Re: [time-nuts] broadband MPX signal stereo

2012-03-21 Thread Florian Teply
Am Thu, 15 Mar 2012 22:08:12 +0100 schrieb Azelio Boriani azelio.bori...@screen.it: Yes, there is people who have what in the past was expensive test equipment and now can be bought by 1/10 of the original price. The problem is that you need someone who can record 2 seconds of a signal that

Re: [time-nuts] broadband MPX signal stereo

2012-03-21 Thread Azelio Boriani
We had the SMBV100 (full options loaded) on a demo for very few days and I used it as a GPS simulator. The menus I have used didn't let me figure out what kind of operating system was underneath... On Wed, Mar 21, 2012 at 9:49 PM, Florian Teply use...@teply.info wrote: Am Thu, 15 Mar 2012

Re: [time-nuts] broadband MPX signal stereo

2012-03-16 Thread Dave Brown
EMU 0202 or 2020? I know what an 0202 is but what is a 2020? DaveB,NZ - Original Message - From: Demian Martin demian...@yahoo.com To: time-nuts@febo.com Sent: Friday, March 16, 2012 6:53 PM Subject: Re: [time-nuts] broadband MPX signal stereo I have tested a number of soundcards

Re: [time-nuts] broadband MPX signal stereo

2012-03-16 Thread Azelio Boriani
- From: Demian Martin demian...@yahoo.com To: time-nuts@febo.com Sent: Friday, March 16, 2012 6:53 PM Subject: Re: [time-nuts] broadband MPX signal stereo I have tested a number of soundcards and while the EMU 2020 has issues (serious jitter and noise from the USB interface) I can recommend

Re: [time-nuts] broadband MPX signal stereo

2012-03-16 Thread ehydra
Azelio Boriani schrieb: Yes, there is people who have what in the past was expensive test equipment and now can be bought by 1/10 of the original price. The problem is that you need someone who can record 2 seconds of a signal that is slightly beyond the actual sound card sampling capability. A

Re: [time-nuts] broadband MPX signal stereo

2012-03-16 Thread ehydra
I own a EMU0202 and when I use it with my laptop running on battery I can see in spectrum lab FFT the DCF77 at 77.5KHz and the GB time-code transmitter at 60KHz easily. The antenna is 1 meter of wire. Not bad for 100 bucks. I'm around 450km from DCF77 and maybe 800km from GB transmitter. If I

Re: [time-nuts] broadband MPX signal stereo

2012-03-16 Thread ehydra
Demian Martin schrieb: I have tested a number of soundcards and while the EMU 2020 has issues (serious jitter and noise from the USB interface) I can recommend the ESI Juli@ as having flat response and good SNR up to 90 KHz. It's a PCI card, no USB. I have measured the performance of FM MPX

Re: [time-nuts] broadband MPX signal stereo

2012-03-16 Thread Chris Albertson
On Thu, Mar 15, 2012 at 11:26 PM, Dave Brown tract...@ihug.co.nz wrote: EMU 0202 or 2020? I know what an 0202 is but what is a 2020? It was a typo, you guessed correctly. But it seem this is not the interface you want and it may even be discontinued. I'm happy with my Presonus interface box

Re: [time-nuts] broadband MPX signal stereo

2012-03-15 Thread Azelio Boriani
Are you sure that a .WAV file can support the full MPX stereo and RDS signal? I suspect that you need raw samples that a sound card can't handle. The output of a FM stereo and RDS radio discriminator are beyond the usual audio bandwidth. The output of the discriminator full bandwidth is first used

Re: [time-nuts] broadband MPX signal stereo

2012-03-15 Thread ehydra
I heard a broadband sound-card like EMU0202 should work. I asked because of the various people on the list with expensive test equipment one should be able to record a good sample. Looks there is no interest. - Henry Azelio Boriani schrieb: Are you sure that a .WAV file can support the full

Re: [time-nuts] broadband MPX signal stereo

2012-03-15 Thread Chris Albertson
On Thu, Mar 15, 2012 at 3:56 AM, Azelio Boriani azelio.bori...@screen.it wrote: Are you sure that a .WAV file can support the full MPX stereo and RDS signal? I suspect that you need raw samples that a sound card can't handle. Some audio interfaces have a low pass filter to cut off at about

Re: [time-nuts] broadband MPX signal stereo

2012-03-15 Thread Bob Camp
...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of ehydra Sent: Thursday, March 15, 2012 2:44 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] broadband MPX signal stereo I heard a broadband sound-card like EMU0202 should work. I asked because

Re: [time-nuts] broadband MPX signal stereo

2012-03-15 Thread Azelio Boriani
Yes, there is people who have what in the past was expensive test equipment and now can be bought by 1/10 of the original price. The problem is that you need someone who can record 2 seconds of a signal that is slightly beyond the actual sound card sampling capability. A signal that you can have

Re: [time-nuts] broadband MPX signal stereo

2012-03-15 Thread Demian Martin
I have tested a number of soundcards and while the EMU 2020 has issues (serious jitter and noise from the USB interface) I can recommend the ESI Juli@ as having flat response and good SNR up to 90 KHz. It's a PCI card, no USB. I have measured the performance of FM MPX adapters and tested FM

[time-nuts] broadband MPX signal stereo

2012-03-14 Thread ehydra
Hi! I'm looking for a sampled wave-file from a radio receiver MPX-signal including the RDS frequency band around 57KHz. I searched the Net but found just nothing that worked. So I ask here. Maybe someone has the possibility to sample a couple of seconds. Thank you all! - Henry --