Low/no signal on some 118 and 129 TP's

[indo_canadian]

Hi:

I'm having some signal issues on some 118 and 129 TP's. I have a 24" dish with 3-lnb step bracket.

I connected the 118/119 LNB using a coax barrel connector direct to my receiver (megatvi 3000). I get ~75% signal/quality on 118 TP 11715. On the TP 12033 I get 30% signal (green) which then drops to 20% (red) and then totally down to 0% (red).

Similarly, when I connect the 129 LNB direct to my receiver, I get 80% signal/quality on TP 12516 and about 52% on TP 12224. But on TP 12472 I get 100% (red) and I can't CNN HD channel 9436 which is on this TP.

Can someone please advise what do I need to do in order to get good signal on the above TP's?

Also is there a particular sequence that the lnb's should be connected to the diseqc switch? I discovered that when I have 118/119 lnb connected to a port that's after the 110 lnb, then I get low signal, example, 110 in port 1 and 118/119 in port 2 gives me 45% signal on 118 TP 11715. When I connect 118/119 in port 3 and 110 in port 4, then I get ~75% signal/quality on 118 TP 11715. The 110 signal remains 90% and over. So I'm thinking that I should follow this sequence:

Port 1 - 118/119
Port 2 - 129
Port 3 - 110

Does that look right?

Thanks in advance.

[Terryl]

What brands/types of LNB's are you using?

Dish, BEV, other?

If you are using the Dish 1000+ LNB then you need to set the Diseqc switches to the following, Diseqc port #1 = 119, Diseqc port #2 = 110, Diseqc port #3 = 129, Diseqc port #4 = 118, and you can't use an external switch with these LNB's.

If they are not Dish or BEV LNB's then it does not matter what the switch setup is.

On other brands of LNB's the DC switching voltage comes into play, +13.5 to +15.5 volts equals all the "R" transponders, and +17.5 to +19.5 equals all the "L" transponders.

For the transponder 12224 on 129 you may have a lower then normal signal as that is a spotbeam and it may not be near your location.

Now, your problems could be the lack of DC switching voltage out to the LNB, some of the cheaper coax uses a copper plated steel center conductor, this can rust over time, this will cause a drop in the DC voltage, also too long a run of cheap coax can cause all sorts of headaches, a corroded coax connector or water is the coax can also cause this.

To see if you have the CPS center conductor use a small magnet, if it sticks to the center conductor you have the CPS center.

[indo_canadian]

What brands/types of LNB's are you using?

Dish, BEV, other?

If you are using the Dish 1000+ LNB then you need to set the Diseqc switches to the following, Diseqc port #1 = 119, Diseqc port #2 = 110, Diseqc port #3 = 129, Diseqc port #4 = 118, and you can't use an external switch with these LNB's.

If they are not Dish or BEV LNB's then it does not matter what the switch setup is.

On other brands of LNB's the DC switching voltage comes into play, +13.5 to +15.5 volts equals all the "R" transponders, and +17.5 to +19.5 equals all the "L" transponders.

For the transponder 12224 on 129 you may have a lower then normal signal as that is a spotbeam and it may not be near your location.

Now, your problems could be the lack of DC switching voltage out to the LNB, some of the cheaper coax uses a copper plated steel center conductor, this can rust over time, this will cause a drop in the DC voltage, also too long a run of cheap coax can cause all sorts of headaches, a corroded coax connector or water is the coax can also cause this.

To see if you have the CPS center conductor use a small magnet, if it sticks to the center conductor you have the CPS center.

I'm using a mix of LNB's. 110 - generic, 118/119 - generic, 129 - Royal+. My receiver is megatvi shd3000. I will try to switch the 129 coax cable and see if it helps.

Thanks.

[Terryl]

Check all your other connections also....And don't forget to turn the receiver off with the switch in back, (or unplug it from the AC wall connection) or you could damage your switch.