Fw: (K3) RTTY offset ?

[Adriano Perazio]

----- Original Message -----
From: "Adriano" <[hidden email]>
To: "Richard Ferch" <[hidden email]>
Sent: Wednesday, January 26, 2011 9:53 AM
Subject: Re: [Elecraft] (K3) RTTY offset ?

> Hello Greg & Richard
>
> Sry i forgot mention:
> Software is MMVARI & MixW
> On the radio i´m using DATA A mode as described on a tutorial i read don´t
> know where.
>
> Tnx for the help
>
> PY2ADR
> ----- Original Message -----
> From: "Richard Ferch" <[hidden email]>
> To: <[hidden email]>
> Sent: Tuesday, January 25, 2011 9:48 PM
> Subject: Re: [Elecraft] (K3) RTTY offset ?
>
>
>> Hello Adriano,
>>
>> You didn't say whether you were using FSK D or AFSK A, or what software
>> you were using. I will assume that when you say "on the scope" you mean
>> on the waterfall in software such as MMTTY.
>>
>> If your radio is in FSK D, then it can receive on any frequency within
>> the filter bandpass, but it can only transmit on one frequency - the one
>> corresponding to the PITCH setting. If you click on a signal in the
>> waterfall to receive it, the frequency you choose in the software's
>> waterfall will probably not be the same as the one the radio will
>> transmit on. If you use the K3's MONitor function to listen to your
>> transmitted signal, you can hear whether the transmitted and received
>> frequencies are the same.
>>
>> Depending on the software you are using and its capabilities, there are
>> advanced methods to use mouse-tuning and AFC in FSK RTTY, but the
>> simplest solution to this problem is never to use clicking in the
>> waterfall to find a signal when you are using FSK. If you are CQing, you
>> can use AFC to let your receiving software tune in callers who come back
>> slightly off-frequency, but when you are planning to call someone else
>> who is CQing you should turn AFC off. In MMTTY, you can use the HAM
>> button to ensure that your receive frequency will be the same as your
>> transmit frequency. You should configure the HAM default to be the same
>> as the radio's PITCH setting.
>>
>> If your radio is in AFSK A, it can transmit on the same frequency it
>> receives on, although the best frequency for both transmitting and
>> receiving is the one in the PITCH setting and the HAM button. If you are
>> using MMTTY software the easiest way to ensure that your transmit and
>> receive frequencies are the same is to turn NET on. With NET on you can
>> safely use mouse-clicking to tune in a signal to work. However, if you
>> are calling CQ you should turn NET off, and use the HAM button before
>> your first transmission to establish your transmit frequency. If the
>> other station comes back off-frequency you can use AFC or a mouse-click
>> to copy the other station's signal, but as soon as the QSO is completed
>> you should click on the HAM button to return to your original transmit
>> frequency.
>>
>> 73,
>> Rich VE3KI
>>
>>
>> PY2ADR wrote:
>>
>>> Trying to config k3 on digi modes but i noted a "offset" between rx and
>>> tx ...
>>> When i find a sig on the scope i click on it and the rx is ok. Then i go
>>> tx and the \
>>> station comes back in another qrg. Or when i call cq the stations comes
>>> back in \
>>> another qrg....
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[Richard Ferch]

Adriano,

In MMVARI, make sure NET is selected (turned on). If NET is off, your
transmit and receive frequencies can be different. If you see two
different indicators at the top of the waterfall (one is light blue and
the other one is dark blue), that means your transmit and receive
frequencies are different. You can make them the same by clicking on NET.

In MixW, make sure LOCK is turned off. If LOCK is on, your transmit and
receive frequencies can be different.

If you are using DATA A, you will need to select rtty-U in MMVARI. To
tune in a signal, click in the waterfall midway between the two peaks in
the waterfall.

Note that in DATA A, the frequency on the radio dial is the suppressed
carrier (BFO) frequency. The actual frequency you are transmitting and
receiving on will be higher than the BFO frequency by the same amount as
the audio frequency of the left track in the waterfall. For example, if
the radio's dial is on 14080.00 and the left track of the signal is on
1500 Hz in the waterfall, the actual signal frequency is 14081.50 kHz.

73,
Rich VE3KI


PY2ADR wrote:

 > Sry i forgot mention:
 > Software is MMVARI & MixW
 > On the radio i´m using DATA A mode as described on a tutorial i read
don´t
 > know where.
______________________________________________________________
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Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html