ARGO settings. Please need help. Thanks

[Rainer Ehlert]

Hi,

Perhaps somebody could please help me in understanding how to set the right Peak bar in ARGO. Finally I managed to get some signals into it  :-)

In most of my videos the meteor hits have been between 1420 and 1450 Hz. I measured some screenshots with Photoshop to see where the impacts where and so I came up with this vales. I have seen taht I also have some impacts higher and lower then the mentioned values.

Measuring Hz at which the ping is located.

Look at the screen shot. I know how many pixels I have from 76 308 kHz to 76 311 kHz and so I can define how many Hz per pixel I have. Then I measure from 76 308 Hz to the center of the meteor scatter the distance and so I know at which Hz the ping was. As said above most of them are in +1420 Hz and +1455 Hz approximately but I have had some over this value and under this value and so with a bandwidth of 45 Hz of the right bar they would not be depicted.

How will ARGO depict the meteor scatter over and under the Hz values I am mentioning ?

I there a way like in Spectrum Lab to define the bandwidth of that bar ?

Another setting I would like to know to find out is. What happens if I use a different frecuency on another beacon and then meteor scatter is at a different value then above ? How do I know where to set the center of the right bar ?

I ahve seen in the Roswellmeteor.com page that different users have different Hz Peak values settings. Like 440 Hz, 880 Hz and 1010 Hz.

Thanks for any help

regards Rainer

[stanne...@gmail.com]

Hello Rainer,

The setup for ARGO, when using it to display and log meteor activity, is to have your receiver set for USB and tuned about 1.5 kHz below the carrier frequency of the distant station. I then tune the receiver slightly to center the echoes in ARGO around 1000 Hz. The goal is to keep the echoes in the audio's bandwidth around 500 to 1000 Hz. I use the full audio band mode to establish the exact audio frequency where the pings are being seen. Once I am sure the pings are visible in ARGO and centered on 1000 Hz, I click on a displayed ping. That will take you to one of modes where you can adjust the bandwidths (modes) for finer resolution. We use Mode 10 most of the time.

Regards

Stan

RoswellMeteor.com

[Rainer Ehlert]

Hi Stan,

Thanks. Now the picture is clearer :-)

At the moment I have USB with 20kHz because that is what I have read in many articles I have read. Will test with 1.5 kHz.

I have seen in the videos I record over up to 11 hours that the ¿range? of what I have recosgnized as meteor scatter is around +- 150 Hz. Can be more and can be less and that is what made me doubt about the 40 Hz bandwidth when using it vertical. OK, I am just beginning and still learning. In this regard do Meteor sctter alwasy appear in such a narrow bandwidth of 40 Hz ? If yes , then I guess I have ghost scatters from other things :-)

Thanks again and will let it run tonight and check tomorrow visually my video and compare to the ARGO graph.

regards Rainer

Below a link to the captured ¿ metoer scatter ? from September 19 to September 20. Length of video is 2:35 minutes They all were around +1460 Hz measured from 76 308 000 Hz

https://rainerehlert.com/000_RTLSDR/20200920/20200919-20_RMO-NHSA.mp4

[Stan Nelson]

Hi Rainer,

 

If you can send me screen captures of your settings of the receive setup and ARGO, that will help. I’ll send some of mine to guide you after I see where you’re at.

 

Stan

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[Rainer Ehlert]

Hi Stan,

Here you go.

Setup of ARGO and SDR# as well as screenshot of Virtual Cable.

regards Rainer

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[Rainer Ehlert]

Hi Stan,

Another problem I have is that I have sometimes a good signal and sometimes a bad signal but looking at the videos my dB values stay stable.

Thanks and regards Rainer

[Stan Nelson]

Hi Rainer,

 

Not sure what I’m seeing. I’m working on some setup details that may help. Hope to get them to you later today.

 

Can you describe your setup for me?

 

Stan

 

From: radiom...@googlegroups.com <radiom...@googlegroups.com> On Behalf Of Rainer Ehlert
Sent: Monday, September 21, 2020 11:54
To: RadioMeteors <radiom...@googlegroups.com>
Subject: Re: ARGO settings. Please need help. Thanks

 

Hi Stan,

 

Another problem I have is that I have sometimes a good signal and sometimes a bad signal but looking at the videos my dB values stay stable.

 

Thanks and regards Rainer

 

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[Rainer Ehlert]

Hi Stan,

Thanks.

It is a RTL-SDR v3 with a 4 element Yagi antena connected to a PC via a 5 meter active USB 3.0 cable from Cable Matters.

I am using SDRSharp as you saw in the screenshot.

The Yagi accroding to the specifications of the producer is for Radio FM, VHF from 45 to 210 MHz and for UHF from 470 to 860 MHz.

As you can see in my different videos I do get meteor scatter and some other scatter.

regards Rainer

[Dennis Condron]

Rainer, consider narrowing the spectrum width of Argo by using QRSS mode 10 as an example. What you have now is that Argo set to too high of spectrum width (~300 - 1600 Hz) to be typically used for meteor return display.

Denny

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[Stan Nelson]

Hi Rainer,

 

You may have seen a response from Dennis about changing the mode setting in ARGO. That should help.

 

I plan to send you some pix of my settings that should guide you.

 

I see you are trying to receive DTV Channel 8, 180.31 MHz. You have SDR# set to 180.308.000 that would produce a 2 KHz tone/ping. Try setting it to 180.309.000. That should give you about 1 kHz. Also adjust the screen resolution to a higher figure by going to the FFT Display tab. I uses 65536. You’ll get much higher resolution . Using the Zoom slider, adjust it until you get about 20 to 50 kHz of view. Watch the display for a random ping. It will be more obvious with these settings.

 

I’ll send you some more details later today.

 

Stan

 

 

From: radiom...@googlegroups.com <radiom...@googlegroups.com> On Behalf Of Rainer Ehlert
Sent: Monday, September 21, 2020 12:07
To: RadioMeteors <radiom...@googlegroups.com>
Subject: Re: ARGO settings. Please need help. Thanks

 

Hi Stan,

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[Rainer Ehlert]

Hi Denny,

Thanks. I was using that setting in order to know where I get the pings as Stan recommended.

I am just analizing visually a video I made from eysterday to today in the morning and the mos echoes are at 174 309 500 having set 174 308 440 (this in order to get the strong line out of the band. So makign a calcualtion my pings are around 1 kHz +- 100 Hz. I ahve seen some echoes farther right as well as farther left from 174 309 500.

This TV transmitter with 180 kW power located in Austin Texas has given me so far visually the best echoes. I ahve analized so far visually about 4:30 hours and counted about 50 echoes.

Unfortunately I do not know what I did and the audio is scrambled. Tonight I will let it run again.

Argo did work OK for about 6 hours and the at 04:08 am it froze ... Also the rpoblem with the signal. Will start to test when I finish my video.

Thanks a lot and regards

Rainer

On Monday, September 21, 2020 at 1:07:43 PM UTC-5, Denny - K0LGI - wrote:

Rainer, consider narrowing the spectrum width of Argo by using QRSS mode 10 as an example. What you have now is that Argo set to too high of spectrum width (~300 - 1600 Hz) to be typically used for meteor return display.

Denny

On Mon, Sep 21, 2020 at 12:54 PM Rainer Ehlert <rsf...@rsfotografia.com> wrote:

Hi Stan,

Another problem I have is that I have sometimes a good signal and sometimes a bad signal but looking at the videos my dB values stay stable.

Thanks and regards Rainer

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[Rainer Ehlert]

Hi Stan,

Yes, just read it.

Yesterday I had good echoes using Channel 7 174 MHz froma tower in Austin Texas transmitting with 180 kW power. This one is 960 km ~ 597 miles away from my site.

I used 174 308 440 and got a lot of echoes around 174 309 500 using USB and a bandwidth of 1500 Hz.

Thanks for all the help. Makes life easier :-) Will keep testing.

regards Rainer

On Monday, September 21, 2020 at 2:09:13 PM UTC-5, Stan Nelson wrote:

Hi Rainer,

 

You may have seen a response from Dennis about changing the mode setting in ARGO. That should help.