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What is difference between baseband and broadband transmission?

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Asked By: Anonymous |

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In a baseband transmission, the entire bandwidth of the cable is consumed by a single signal. In broadband transmission, signals are sent on multiple frequencies, allowing multiple signals to be sent simultaneously.

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Baseband Signalling:

1)Uses digital signalling

2)No frequency-division multiplexing

3)Bi-directional transmission

4)Signal travels over short distances

Broadband Signalling:

1)Uses analog signalling

2)Unidirectional transmission

3)Frequency-division multiplexing is possible

4)Signal can travel over long distances before being attenuated

Create Date

Monday, April 28, 2008

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networking

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Network Administrator

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235

In what way the protection fault handler concludes?

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Asked By: silme |

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After finishing the execution of the fault handler, it sets the modify and protection bits and clears the copy on write bit. It recalculates the process-priority and checks for signals.

Create Date

Tuesday, May 13, 2008

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Operating System

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Software Engineer

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267

What is AMPS?

Electronic Communications Engineer

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Asked By: Anonymous |

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Advanced Mobile Phone Service (AMPS) is a first-generation analog, circuit-switched cellular phone network. Originally operating in the 800 MHz band, service was later expanded to include transmissions in the 1900 MHz band, the VHF range in which most wireless carriers operate. Because AMPS uses analog signals, it cannot transmit digital signals and cannot transport data packets without assistance from newer technologies such as TDMA and CDMA.

Create Date

Monday, May 12, 2008

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J2ME

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239

Bluetooth signals do not interfere with our PCs or cordless phones or portables. Why?

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Asked By: thunderd |

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Bluetooth uses low-power signals, it plays around in 2.45 GHz range, while most of consumer devices would be using 900 MHz.

Create Date

Sunday, May 11, 2008

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Apache

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web master

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215

What is bandwidth ?

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Asked By: deus_x |

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The difference between the highest and lowest frequencies available for network signals. The term is also used to describe the rated throughput capacity of a given network medium or protocol.

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Saturday, May 10, 2008

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What is asynchronous transmission ?

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Asked By: canoz |

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Term describing digital signals that are transmitted without precise clocking. Such signals generally have different frequencies and phase relationships. Asynchronous transmissions usually encapsulate individual characters in control bits (called start and stop bits) that designate the beginning and end of each character. Compare with isochronous transmission, plesiochronous transmission, and synchronous transmission.

Create Date

Saturday, May 10, 2008

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CCNA, Transmission

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271

What is applique ?

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Asked By: canoz |

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Mounting plate, used primarily in the Cisco AGS+, MGS, and CGS chassis, containing connector hardware allowing attachment to the network. Appliques translate communication signals from a network interface into the signals expected by the communication standard being used (such as EIA/TIA-232 or V.35).

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Saturday, May 10, 2008

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234

What is a-law ?

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Asked By: skywalker830 |

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The ITU-T companding standard used in the conversion between analog and digital signals in PCM systems. A-law is used primarily in European telephone networks and is similar to the North American mu-law standard.

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Saturday, May 10, 2008

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251

What is ADPCM ?

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Asked By: skywalker830 |

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Adaptive Differential Pulse Code Modulation. Process by which analog voice samples are encoded into high-quality digital signals.

Create Date

Saturday, May 10, 2008

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283

Have you studied buses? What types?