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https://www.satsig.net/cgi-bin/yabb/YaBB.pl Anything else >> General and other topics >> BUC Info C or Ku band ? Waveguide ? https://www.satsig.net/cgi-bin/yabb/YaBB.pl?num=1255633181 Message started by n1ghtwalk3r on Oct 15^th, 2009 at 7:59pm

Title: BUC Info C or Ku band ? Waveguide ?
Post by n1ghtwalk3r on Oct 15^th, 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

Title: Re: Buc Info
Post by Eric Johnston on Oct 15^th, 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.

Title: Re: Buc Info
Post by n1ghtwalk3r on Oct 15^th, 2009 at 8:49pm

so its ku-band right

Title: Re: Buc Info Ku and C band waveguides
Post by Eric Johnston on Oct 15^th, 2009 at 9:07pm

�

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

Best regards, Eric.

Title: Re: Buc Info
Post by n1ghtwalk3r on Oct 16^th, 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

Title: Re: Buc Info
Post by Eric Johnston on Oct 16^th, 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.