[RTTY] IC-7100 followup

[Joe Subich, W4TV]

 > Anyone have any suggestions as to how to improve the copy while using
 > the ICOM CODEX audio?

Spend some time with the Instruction Manual(s) for your rig:

1) Adjust the audio output using Set Mode -> Connectors -> ACC/USB AF
    Level so you are not overdriving the CODEC.  You should probably
    set the Windows Input level to 50-80% and adjust the ACC/USB level
    for just under "Red" on the "meter" in the Windows Sound Control
    Panel.

 > I never could get the audio from MMTTY into the 7100 but I did get
 > FSK working .

Spend some time with the Instruction Manual(s) for your rig:

2) If you want to use AFSK via USB you will need to select a data
    mode (LSB_D or USB_D) and configure the rig to accept audio via
    USB: Set Mode -> Connectors -> DATA MOD = *USB*

Note: While familiarizing yourself with your rig and its instruction
Manual(s), you will probably also want to set DATA OFF MOD to Mic in
order to prevent USB and ACC audio from mixing in voice modes and set
the USB MOD LEVEL for proper modulation from the USB CODEC when the
Windows Mixer level is set to between 50 and 80% (least distortion).

73,

    ... Joe, W4TV


On 2015-02-16 2:16 PM, Mark wrote:
> My thanks to N1EN and N8BU for getting me on the right track. I was able
> to get most of it working. I never could get the audio from MMTTY into
> the 7100 but I did get FSK working . My intent was to use the 7100 as a
> second radio in an attempt to try SO2R. I was able to do that during the
> WPX contest this weekend - in a small way.
>
> My set up consists of a Flex FT5000 as radio 1 with both MMTTY and 2Tone
> decode windows in N1MM+. VAC is used.
> Second radio is the IC-7100, also with both MMTTY and 2Tone decoders.
> The SiliconLabs CODEX used.
> Computer is an i7 running W7 64.
>
> I noticed that the decoded text with the Flex was much better than with
> the Icom. It seems that the audio that the ICOM is providing via their
> CODEX is not up to the same quality as what comes from the Flex (via
> VAC). I tinkered with the audio settings in the computer's control panel
> and noticed that it was basically all or nothing. With the output set to
> zero it really is zero. But there is little observable difference with a
> setting of 1 or greater. The copy did seem to get worse when set to
> higher numbers. I have both MMTTYs displaying the cross pattern. The
> pattern on the ICOM side doesn't look as crisp as the Flex side. It has
> a lot more "speckles" scattered around the pattern.
>
> As an experiment I had the ICOM on my 20M yagi and the Flex on my 80M
> dipole. I tuned to the same signal on 20M. The copy from the Flex was
> about 95% and the copy on the ICOM was about 40% even through the
> signal  strength on the Flex was much lower. 2Tone seemed to fair a bit
> better but still not as good as the Flex.
>
> Anyone have any suggestions as to how to improve the copy while using
> the ICOM CODEX audio?
>
> Mark
> K5Xh
>
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