Receiving beacon but nothing else

[g8vpg]

G4WIM has reported good results using the Technomate TM1 LNB from Amazon at £7.99. I have ordered one to try. Technomate do not actually say PLL in their spec., but just say high frequency stability. However if it is producing a T9 morse tone on the nb transponder, it must be PLL.
73 Shaun.

[G4WIM]

Yes the TM1 is PLL with a 25MHz xtal ref as I can just about detect the 25MHz ref signal leaking out of the F type connector.

Regards Tim

[M0DHP]

You say the LNB is mounted horizontal, but have you added the slight clockwise (looking at dish) skew needed? I know looking on the SDR I optimised for the WB transponder by adjusting to get the strongest beacon and noise floor.

Yes, I've tried adjusting skew and the forward / back position of the LNB in the mount - no change

I'm waiting for a new LNB and will also try a different, faster laptop. All that leaves is my MT, but that's been proven extensively on terrestrial signals.

What's frustrating is I can decode the beacon no problem, zero errors and MER 4.

[g0mjw]

I would be surprised if a DRO LNB had the phase noise performance necessary for 333ks, You really need PLL. No need to lock it for TV though.

Mike

[M0DHP]

I would be surprised if a DRO LNB had the phase noise performance necessary for 333ks, You really need PLL.

Thanks, Mike. The new one I've ordered is PLL, so will report back once it's arrived.

[G7JTT]

Have tried listening to a narrow band signal ? Just had an issue with my set up and found the LNB to be at fault. When I looked at the CW beacon it was all over the place like the PLL couldn't lock. Changed LNB and all is ok now.

John

[M0DHP]

Not yet, John. I've got a bias tee on the way and then I will try that.

73
Ray

[g8nop]

Ray, did you get any joy with the new LNB? I have the same trouble as you (great beacon pictures and nothing else) and with two different PLL LNB's. I know I'll crack it soon, but it's soooo frustrating.

[M0DHP]

Ray, did you get any joy with the new LNB? I have the same trouble as you (great beacon pictures and nothing else) and with two different PLL LNB's. I know I'll crack it soon, but it's soooo frustrating.

Not had a chance to try it yet. Will post here when I do, but it may be a couple of weeks.

[PE1BR]

I had the same problem in the beginning.
The problem was my Offset frequency was not exact enough so I didn't receive the smaller signals.
Playing around with the Offset up and down on A smal signal til you get A lock may help.