Problem in receiving Horizontal frequencies in single solution LNB

[arsalanj]

I have single-solution C-band LNB. I am receiving all vertical frequencies but having problem in receiving horizontal frequencies. In the Antenna settings in my receiver, I chose the option "User" instead of "Universal" and set the settings to 5750 and 5150 (I also tried swapping them too).

The strange problem I have is that if I manually enter TP of any horizontal channel after subtracting 600 from the original frequency , I get no signal. Now, if I restart the receiver, I get full signals of that channel but the signal starts dropping and after some time (2-3 minutes), it is completely gone. Now, if I again restart the receiver, I will again get the signal. This problem is not there with vertical frequencies.

What might be the problem? Is it problem in LNB or the receiver?

[arsalanj]

Anyone please help me. Suppose that I have ordinary universal LNB, not single solution LNB. I have also noticed one thing. When I lost the channel, if I unplug my antenna cable to the receiver and then reconnect, I get the channel back with excellent signals but as usual, it starts disappearing gradually until it is lost completely. This "disappearing time" is different for different channels. In some channels, it takes less than one minute while in others, it can be upto 15-20 minutes.

[Mickha]

The only time I've ever experienced this type of problem is when my LNB became damaged due to water ingress.
I used to be able to receive all vertical channels but only got horizontal channels in good weather, when the LNB dried out, and even then the picture used to degrade.
I ended up having to change the LNB and c@ble, as water had also got into that.
The first thing to check is that your connections, at both the receiver and LNB, are secure, you might want to cut off a small amount, at each end of the cable, and remake your connections, at the same time you can look for any sign of water damage.
If possible try to borrow another LNB, or try your receiver on a friend, or neighbours, dish.
Unfortunately the only way you are going to solve this problem is by testing all your components, starting with the LNB, and c@ble, and then your receiver.
Good luck and please keep us updated with your progress.

[BGonaSTICK]

Good advice from Mickha.

Swap out the cheapest parts first, but it could just be the receiver. If you have a test meter, test the output voltage on the coax (a new, 'test' piece of coax would be sensible) over the first 20 minutes from powering on (no LNB attached of course) and see if it drops off over time. Do this with it tuned firstly to a horizontal channel and then a vertical.

I have no idea about your LNB. Is it voltage-switching? Do you have a model number or any specifications for it?

There's not much call for C-Band equipment here.