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to downlink frequency. However, some modern satellites use on-board processing, where the signal is demodulated, decoded, re-encoded and modulated aboard the satellite. This type, called a "regenerative" transponder, is more complex, but has many advantages, such as improving the signal to noise
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is derived from the received signal. The frequency linkage allows an interrogating ground station to recover the
Doppler shift and thus infer range and speed from a communication signal without allocating power to a separate ranging signal.
298:) is a normalized way to refer to transponder bandwidth. It simply means how many transponders would be used if the same total bandwidths used only 36 MHz transponders. So, for example, the
258:(SCPC) mode, with multiple carriers (analog or digital) per transponder. This allows each station to transmit directly to the satellite, rather than paying for a whole transponder or using
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transponders: 12 with a bandwidth of 36 MHz, 8 with 54 MHz, and 4 with 72 MHz, which totals to 1152 MHz, or 32 TPE (i.e., 1152 MHz divided by 36 MHz).
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ratio as the signal is regenerated from the digital domain, and also permits selective processing of the data in the digital domain.
151:(LNA), designed to amplify the signals received from the Earth station (normally very weak, because of the large distances involved),
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between the receiving and the transmitting antennas. It is mainly used in satellite communication to transfer the received signals.
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371:"Commercial Geostationary Satellite Transponder Markets for Latin America"
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Device or series of devices that receive, then transmit (relay) a signal
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stations in orbit and carry dozens of transponders, each with a
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channels may travel through a single transponder on a single
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of tens of megahertz. Most transponders operate on a
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330:(3rd ed.). New York: McGraw Hill. p. 587.
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373:. Frost & Sullivan Research Service. 2003-07-03
49:. Unsourced material may be challenged and removed.
129:is the series of interconnected units that form a
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438:"ARSAT-1 Telecommunication Satellite, Argentina"
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154:a frequency translator (normally composed of an
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242:only had one channel per transponder, with
58:"Transponder" satellite communications
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939:List of communication satellite companies
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109:Learn how and when to remove this message
140:an input band-limiting device (an input
136:A transponder is typically composed of:
934:List of communications satellite firsts
391:Jacbo Gullish, Futron (February 2011).
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816:Shanghai Spacecom Satellite Technology
458:Belluscio, Alejandro G. (2014-10-06).
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47:adding citations to reliable sources
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180:Most communication satellites are
172:a power amplifier (this can be a
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176:or a solid-state amplifier).
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507:Satellite communications
328:Satellite Communications
123:communications satellite
855:Satellite manufacturers
997:Satellite broadcasting
440:. Aerospace Technology
326:Roddi, Dennis (2001).
292:transponder equivalent
286:Transponder equivalent
131:communications channel
270:with other stations.
521:Satellite television
419:. JSat International
43:improve this article
906:Trade organizations
897:Thales Alenia Space
710:Astra Digital Radio
703:Broadcast companies
632:Satellite data unit
396:www.satmagazine.com
254:can also travel in
174:traveling-wave tube
149:low-noise amplifier
725:Sirius XM Holdings
616:Parabolic antennas
462:. NASA SpaceFlight
356:2016-03-05 at the
250:. Non-multiplexed
1002:Radio electronics
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279:carrier frequency
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398:. SatMagazine
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99:December 2011
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60: –
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54:Find sources:
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44:
38:
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32:This article
30:
26:
21:
20:
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796:Intersputnik
720:Dish Network
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464:. Retrieved
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442:. Retrieved
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421:. Retrieved
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400:. Retrieved
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375:. Retrieved
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302:has 24 IEEE
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268:multiplexing
240:analog video
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220:(including
214:multiplexing
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41:Please help
36:verification
33:
806:SED Systems
740:1worldspace
556:Transponder
275:transceiver
244:subcarriers
182:radio relay
127:transponder
986:Categories
771:Globalstar
466:2015-08-25
444:2015-08-31
423:2015-08-31
402:2015-08-31
377:2015-08-31
314:References
216:, several
165:an output
156:oscillator
69:newspapers
577:SAT>IP
260:landlines
238:Original
192:bent pipe
186:bandwidth
147:an input
958:Category
826:Starlink
821:Star One
791:Intelsat
786:Inmarsat
776:Hispasat
766:Eutelsat
761:EchoStar
637:Spacebus
570:Hardware
354:Archived
230:wideband
970:Commons
841:Turksat
831:Telesat
801:Iridium
735:Allente
715:DirecTV
689:ISDB-S3
684:DVB-S2X
674:DVB-RCS
300:ARSAT-1
233:carrier
196:(i.e.,
83:scholar
887:SpaceX
867:Boeing
862:Airbus
846:Viasat
836:Tooway
781:Hughes
730:Sky UK
679:DVB-S2
664:DVB-SH
587:DiSEqC
334:
224:) and
202:uplink
198:u-bend
158:and a
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64:
56:
927:Lists
872:INVAP
669:S-DMB
592:USALS
226:audio
218:video
208:With
90:JSTOR
76:books
332:ISBN
308:band
266:for
248:ATIS
212:and
62:news
892:SSL
811:SES
296:TPE
125:'s
45:by
988::
656:TV
654:/
290:A
235:.
144:),
121:A
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614:(
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306:u
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294:(
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106:(
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97:(
87:·
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66:·
39:.
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