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Satellite Internet forum › LinkStar Forum: VSAT hubs and terminals › How to adjust LNB frequency to 10 GHz

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How to adjust LNB frequency to 10 GHz

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Ex Member

Ex Member

Mar 8^th, 2007 at 4:41am

I pointed the dish to express 4A ,I entered all required Data �correctly but error value still over range.

The LNB Model is NJR2784HH ,I used it for 2 way.

when i want to point my dish to any satellite , I use tv reciver and change LNB from UNV to �10 GHZ �then enter channel freq and SR then get �signal.
Now I want to adjust the LNB freq to 10 GHZ by linkstar modem commands .

please help me.

« Last Edit: Jun 27^th, 2007 at 8:40am by Admin1 »

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Ex Member Ex Member	Reply #1 - Jun 26^th, 2007 at 12:47pm The -f parameter in the save bootparam command specifies your LNB freq. oscillator. You just have to enter there the teleport frequency-LO (in Hz).
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Eric Johnston

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Reply #2 - Jun 26^th, 2007 at 7:23pm

The NJR2784H LNB has a fixed 10 GHz LO frequency.

A universal satellite TV LNB has 9.75/10.6 GHz LO frequency, switchable using a 22kHz tone.

If you have lined up the dish using a universal satellite TV LNB set to 9.75 GHz and a satellite TV receiver, then if you change to a NJR2784H 10 GHz LNB and linkstar modem the L band frequencies will all be 250 MHz lower.

Subtract the LNB LO frequency from the satellite downlink frequency to get the receive L band cable frequency.

The latest DVB-S2 linkstar modem spec says it is "universal LNB compatible" so I guess it has commandable LNB voltage or 22 kHz tone to switch the LNB frequency. � Invacom do high quality universal VSAT LNBs with various switchable LO frequencies and either voltage or 22 kHz tone to control the frequency choice. �I don't know the linkstar commands to use.

I am not aware that the older linkstars had this facility, instead you had to pre-buy the correct LNB, with either 9.75, 10, 10.6, 11.3 GHz LO frequency, according to where you wanted to use it.

I am pleased with the trend towards VSAT modems becoming compatible with universal LNBs. �It will encourage the use this this new TRIA which comprises a switchable universal PLL LNB and a 3 watt Ku band BUC all in one neat small module.
wxw
Best regards, Eric.

« Last Edit: Sep 28^th, 2007 at 11:38am by Admin1 »

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