Signal forms and frequencies

Message boards : SETI@home Science : Signal forms and frequencies

Author	Message
abis Send message Joined: 6 Jan 11 Posts: 1 Credit: 37,881 RAC: 24	Message 1065057 - Posted: 9 Jan 2011, 21:34:46 UTC
	As a telecommunications engineer I'm interested in signal forms and frequencies that are being scanned by the SETI@home team. These may be silly questions, but I'm new to this, so bear with me ;-). 1) What kind of signal forms is SETI@home searching for? By signal form I mean for example AM, FM, TDMA, CDMA, QAM, OFDM? 2) Why is the frequency range limited to only 1418.75 - 1421.25 MHz?
	ID: 1065057 ·

Gary Charpentier Volunteer tester Send message Joined: 25 Dec 00 Posts: 10313 Credit: 5,073,947 RAC: 5,971	Message 1065148 - Posted: 10 Jan 2011, 2:15:14 UTC - in response to Message 1065057.
	As a telecommunications engineer I'm interested in signal forms and frequencies that are being scanned by the SETI@home team. These may be silly questions, but I'm new to this, so bear with me ;-). 1) What kind of signal forms is SETI@home searching for? By signal form I mean for example AM, FM, TDMA, CDMA, QAM, OFDM? 2) Why is the frequency range limited to only 1418.75 - 1421.25 MHz? Multibeam is looking for a CW type signal, which may be pulsed. The frequency chosen is near the hydroxyl resonant frequency. There is another project -- not Seti@Home -- Serendip that also checks the same data on a much larger bandwidth but not as sensitively. Astropulse is looking for pulsed broadband signals, essentially what a pulsar puts out, which at our distance is about what a RADAR would look like. ____________
	ID: 1065148 ·

Gary Charpentier Volunteer tester Send message Joined: 25 Dec 00 Posts: 10313 Credit: 5,073,947 RAC: 5,971	Message 1065179 - Posted: 10 Jan 2011, 4:57:26 UTC - in response to Message 1065163.
	And CW stands for? Any or all of the first three Technology entries: http://en.wikipedia.org/wiki/CW ____________
	ID: 1065179 ·

Message boards : SETI@home Science : Signal forms and frequencies