QUALITY METEOFAX RECEPTION WITH THE RSP RECEIVER

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glovisol
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Re: QUALITY METEOFAX RECEPTION WITH THE RSP RECEIVER

Post by glovisol » Wed Nov 21, 2018 4:51 pm

WEATHERFAX AND THE RSP DUO RECEIVER - COMPARISON OF OTHER RECEPTION/DECODING METHODS

1. Enclosed below meteochart received with the old SONY WORLDBAND RECEIVER ICF-SW77. Antenna used: 135m Beverage and frequency was 3855 KHz (better reception in night time). Quality is good, but receiver tuning requires some experience.

2. The HF Weatherfax application can be readily downloaded (at a cost of EUR 4.99) to an Android tablet or phone and it decodes Meteofax. The tablet or phone is kept near the PC and the sound coming from the PC's loudspeaker is taken up by the tablet's microphone and the chart is printed out on the screen. I had my doubts about the tablet picking up extraneous background noises, but in effect this app works quite well.
Attachments
Sony RX_1711.18 H.19.06.jpg
The old Sony receiver is still competitive!
Sony RX_1711.18 H.19.06.jpg (125.12 KiB) Viewed 3265 times
Ice chart via Tablet.jpg
Tablet Meteofax audio decoding
Ice chart via Tablet.jpg (49.98 KiB) Viewed 3265 times
Ice Chart via  PC.jpg
PC Meteofax audio decoding
Ice Chart via PC.jpg (56.87 KiB) Viewed 3265 times

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glovisol
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Joined: Thu May 10, 2018 6:42 pm
Location: Piedmont, Italy

Re: QUALITY METEOFAX RECEPTION WITH THE RSP RECEIVER

Post by glovisol » Wed Nov 21, 2018 4:55 pm

Hi Mike, thanks for the suggestions, I shall test later as soon as signals become available.

Cheers,

glovisol

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Mike2459
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Re: QUALITY METEOFAX RECEPTION WITH THE RSP RECEIVER

Post by Mike2459 » Wed Nov 21, 2018 5:00 pm

I tried using a receiver the other night also, It seemed to do well, there were a couple of glitches. Of course none of this explains the smearing of the imagery that you encountered. I can't envision a performance issue being the cause.

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Mike2459
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Re: QUALITY METEOFAX RECEPTION WITH THE RSP RECEIVER

Post by Mike2459 » Wed Nov 21, 2018 6:04 pm

Disable indexing
Set your power plan to high performance

Can not run on battery power with this power plan!!

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Mike2459
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Re: QUALITY METEOFAX RECEPTION WITH THE RSP RECEIVER

Post by Mike2459 » Wed Nov 21, 2018 6:30 pm

NMF Boston Weather FAX received w/RSP2, Fldigi on Win7-32 Pro Intel core 2 CPU optimized for performance

wefax_20181121_131956_9108100_ok.jpg
wefax_20181121_131956_9108100_ok.jpg (145.05 KiB) Viewed 3252 times

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glovisol
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Location: Piedmont, Italy

Re: QUALITY METEOFAX RECEPTION WITH THE RSP RECEIVER

Post by glovisol » Wed Nov 21, 2018 7:30 pm

Fantastic! Very good result, Mike.

I have been looking carefully into the internal audio connection between SDRuno output and SeaTTY/Fldigi input and I discovered that in reality output from the speakers is picked up by the laptop microphone so the "smearing" must be provoked by an echo between the two signals, direct and echoed. Unfortunately, if I disable the microphone, the connection to the Wefax software disappears.

I installed VAC, but until now I have been unable to get the audio from SDRuno to the Wefax sofware. I hear the "ciao!" all right, SeaTTY hears "ciao!" as well, but no way that SeaTTY hears the audio from SDRuno output. I can get the SDRuno output to connect to Cable 1 or Cable 2, I can see SeaTTY connected to one of the cables, but no signal goes thru, only the "ciao!". The level indicators of the VAC cables also do not show any audio from SDRuno going thru.It is like being a step away from the solution, but not getting there.

Any ideas? Shall do more work tomorrow.

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Mike2459
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Re: QUALITY METEOFAX RECEPTION WITH THE RSP RECEIVER

Post by Mike2459 » Wed Nov 21, 2018 8:20 pm

I've encountered this before. the feature you need is disabled (it's the default setting for windows). You need to enable it here:

First shut down SDRUno and fldigi if they are running. I've had SDRUno crash while changing audio settings. Is should not do this but it does.
Right click on the speaker icon, select recording devices.


Capture.JPG
Capture.JPG (36.36 KiB) Viewed 3244 times
Right click in the white area of the window (above). A selection box should appear showing two possible selections: 'Show Disconnected Devices' and 'Show Disabled Devices', Select both boxes, then Rec.Playback should appear as disabled in the above window. Select it, then select 'Properties'. In the properties window under 'Device Usage' change the setting from disabled to enabled - Click 'OK'


This is from another PC but It should be similar to this:
Capture2.JPG
Capture2.JPG (67.45 KiB) Viewed 3244 times
Rec, Playback and Stereo Mix perform the same function.
After making these changes restart the computer

You then should be able to adjust your record levels in the Levels Tab, In the Enhancements tab select 'Disable all Sound Effects'.
In fldigi select Rec. Playback as the capture source.

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glovisol
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Re: QUALITY METEOFAX RECEPTION WITH THE RSP RECEIVER

Post by glovisol » Thu Nov 22, 2018 8:27 am

Hi Mike, thanks for your kind assistance. Unfortunately I do not have the "IDT High Definition Audio CODEC", perhaps my sound card is not suitable. I am enclosing PC screens of the Sound windows without and with VAC.
Attachments
Playback.png
Playback.png (39.25 KiB) Viewed 3210 times
Playback with VAC.png
Playback with VAC.png (44.06 KiB) Viewed 3210 times
Recording with VAC.png
Recording with VAC.png (46.02 KiB) Viewed 3210 times

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glovisol
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Re: QUALITY METEOFAX RECEPTION WITH THE RSP RECEIVER

Post by glovisol » Thu Nov 22, 2018 8:28 am

Here is the last one. Suspect I have to get another PC!
Attachments
Recording.png
Recording.png (36.85 KiB) Viewed 3210 times

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glovisol
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Location: Piedmont, Italy

Re: QUALITY METEOFAX RECEPTION WITH THE RSP RECEIVER

Post by glovisol » Thu Nov 22, 2018 9:48 am

Hi Mike, I finally made it using VAC. Will post details later. Now that it works, of course propagation is down this morning.

Cheers,

glovisol

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