AuEs 20th Dec 2015 IQ WAV

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pe1etr
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Joined: 07 Oct 2014 00:40
Location: Blackpool UK

AuEs 20th Dec 2015 IQ WAV

Post by pe1etr » 21 Dec 2015 07:28

Here is the best one I got from the Aurora Es opening last night (20/12/2015).

88.2 S Tåsjö SR P4 Västerbotten 60 kW E224 SR_P4___

https://app.box.com/s/0sdvkvh6gxc03zhr8jqo27i6tyh8o1vl

You'll need SDR# (or SDR-ConsoleV2) to play this file. It is not an audio file. There is stereo and full RDS.
The file is 85MB you need to download it!

Funcube Dongle Pro+, FM Omni in the loft

Peter Wilson
Blackpool , UK

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pe1etr
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Joined: 07 Oct 2014 00:40
Location: Blackpool UK

Re: AuEs 20th Dec 2015 IQ WAV

Post by pe1etr » 10 May 2016 14:21

I managed to extract this one from a longer IQ file, just using an audio file editor.

https://app.box.com/s/n7ymhgll3sx4olz3d7fzc0gd23a7c649

It is an IQ file not an audio file, even though it is only 6MB.

Works in SDR#, HDSDR and SDR Console v2.3

RDS with rds spy with either of the first two, rds in sdr console, but some strange results.
The sdr# native software also decodes some rds data.

The freq is actually 88.7 I was using RDS datalogger with fcd pro+.
AuEs 01/01/2016

Peter

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Patrick73
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Location: french Alps, JN35am

Re: AuEs 20th Dec 2015 IQ WAV

Post by Patrick73 » 12 May 2016 10:16

Hi Peter,

I just downloaded the short IQ file I played using SDR# (v1357).
It shows 100 kHz as the centered frequency. It seems one has to tune around 80-85 kHz to get the best reception and RDS decoding (full PS and several AF)
Patrick
Main interests : NDB, MW & FM DX'ing
REU Editor http://www.classaxe.com/dx/ndb/reu

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pe1etr
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Location: Blackpool UK

Re: AuEs 20th Dec 2015 IQ WAV

Post by pe1etr » 12 May 2016 10:50

Hello Patrick.

There was a problem recording IQ files overnight when using RDS datalogger with the FCD Pro+. The correct frequency is not displayed. That is why it was difficult to analyze the original 2GB IQ files.
I used SDR# 1430.
I'll try v1357 as you seem to have got more RDS data than me.

Peter

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Patrick73
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Location: french Alps, JN35am

Re: AuEs 20th Dec 2015 IQ WAV

Post by Patrick73 » 12 May 2016 12:01

I don't think v1357 (or another 'old' SDR# version) offers better RDS decoding.
It's just a matter of carefully adjusting BW, looping the extract where the BER is at best and maybe properly setting the MPX output level.

With BW set at 140, tuned to 84 kHz - BER peaks 62%
RDS Spy shows NRK P1 F201
AF : 88.4 88.7 88.9 89.2 89.3

SDR# native soft shows NRK P1 [F 201] and sometimes "NRK P1 G ......... SELS ....." as RT (BW set at 150)
Patrick
Main interests : NDB, MW & FM DX'ing
REU Editor http://www.classaxe.com/dx/ndb/reu

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Patrick73
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Location: french Alps, JN35am

Re: AuEs 20th Dec 2015 IQ WAV

Post by Patrick73 » 12 May 2016 13:46

I just installed RDS data logger ; it shows some AF RDS Spy do not detect : 92.5 92.6 and 101.2
But it does not show 88.4 89.2 89.3
Patrick
Main interests : NDB, MW & FM DX'ing
REU Editor http://www.classaxe.com/dx/ndb/reu

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