[RTTY] RTTY] FSK vs AFSK

[Art Searle W2NRA]

Hi Bob,

MMVARI on does RTTY in AFSK.  FSK is not supported.

Excerpt from the EMMVARI.TXT file (note last line):

* RTTY implemented in MMVARI are:
	- 170Hz shift. It can be changed by macro command
	 <%TxShift...>, <%RxShift...>.
	- Carrier frequency is the center frequency
	- RTTY-L for LSB (default) and RTTY-U for USB (reverse)
	- 5-bit BAUDOT S-BELL only
	- UOS on the RX side is ON. It can be changed
	 by macro command <%UOS=ON/OFF/ONOFF>.
	- UOS on the TX side is always ON.
	- LTR diddle is always engaged. It can be changed
	 by macro command <%DIDDLE=BLK/LTR>.
	- AFSK only (no FSK support).

73 Art W2NRA


Date: Thu, 7 Sep 2006 21:21:38 -0500
From: "AD5VJ  Bob" <rtnmi at sbcglobal.net>
Subject: [RTTY] FSK vs AFSK
To: "'RTTY List'" <rtty at contesting.com>
Message-ID: <009601c6d2ed$83cdc2e0$6401a8c0 at D9FBHB71>
Content-Type: text/plain;	charset="us-ascii"

I am wanting to use FSK for my RTTY mode and of course AFSK for PSK, ect.

Can someone tell me since I have the system set up with MMVARI and MMTTY how
I can know for sure that when I switch over to MMTTY
that it is sending FSK vs AFSK like MMVARI does?

I think I am sending AFSK from MMVARI and FSK from MMTTY but am not sure.

I do know that:
 when sending with MMVARI and I adjust the MIC drive it makes a difference
on the ALC meter

 but when using MMTTY the MIC drive makes no difference on the AFC only
adjusting the output power makes a difference.

  73 fer nw,
Bob AD5VJ(AAR6VM)
http://www.ad5vj.com/

Member CTDXCC
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