Home |
Search |
Today's Posts |
|
#1
![]() |
|||
|
|||
![]()
is it cw i guess new to radio
|
#2
![]() |
|||
|
|||
![]()
Could you rephrase your question so it's understandable? Perhaps use a verb,
some standard sentence syntax, and some punctuation?? Joe W3JDR wrote in message ... is it cw i guess new to radio |
#3
![]() |
|||
|
|||
![]()
"W3JDR" wrote in message
news ![]() Could you rephrase your question so it's understandable? Perhaps use a verb, some standard sentence syntax, and some punctuation?? Joe W3JDR wrote in message ... is it cw i guess new to radio Looks like W3JDR may be new to radio too, to have not known what FSK meant. No further clarification was needed. cl |
#4
![]() |
|||
|
|||
![]()
always a mother goose in a newsgroup see w3jdr good buddy.
|
#5
![]() |
|||
|
|||
![]()
Welcome aboard rraa.
" fsk " may still stand for " frequency-shift keying ", a form of frequency modulation where one frequency is a " mark " and another is a " space ". Combinations of marks and spaces make characters ... -- 73, Dave, N3HE Cincinnati OH wrote in message ... is it cw i guess new to radio |
#6
![]() |
|||
|
|||
![]()
frequency-shift keying (FSK): A modulating scheme in which the modulating
signal shifts the output frequency between predetermined values. Usually, the instantaneous frequency is shifted between two discrete values termed the "mark" and "space" frequencies. Used to transmit digital data, i.e. two different carrier frequencies are used to represent zero and one. FSK was originally used to transmit teleprinter messages by radio (RTTY) but can be used for most other types of radio and land-line digital telegraphy Although this a form of frequency modulation (FM), FM is usually thought of as a voice signal that modulates the carrier. -- CL -- I doubt, therefore I might be ! wrote in message ... is it cw i guess new to radio |
#7
![]() |
|||
|
|||
![]()
Caveat Lector described accurately and succinctly "FSK". For more
information, do a web search on RFL Electronics, and on Quindar Tones Best regards, Richard Harrison, KB5WZI |
#8
![]() |
|||
|
|||
![]()
No, FSK is not CW. Although others have provided a technical definition of
FSK (Frequency Shift Keying), from a practical standpoint FSK is one of two methods that hams use to transmit in RTTY mode. Unlike CW, where characters are constructed by sending combinations of short (dot) and long (dash) signals all on one transmit frequency, RTTY characters are sent by shifting your transmit frequency back and forth between a higher (mark) and lower (space) frequency. In most ham circumstances, those two frequencies are 170 cycles apart. Hams use two popular techniques to create those 170-hertz shifted frequencies: - FSK, in which the VFO of the transmitter "knows" to shift its frequency hi/lo in response to an input signal on the rear panel. FSK mode functions when the transceiver is in RTTY mode. - AFSK, in which a computer, using software that controls its sound card, generates the correct tones and those tones are fed into the microphone input of the transceiver. AFSK mode functions when the transceiver is in SSB mode -- -larry K8UT wrote in message ... is it cw i guess new to radio e |
#9
![]() |
|||
|
|||
![]()
FSK=Frequency Shift Keying
Larry Gauthier (K8UT) wrote: No, FSK is not CW. Although others have provided a technical definition of FSK (Frequency Shift Keying), from a practical standpoint FSK is one of two methods that hams use to transmit in RTTY mode. Unlike CW, where characters are constructed by sending combinations of short (dot) and long (dash) signals all on one transmit frequency, RTTY characters are sent by shifting your transmit frequency back and forth between a higher (mark) and lower (space) frequency. In most ham circumstances, those two frequencies are 170 cycles apart. Hams use two popular techniques to create those 170-hertz shifted frequencies: - FSK, in which the VFO of the transmitter "knows" to shift its frequency hi/lo in response to an input signal on the rear panel. FSK mode functions when the transceiver is in RTTY mode. - AFSK, in which a computer, using software that controls its sound card, generates the correct tones and those tones are fed into the microphone input of the transceiver. AFSK mode functions when the transceiver is in SSB mode |
#10
![]() |
|||
|
|||
![]() - AFSK, in which a computer, using software that controls its sound card, generates the correct tones and those tones are fed into the microphone input of the transceiver. AFSK mode functions when the transceiver is in SSB mode -- -larry K8UT Larry you were doing good to you got to AFSK. When pure sine waves are fed into a SSB transciever audio, the output of the transmitter is the same as FSK. This is what is suspose to hapen when using the sound card. AFSK is generated if the transmitter is in the AM or FM mode. This is used mainly on VHF and above on FM to use the digital modes such as rtty. |
Reply |
|
Thread Tools | Search this Thread |
Display Modes | |
|
|
![]() |
||||
Thread | Forum | |||
BETTER HF FREQUENCY PLAN for AMATEUR RADIO | Policy | |||
Mode for Best Throughput? | Digital | |||
Icom T2H ANI Mode | Equipment | |||
Icom T2H ANI Mode | Equipment | |||
CCIR Coefficients METHOD 6 REC533 // AUCKLAND --> SEATTLE | Shortwave |