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Uplink and downlink are frequencies

Communication from earth station to satellite in uplink and communication from satellite to earth station is downlink

Always uplink freq.>downlink freq.

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uplink frequency-1710-1785MHz

downlink frequency-1805-1880

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Uplink --> 890 MHz - 915 MHz

Downlink --> 935 MHz - 960 MHz

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Uplink is from MS to BS

Downlink is from BS to MS

P.S: BS=Base Station, MS=Mobile Station e.g cell phone

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Uplink frequency is a frequency that goes from the ground to the satellite. Downlink frequency goes from the satellite to the ground.

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  • Worldwide downlink for voice - 145.80
  • Worldwide packet uplink/downlink - 145.825
  • Region 1 voice uplink - 145.20
  • Region 2 and 3 voice uplink - 144.49
  • Worldwide uplink for cross band voice repeater - 437.80
  • Worldwide SSTV downlink - 145.800

For more information, visit the NASA ISS Amateur Radio page at http://spaceflight.nasa.gov/station/reference/radio/

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The downlink is greater than the uplink on most internet connects due to overall demand for bandwidth. Downloading takes up a majority of internet usage and connections are optimized for it.

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Hi, For every GSM band there are Uplink and downlink frequencies. Example: GSM 900 TX: 880 MHz to 915 MHz is an uplink frequency range GSM 900 RX: 925 MHz to 960 MHz is a downlink frequency range Aloha, Maverick

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Duplex distance/spacing is the distance between the uplink and downlink frequencies

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downlink becouse frequncy / power low compare to uplink

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Most two-way radios are 'duplex' transceivers. This means they transmit (uplink)on one frequency and receive (downlink) on another- spaced at least 13 MHz apart. This stops interference between the radio's components.

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In the CDMA technology It is either between your Handset and the Mobile Station. The dedicated frequency are allocated for u sending your data to the mobile station (Uplink freuency) and a dedicated frequency is reserved for you to receive your data from the mobile station (Downlink frequency)

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It varies - according to which system is in use. The related link to Wikipedia lists the uplink & downlink frequencies.

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For communication satellites the range is much higher than that of communication relay. Communication Satellite can cover up to several thousands of kilometers.

For communication relay, the uplink and the downlink frequency is the same. But for communication satellites the uplink and the downlink frequencies are different in order to avoid interference.

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Uplink translates also to Upload - where you send data to another destination. Like when you want your data to be acessed by any other person you upload that thing and data rate of uploading is called as uploading speed.

Downlink translates to Download - where you receive data from another destination. meant that when you want to acess any data from any source and data transfer rate from downlink is also known as downloading speed

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So that they can both be used at the same time (i.e. full duplex) without interference.

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due to path loss : higher is the frequency higher is the patrh loss

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Douglas J. Mudgway has written:

'Uplink-downlink' -- subject(s): Deep space network, History

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This is actually the EGSM uplink band. It carries signals "up" from the mobile station to the base station. EGSM downlink is from 925MHz to 960MHz and carries signals from the base station "down" to the mobile station.

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You would need to know the LO frequency from the satellite.

Ex- C-band is 2200Mhz

If you UL is 6.0GHz you DL would be 3.8GHz

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Tetra communication systems typically operate within the frequency range of 380-400 MHz for uplink and 390-410 MHz for downlink transmissions.

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As the frequency increase its penetration power decreases.The signal travels a lesser distance.Hence for a perticular area more no of towers need to be erected in 1800/1900 than in 900MHZ for full coverage...Hence vodafone( 1800MHZ) has more towers per unit area than Idea Cellular ( 1800+900) .....

Band of 900 is from 890-915( uplink) 935-960Mhz( downlink)....

Band of 1800 is from 1710-1785(uplink) and 1805-1880MHZ(Downlink)....

Same property is followed here.....The uplink is lower ( MOBILE -BTS) than the downlink frequency (BTS-MOBILE)...so that this may help the uplink signal to travel futher without consuming much power...BTS due to its increased power ,has higher frequency to tavel the same distance....

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It is because a mobile is operated on a battery with low power and therefore it sends signals on low(uplink) frequencies whereas a base station is driven by high power and can easily send signals on high(downlink) frequencies. This can be verified by Friis equation which says Transmitted power and Transmitted frequency are directly proportional.

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It is an electronic device on board a geostat satellite to receive uplink data and picture bits,amplifying it before converting it to a downlink freqency bit stream and sending it down to earth.

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routers basicaly has 2 ports, one is uplink and 1 is downlink, is any1 is not assigned , anyone can be assisgned for connecting to the switch

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A:

Uplink translates also to Upload - where you send data to another destination. Like when you want your data to be acessed by any other person you upload that thing and data rate of uploading is called as uploading speed.

Downlink translates to Download - where you receive data from another destination. meant that when you want to acess any data from any source and data transfer rate from downlink is also known as downloading speed.

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GSM 900:

Uplink frequency: 890 - 915 MHz

GSM 1800 :

Uplink frequency: 1710 - 1785 MHz

GSM 1900:

Uplink frequency: 1850 - 1910 MHz

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Uplink translates also to Upload - where you send data to another destination.

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In the sense of a mobile communication:

Downlink frequency is that used by a base station to communicate with the Mobile.

In satellite communication also the same theory exists

downlink is the return path.

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Which is better is a matter of opinion, because both work together to achieve a functioning system. HSPA stands for High Speed Packet Access, while HSDPA is High Speed Downlink Packet Access and HSUPA is High Speed Uplink Packet Access. One is essentially "download", and the other is "upload".

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An Uplink Port is a port on a connectivity device, such as a hub or switch, used to connect it to another connectivity device.

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That's going to depend on the particular ground-station equipment for the uplink,

and the transponder power for the downlink. If you don't know these, then you

need to get them before you can begin the analysis of the satellite link budget,

and if you don't understand that they can be different for every link, then you

really ought to trust the analysis to another engineer.

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The uplink is a crossover port which allows a connection to another hub, thus extending the number of clients you can connect on the network.

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The uplink frequency is higher than the downlink frequency in satellite communication because higher frequencies can carry more information and are less affected by interference and noise. This setup allows for efficient communication between ground stations and satellites, ensuring a reliable transmission of data.

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Various sites online offer Downlink music and sounds for download, including mp3bear, the piratebay, junodownload, and iTunes. The prices vary, as do the legality of the sites, so customers need to take care to not pirate Downlink's music.

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UPlink in IS-95 (CDMA)

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Taken from:

https://support.steampowered.com/kb_article.php?ref=5386-HMJI-5162

128k uplink = 4 players (2 players for srcds)

256k uplink = 7 players (4 players for srcds)

320k uplink = 9 players (6 players for srcds)

512k uplink = 14 players (9 players for srcds)

768k uplink = 21 players (14 players for srcds)

1024k uplink = 28 player (19 players for srcds - note 16 players max for HL2DM)

1140k uplink = 32 players (max for HLDS) (21 players for CS:S)

1708k uplink = 32 players for CS:S (max)

A good rule for HLDS is 35.6Kbits per player.

A good rule for SRCDS (Source Games) is 53.4KBits per player.

(about 1.5x more than HLDM)

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In satellite communication uplink (transmission of signal from earth station to satellite ) & downlink (reception of signal from satellite to earth station) takes place TX & RX involves a finite amount of delay which is acceptable in data communication, but i audio & video TX this delay is unacceptable, overlapping/ alaising causes errors which demodulated by qpsk.

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To enable two-way conversations to take place simultaneously. If you use a single frequency, one person has to wait until the other has finished speaking before they can respond. With split frequencies, both people can speak and hear simultaneously - without waiting for the other to stop speaking. It's technical term is 'split frequency duplex'.

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High Speed Downlink Packet Access

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repair modulator encoder dishes

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If you connecting a hub to another device then the cable must be placed in the uplink port, or a port that can switch between a client port and an uplink port.

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High Speed Uplink Packet Access

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A player can get Uplink in BO2 or Call of Duty Black Ops 2 by downloading the Vengeance downloadable content pack. This unlocks the Summit map where players can experience a whole new level of gameplay.

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