[Elecraft] DATA A Reverse? AFSK A Reverse etc?

[Lynn W. Taylor, WB6UUT]

Remember, LSMFT

Low-space means fine teletype.

See you on the green keys....

-- Lynn

On 4/8/2013 3:40 PM, Richard Ferch wrote:
> The K3, like every other amateur transceiver I know of, uses LSB for its
> RTTY-specific data modes (AFSK A and FSK D). This is the standard
> amateur convention for RTTY. Note that RTTY outside the amateur bands
> may be different; the choice of polarity for RTTY is an arbitrary
> convention which is not the same in all services. Regardless of which
> sideband the transceiver uses, if you are using software to decode and
> encode signals the software usually provides a way to choose either
> polarity.
>
> The MMTTY software assumes the radio is in LSB. You can use MMTTY for
> amateur RTTY with the radio in USB (FSK D-REV or AFSK A-REV), but to do
> so you need to press the "Rev" button in MMTTY. Some multi-mode
> digital-mode software assumes the radio is in USB for all data modes
> including RTTY; there is usually a Reverse option in such software that
> you can use so the software will work with the radio in LSB.
>
> As for CW, you can use whichever sideband you prefer (e.g. depending on
> whether you are tuning up the band or down the band, or on the presence
> of nearby signals either above or below the desired signal's frequency).
> The stations you are contacting cannot tell the difference. Be that as
> it may, the K3 uses LSB for CW; CW-REV in the K3 is USB.
>
> 73,
> Rich VE3KI
>
>
> K3KO wrote:
>
>> Keep in mind what's "normal" depends upon where you are.  My
>> recollection is that MTTY used to transmit on USB as non-inverted.   I
>> think USB RTTY is standard elsewhere too.
>
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