Duane, I use high tones on my 756PRO and can use 350 BW TPF, 350 BW
flat-top, or any other BW in the RTTY mode. If you are not using high tones
with one of the special RTTY filters (the pushbutton along the left side of
the display) you also cannot get RTTY decoding on the PRO screen. It all
works for me AOK. Maybe you are using AFSK and one of the SSB modes??
The TPF (twin peak filters, I assume) is pretty nice. I use the TPF for
almost everything RTTY.
Jerry W4UK
At 06:39 AM 2/16/2002 -0500, Duane Budd wrote:
>"RTTY signal is not centered in the pass band. Both rigs
>are using a
>filter width of 350 Hz - the PROII set with DSP and the 706
>using an
>FL-232."
>
>If I understand correctly what you are saying, you are using
>HIGH TONES and a filter width in the PRO of 350 Hz. You do
>not say what the I.F. SHIFT is. I have not been able to set
>a pass band width lower than about 750 Hz, keeping the
>signal within the pass band with the PRO using high tones.
>For that reason, I use LOW TONES. How do you do that?
>
>
>Duane Budd
>w5ben@arrl.net
>Johnson City, TN
>
>
>
>-----Original Message-----
>From: rtty-admin@contesting.com
>[mailto:rtty-admin@contesting.com]On
>Behalf Of WA9ALS - John
>Sent: Friday, February 15, 2002 5:39 PM
>To: Writelog@contesting.com; rtty@contesting.com
>Subject: [RTTY] MMTTY x 2
>
>
>Last night I thought I had MMTTY going in 2 instances using
>the
>computer's integrated sound and a Soundblaster card.
>However, the audio
>on one rig appeared to be out of the passband. I've
>experimented some
>more now with MMTTYx2. To show this graphically, I've made
>the
>following screenshots:
>
>http://wa9als.mystarband.net/rig1.gif
>http://wa9als.mystarband.net/rig2.gif
>Sorry for the large screenshots, but I have 2 monitors and I
>wanted all
>the settings to be readdable. BPF is not set in one
>instance of MMTTY,
>but that's not the problem.
>
>If you look at the first one above, rig1, you see the PROII
>transmitting
>and the 706 receiving on the same frequency. However, you
>see that the
>RTTY signal is not centered in the passband. Both rigs are
>using a
>filter width of 350 Hz - the PROII set with DSP and the 706
>using an
>FL-232.
>
>Conversely, the second shot above, rig2, shows the 706
>transmitting, and
>the received signal in the PROII's spectrum (on the left) is
>more like
>it should be.
>
>Several have suggested that MMTTY was not set for 2125 and
>170, but
>that's not the problem. Neither is it a problem with the
>settings on
>the 706. By mixing and matching this afternoon, I've
>determined that
>the problem only is apparent if the audio is passing through
>the
>computer's INTEGRATED SOUND system. (I have integrated
>sound for one
>"soundcard" and a Soundblaster Live Value card as the
>other.)
>
>If I put the PROII's audio through the INTEGRATED SOUND
>instead of the
>Soundblaster, I have the same problem. Thus it's something
>about the
>integrated sound system that's throwing the audio out of
>where MMTTY is
>looking. WHAT WOULD DO THAT?? I can't find any settings of
>the
>integrated sound that have any apparent pertinence or
>effect. I could
>get another Soundblaster card, but it seems like the
>integrated sound
>should work OK (AC'97 codec). Any ideas about this weird
>freq shift
>only seen when using the integrated sound?
>
>THANKS!
>
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