect at the proper frequency bandwidth that PCS connects to. GSM uses the 900Mhz frequency range and PCS uses the newer 1.9Ghz.

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I have a similar model Sony phone the W600i and have yet to have a problem with it (2.75 years old). The memory storage is only 256MB, however with reducing the music sampling rate to 64kb from 192kb it allows me to store around 8 hours of music, enough to fly to Europe or South America. The camera has a lot of features found in regular digital cameras like:

White balance
Appeture setting
Date Stamp
Sepia Tone
B/W image
Panoramic Image (Great feature)

Hope this helps you out.

Keith

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1 Answer

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