Alan Freedman -- The Computer Language Company - Computer Desktop Encyclopedia
Computer Desktop Encyclopedia
Longest-Running Tech Reference on the Planet

A CDE Definition

You'll love The Computer Desktop Encyclopedia (CDE) for Tech Term of the Day (TTOD)

LOOK UP ANOTHER TERM


optical bands

The spectrum for transmission in singlemode optical fibers has been broken into the following wavelength ranges, or bands. Typically, the wavelengths transmitted in multimode fibers are around 850 and 1310 nm, known originally as first window and second window. See satellite bands.


                    Wavelength Range
 Band    Name       In Nanometers (nm)

 O-band  Original      1260 - 1360

 E-band  Extended      1360 - 1460

 S-band  Short         1460 - 1530

 C-band  Conventional  1530 - 1565

 L-band  Long          1565 - 1625

 U-band  Ultra-long    1625 - 1675





satellite bands

Following are the frequency ranges used in satellite communications. See also optical bands.


 L-band (390 MHz-1.55 GHz)
 GPS satellites, satellite phones,
  misc commsats,
  SETI outer space exploration

 S-band (1.55-5.2 GHz)
 weather satellites, XM/Sirius radio

 C-band (3-7 GHz) (first satellite band)
 misc GEO commsats, cable TV,
  satellite TV (7-10 ft. steerable dishes)

 X-band (8-12 GHz)
 misc commsats

 Ku-band (11-15 GHz)
 TV network satellite distribution, misc
  commsats, satellite TV (18" dishes)

 Ka-band (18-40 GHz)
 misc commsats, satellite phone backhaul





Personal Use Only

Before/After Your Search Term
BeforeAfter
OPSECoptical channel
Opswareoptical character recognition
opt-inoptical computer
opt-in emailoptical cross-connect
opt-outoptical disc
Optaneoptical disc library
Opteronoptical disk
Opti-Jackoptical disk library
optical amplifieroptical drive
optical audiooptical fiber

Terms By Topic
Click any of the following categories for a list of fundamental terms.
Computer Words You Gotta KnowSystem design
Job categoriesUnix/Linux
Interesting stuffPersonal computers
InternetIndustrial Automation/Process Control
Communications & networkingAssociations/Standards organizations
HistoryDesktop publishing
Audio/VideoGraphics
MainframesSecurity
ProgrammingHealthcare IT
System design