Odg: Što mi se dogodilo???
Reply #16 –
Glede hopinga kod Spektruma:
Wikipedia:
"Frequency-hopping spread spectrum [glow=red,2,300](FHSS)[/glow] is a method of transmitting radio signals by rapidly switching a carrier among many frequency channels, using a pseudorandom sequence known to both transmitter and receiver. It is utilized as a multiple access method in the frequency-hopping code division multiple access (FH-CDMA) scheme."(Futaba Fasst, MPX M-Link, Weatronic 2.4GHz, XPS V3, Hitec AFHSSS ...)
"In telecommunications, direct-sequence spread spectrum [glow=red,2,300](DSSS)[/glow] is a modulation technique. As with other spread spectrum technologies, the transmitted signal takes up more bandwidth than the information signal that is being modulated. The name 'spread spectrum' comes from the fact that the carrier signals occur over the full bandwidth (spectrum) of a device's transmitting frequency." (Spektrum, Corona V2, Assan, JR 2.4GHz, XPS V1 ...)
Kužite ne?
Ja ne baš sasvim ...
FHSSS stalno skače po "pseudorandom" izabranim frekvencijama ...
DSSSS koristi jednu frekvenciju ali širu i koristi "Pseudorandom" bijeli šum za prošrenje bandwitha ... To ne znači da ne skače na drugu frekvenciju u slučaju potrebe. Poznati problem kod XPS-a V1 se zvao "to hop or not to hop" i u nekim je slučajevima dovodio do prekida komunikacije i odlaska u safe mod. Znam da Assan koristi istovremeno dvije frekvencije, a Corona tri. Nikad nisam na testu imao Spektruma pa ne mogu reći koliko frekvencija on koristi.
Pozdrav
Outrage Fusion 50
Futaba T14SG