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C-Band to C-band extended tranceiver dish

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kenshin03
Ex Member


Aug 3rd, 2011 at 6:29am  
Sir,

Can I modify my transceiver C-band dish in order to use it for C-band extended application?

thanks,

ken u.
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Eric Johnston
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Reply #1 - Aug 3rd, 2011 at 9:21am  
What exactly do you mean by "C band extended" ?

Investigate the frequency range of your existing receive LNB. You may need to use an LNB with a wider input frequency range. Watch out for local interference from WiMAX systems.

Investigate the frequency range of your existing transmit BUC/HPA.

If you have a transeiver device investidate its range of frequency operation also. This will be particularly relevent if the RF side of the transeiver is at 4/6 GHz and you are using a low noise amplifier (LNA) and high power amplifier (HPA).

Investigate the frequency range of your existing tx/rx filters, OMT, polariser (if used), and feed horn system.

The dish reflector itself will work fine.

Best regards, Eric.
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kenshin03
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Reply #2 - Aug 3rd, 2011 at 10:09am  
I'm just curious if we can use our C-Band dish on transmitting and receiving on extended C-Band frequency range. The dish is designed for C-Band use only and its your choice if you want to add extended C-Band,unfortunately we only purchase the C-Band only. I guess we have to replace  the LNB, BUC/HPA, filter, OMT and feed horn so we can use it on extended C-Band frequency. The dish reflector is the only part we can use.   

Thank you for your reply sir.

ken u.

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Eric Johnston
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Reply #3 - Aug 3rd, 2011 at 10:58am  
You need to be specific.
What exactly do you mean by "extended C band" ?
There are various degrees of "extension".


Band Transmit Frequency (GHz) Receive Frequency (GHz)
Standard C-Band 5.8506.425 3.6254.200
Extended C-Band 6.4256.725 3.4003.625
INSAT/Super-Extended C-Band 6.7257.025 4.5004.800
Russian C-Band 5.9756.475 3.6504.150
LMI C-Band 5.7256.025 3.7004.000

Note that any particular satellite may not use all of the full ranges above.
Note that any particular satellite may not match up to any the ranges above.
Note that your wanted carrier frequencies may not be at the extreme band edges.

Find out what frequencies you want to use, then compare with the specifications of your equipment.

Best regards, Eric.
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kenshin03
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Reply #4 - Aug 5th, 2011 at 6:33am  
Now sir I don't have the specific band to use, I'm just researching in case we need to operate on extended C-Band. Basically I have to change some parts on our dish to make it possible only the reflector is the only thing I can use since it is design for C-Band only.

thankyou ver much,

ken u.
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