Hughes universal LNB/OMT for HX VSAT system

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Eric Johnston

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May 14^th, 2010 at 6:10pm

To simplify installation of Ku band HX systems, HughesNet has introduced a new LNB combined with a cross-pol OMT. �One side of the OMT has a circular waveguide flange intended for connection to the feed horn. The other side of the OMT connects via a straight waveguide filter to the Hughes transmit BUC. The frequency range is 10.95 - 12.75 GHz, using two local oscillators 9.75 and 10.6 GHz selected using 22 kHz tone.

The Hughes PN is 1501882-0002.

More details HX universal LNB PN 1501882-0002

Best regards, Eric.

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Ex Member Ex Member	Reply #1 - May 31^st, 2010 at 10:30am The new LNB with 1501882-0002 is replaced with previously �LNB ( LO 11.3GHz), � previously LNB local oscillator: 11.3GHz L-band: 950-1450MHz Frequency: 12.25-12.75MHz how to set it ? Thanks in advance!
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Admin1 YaBB Admin ★★★★★ Offline Posts: 1298	Reply #2 - May 31^st, 2010 at 11:02am Select the LNB option that should appear on the config screen that looks similar to this: "XXXXX UNIVERSAL". Does this answer your query: HX universal LNB PN 1501882-0002 ? Note the new device is a combined OMT/LNB, not an LNB in isolation. Best regards, Eric.
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Ex Member Ex Member	Reply #3 - Jun 1^st, 2010 at 9:58am Thanks for your message. Yes, it is HX new universal LNB with p/n: 1501882-0002. I need use LO with 11.3G, but new universal LNB doesn't work, even if modify sbc.cfg: [RxLnbList] Pure=11.3,11.3 Invacom=10.6,9.75 could you help me to fix the issue ? Thanks, Jean
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Eric Johnston

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Reply #4 - Jun 1^st, 2010 at 10:08pm

You want to make the new Universal LNB operate with LO=11.3 GHz.

According to the information I have, this cannot be done. �You can choose either of two local oscillators 9.75 and 10.6 GHz, the upper one selected using 22 kHz tone ON.

Subtract 10.6 from your satellite downlink carrier frequency. �Can you tune the modem to the resulting �L band frequency ?

My understanding is that with the LNB text selected as "XXX Universal" or "TG_1501882-0002" you may then input the wanted satellite frequency 10.95 - 12.75 GHz and the modem will automatically select the LNB LO freq using the tone OFF or ON and calculate and tune to the corresponding L band frequency.

Note the file should be called "SBC.cfg", not "sbc.cfg".

Maybe you can do the process manually ? ie. select tone OFF/ON on the config screen and input an L band frequency. �

What can you do on your HX modem ? �What is the highest L band tuning frequency it will accept ? Does the HX modem tune as far as 2150 MHz.

The universal LNB �p/n: 1501882-0002 is similar to Invacom SPV-10M but not identical. There are some internal circuit board changes. I don't know what these are or the way it affects the operation.

Best regards, Eric.

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« Last Edit: Feb 19^th, 2015 at 12:18pm by Admin1 »

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