radyne comstream abr202 digital audio reciever

[professor_jonny]

hi there i have a few radyne comstream abr202 satelite digital audio reciever set up in a rack mount array with a switch and transmitters for life fm and radio rema and our local wave fm installed to provide radio for local opunake residents.

im looking for the software to program them called ANMS  but cant find it would any one happen to have it or able to direct me to program them, alternativly i can send them away for programming but is very expensive and as it is non profit we hope to do it our selves to save cash.

it cost $12k for the hole setup and that broke our budget and another $1200 each to reprogram them is to much for us to cope in the current finincial state.

i have managed to log in via hyper terminal and play around with the relay and printer outputs but dont know if i can reprogram them from this to select a different down link radio stream off sat.

any ideas?

cheers jono

[professor_jonny]

ha ha i have found out that the company was brought out by tiernan several months ago and in the last few weeks brought out by international datacast and have found a contact to help me sort it out thanks guys and gals.

hopefully we shal have more than classic hits in south taranaki soon!!

i even noticed thay have digital transmitters wich would be cool but sadly no one would be able to listen as dab radio is not main stream in nz yet.

do the goverment plan to implement this in the future to local radio stations like what they done in the uk as now they have done it for tv in nz?

[professor_jonny]

i have managed to program the deoder and now need to point the dish and have a few questions as it is a bit out of the norm.

i have a lnb for the setup it is a phase lock loop QPSK modulation which i believe different to that of a normal freeview/sky decoder correct?.

what is the normal modulation of a typical lnb im guessing it is dielectric resonance oscillator BPSK modulation?.

the dish has to be pionted at d1 vertical polarasation to pick up life fm or radio rhema is my best bet to drag up my sat decoder and temporally replace the lnb with a freeview one line it up then switch back the lnb?
or will my normal sat finder and f-9000 decoder work with what is there currently (im guessing not).

the dish is a 3.7mt solid 3mm thick aliminum dish and the lnb is a c120 gland with a small scarlar ring bolted to the flange definatly ka band.

why would they beam with a different format to freeview for a free to air station? instead of paying $200 for a free view decoder and  we have had to pay $3000 for a special decoder 2nd hand and the bit stream rate is only 192kbps stereo at 20khz in an (ISO/MPEG Layer II/IIA) with a carrier clock pulse in the stream for timing and adds for different regons if they have a switch with a pre recorded loop on tap on each site if they so wish.

any help is welcome.

[professor_jonny]

would there be other fta stuff i could pick up with this alternative qpsk modulated  lnb? or would it all require pripority decoders?

[Overthehill]

Hi Johnny, I am just new and looking at your post and wondering if you are still on the project? Radio Rhema recently changed from D1 to Intelsat 8? Radyne Comstream receivers have been replaced with SFX 3102 Pro Audio receivers. I think on 1168.3500 , 520.000 Ksym/sec , Mod Standard DVB-S2 . Can you confirm if this info is correct. I tried with a free view receiver to lock onto Intelsat 8 but was having trouble finding it. Was getting good signal strength but no quality trying to lock onto Airirang. Any info from anyone appreciated.

[professor_jonny]

far as i know its on d1 no one has come down and moved the dish that i know of? it is stil working here at the moment.

raydeme com stream sold out to one firm then they were brought out by the current owners and they were rebranded and are stil in production as far as i know.

our setup has a 3mt solid prim focus dish but im un sure if it needs to be so big as i think it was to combat rain fade.

the lnb is not a normal one it uses a special qpsk modulation and its tied in with satelite remote monitoring software from base to switch to local ads and local radio after hours and what not.

their software and decoders would all need replacing for the whole country if they switched recievers and they were a bit in the red in the books a while back so i doubt they have done any thing major but i dont know i have not asked as it is working.

you wont pick it up with a freeview reciever and a normal lnb.

[satboy]

the lnb is not a normal one it uses a special qpsk modulation

An LNB or LNBF sole function is frequency down shifting with voltage switched polarization  The demodulation is completely done by the tuner with standard DVB-S ones supporting both BPSK and QPSK


That special LNB must be for an out of band frequency that's being used..

[professor_jonny]

That is not what i was told by the guru at radio rhema,
i definatly had to use a special lnb a normal one wont work.
next time ill go up and let ya know but it know it has comstream on the housing of it.

from what i understand the lnb has a demodulator inside and sends down a digital signal down the wire to the decoder, but that is as far as i know.

but the new decoders i don't know i don't have one.

[satboy]

from what i understand the lnb has a demodulator inside and sends down a digital signal down the wire to the decoder, but that is as far as i know.

To do that the LNBF would need to have a tuner built-in as a frequency lock has to happen before demodulation can occur.  To comment further on this we would need to know the frequency and symbol rate of this service.

[Overthehill]

The PLL LNB are more stable and can receive a narrower frequency width of signal. When the Rhema signal changed from D1 to Intelsat 8 the same LNB was continued to be used, just the dish re-aligned to Intelsat 8. LNB used = Norsat 1208HB in their 1000HB class 12.25 to 12.75 GHz (even though I think the new receive frequency is below the lower side of that range. L:.O. stability = 5 to 25 KHz L.O. frequency 11.300 Output frequency 950 to 1450 MHz. The LNB only converts frequency - no other fancy digital convertions. Feeds into IDC Superflex Proaudio sat receiver.