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https://www.satsig.net/cgi-bin/yabb/YaBB.pl Anything else >> General and other topics >> How to use Scientific Atlanta D9390 DVB-S modulator ? https://www.satsig.net/cgi-bin/yabb/YaBB.pl?num=1421714706 Message started by Tristan on Jan 20^th, 2015 at 12:45am

Title: How to use Scientific Atlanta D9390 DVB-S modulator ?
Post by Tristan on Jan 20^th, 2015 at 12:45am

Hi,

I have a Scientific Atlanta modulator D9390 can i use this with MPEG-4 Encoder as its ASI source? Thanks in Advance!

Title: Re: DVB-S modulator
Post by Oasis Networks on Jan 20^th, 2015 at 1:49pm

I think it should....as you mentioned it has an ASI interface and it is just a modulator, not a combined encoder/modulator.

Title: Re: DVB-S modulator
Post by Tristan on Jan 21^st, 2015 at 1:39am

Hi Oasis,

Thanks for the advice. There is confusion on the what the modulator can process since it was DVB-S compliant. On the DVB-S standard it refer with MPEG2 compression while on DVB-S2 standard it refer with MPEG4 compression. Then, it is possible on the DVB-S compliant modulator.

Title: Re: DVB-S modulator
Post by Admin1 on Jan 21^st, 2015 at 10:29am

Tristan

The exact model and options of your modulator matter.

I suggest you contact Scientific Atlanta and ask if it can do what you want regarding inputs. Regarding outputs, do you want the advanced modulation and FEC options of DVB-S2 ?

SA's contact details are at the end of this pdf document:
https://www.tulsat.com/productImages/DownloadFiles/ModelD9752_D9390_Advanced_Modulator-7006183.pdf

Best regards, Eric.

Title: Re: DVB-S modulator
Post by Tristan on Jan 22^nd, 2015 at 1:03am

Hi Eric,

I will try to contact Scientific Atlanta regarding this. Regarding the output, as of this time our required parameters appear to be available on our Scientific Atlanta D9390 modulator (DVB-S) modulation and FEC. When the MPEG-4 Encoder is available in our office, I will try this setup and update you soon guys.

Best Regards,

Title: Re: DVB-S modulator
Post by Oasis Networks on Jan 22^nd, 2015 at 5:15pm

Hi,

Just a small note - I think the MPEG-4 started to be popular around 2007-2008. It is possible that when the modulator you have was designed, the MPEG-4 was just not common enough in the market and therefore the manufacturer did not provide and reference about it.

Please try and let us know if it works, i am curious as well :)

Kind Regards,
Nimrod

Title: Re: DVB-S modulator
Post by Tristan on Jan 23^rd, 2015 at 1:11am

Hi Oasis and Eric,

Yesterday we have a equipment demo regarding MPEG-4 Encoder in our office. We tried to the ASI output of the Encoder to ASI input of the SA modulator (D9390). Since we are not able to transmit that time, we only verify the Input status on the Modulator and noticed that the signal is lock with no alarm on the unit. Both LED indicator on the back of the unit is on Green Status (L1 and L2).
I think that it is possible for Scientific Atlanta D9390 (DVB-S) modulator to process ASI signal from MPEG-4 Encoder.

Additional Info: The Encoder that we used for testing is WELLAV UMH252.

Best Regards,