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  Satellite Internet forum › General and other topics › BUC Info C or Ku band ? Waveguide ?
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BUC Info C or Ku band ? Waveguide ?

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n1ghtwalk3r
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Oct 15th, 2009 at 7:59pm  
Guys i have buc that doesn t indicate if its c-band or ku-band  just says

made in japan

p/n 1026739
rev 006
s/n A023150B

DC INPUT
+15VTO+30
RF OUTPUT
CAUTION  +10DBM MAX
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« Last Edit: Oct 16th, 2009 at 11:03pm by Admin1 »  
 
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Eric Johnston
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Reply #1 - Oct 15th, 2009 at 8:45pm  
If the output waveguide flange is square and the waveguide aperture 0.75" x 0.375" then it is a Ku band BUC.

If the output waveguide aperture is larger and the flange rectangular then it is a C band BUC.

Note the CAUTION +10 dBm max.  That is the maximum allowable L band input power.  Exceed that and you risk damaging the BUC.

Best regards, Eric.
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n1ghtwalk3r
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Reply #2 - Oct 15th, 2009 at 8:49pm  
so its ku-band right
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Eric Johnston
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Reply #3 - Oct 15th, 2009 at 9:07pm  
...  ...

Send me a picture of your waveguide end, if you wish.

Best regards, Eric.
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« Last Edit: Oct 16th, 2009 at 10:42am by Admin1 »  
 
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n1ghtwalk3r
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Reply #4 - Oct 16th, 2009 at 7:01pm  
its the one with the circle i will re-check is it possible to get c-band service on 1.2? meter dish
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Eric Johnston
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Reply #5 - Oct 16th, 2009 at 8:27pm  
That circle, surrounding the Ku band waveguide aperture, is for a rubber "O" ring sealing gasket.  The opposing waveguide should preferably have a flat surface.

Whether or not a 1.2m diameter dish is a suitable size for C band reception depends on the downlink carrier power from the satellite.  Most C band receive dishes are 1.8m or larger since C band satellite beams are generally low power.  A larger dish helps minimise interference from adjacent satellites.

For C band uplinking (two way) operation, larger dishes, like 1.8m diameter upwards are recommended as they have a main beam beamwidth more compatible with typical inter-satellite spacings.

Best regards, Eric.
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« Last Edit: Oct 16th, 2009 at 10:46pm by Eric Johnston »  
 
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Email me: eric@satsig.net

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