From: Dave
Sent: Monday, April 27, 2020 23:08
To: [email protected]
Subject: Re: [VARA-MODEM] FT-2000
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Have you tried using just Upper Sideband mode with the widest filters?
I'm not familiar with the FT-2000 but I suspect that it is set for a
narrower mode digital signal, like packet or RTTY. Older rigs do that in
DATA (pre software modem era) modes. You want at least 2.5-2.7 kHz for
Winmor and ARDOP in their wide bandwidth modes and as close to 3 kHz as
your rig will give you for VARA. Is your rig control software shifting
the filters when you change modes? Lots of variables. (How does the rig
know you're use VARA?) It's also helpful to shut off all of the RX dsp
features and let the modem software do the filtering. Some software
modems will set the "channel busy" flag because they can't determine
signal to noise status due to a lack of noise when you have the RX dsp
noise filter activated.
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73 - Dave - W7EES
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On 4/27/20 10:53 AM, GARY SWARTOUT wrote:
> My FT-2000 appears to shift the passband when using VARA.? In the Yaesu
> DATA mode the waterfall signal is about 25% of the normal width and
> crowded on the left side.? It works just fine in the WSJT modes.? Why
> not in VARA or ARDOP?
>
> ?
>
> Gary K7GS
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> Sent from Mail <https://go.microsoft.com/fwlink/?LinkId=550986> for
> Windows 10
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> ?
>
>
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- Dave - W7EES -
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