Log in

View Full Version : Can't get signal back


PABresler
03-14-2020, 04:27 AM
We use FTA just for AMC 21 for PBS channels:


https://www.lyngsat.com/AMC-21.html

The LNB support rusted through on the dish, and I replaced the dish. Now I can't get a signal back. I think the elevation and azimuth are where they were previously; I pick up a signal; the strength goes to 57%, but I can't get quality. Is this a pointing problem, or some other setting wrong?

Peter28312
fn59
03-14-2020, 10:54 AM
It's the quality that you have to watch for signal. With the linear polarity lnb's you have to have the lnb skewed properly. I've also noticed the position of the lnb in the collar makes a difference in the quality.
Terryl
03-14-2020, 04:53 PM
What type/brand of LNB? Did you use the old one? Or buy a new one?

With only 51 to 57% on the signal you may have a problem with the coax at the LNB.

Go to dishpointer.com, and enter your location, and select AMC-21 as the satellite, once this is done zoom into your location where the dish is mounted as close as you can then click on it, this will give you the pointing info and skew settings for your location, also you will get a line on a map showing where to point the dish.

Also what other settings in the LNB type do you have besides "User"? And did you change any of them? You may need to set this different if you replaced the LNB with a new one.

A photo of the new dish and LNB would help.
PABresler
03-14-2020, 09:50 PM
Thanks a lot for the advice! I replaced the LNB but it looks just like the old one. I went on the roof with the box and a small TV....signal still only 57%, so the cable was not a factor. Not sure I am pointed at the right sat. Latitude on this dish only seems to go to 50 degrees.

28314
28315
28316
fn59
03-15-2020, 11:52 AM
That's a universal lnb, so you'll have to make sure you're using universal lnb in your settings.
fn59
03-15-2020, 11:55 AM
Did you check the mast was plumb?
Terryl
03-15-2020, 03:57 PM
Thanks a lot for the advice! I replaced the LNB but it looks just like the old one. I went on the roof with the box and a small TV....signal still only 57%, so the cable was not a factor. Not sure I am pointed at the right sat. Latitude on this dish only seems to go to 50 degrees.

28314
28315
28316


It's not the latitude on that adjustment setting but the dish's elevation, you only need the longitude (azimuth) of the satellite and it's elevation at your location, you then set the skew on the LNB and you should be set.

Did you go to dishpointer and get the correct info??
PABresler
03-18-2020, 08:24 PM
I got it going....it was hell. Not easy sliding around on the roof when you're 73. Thanks for the advice!

Peter
Bluegrass
03-18-2020, 11:37 PM
https://i1058.photobucket.com/albums/t404/diana123413/60c7a653c4a12fd99b496213a701d1aa_zpsgxd93rwn.jpg~o riginal




Yeah for you Peter...You did awesome lol
Got to be careful with roof things at any age!!

Have a peachy evening and take care

https://i1058.photobucket.com/albums/t404/diana123413/cartoon/tumblr_m6nyfu9XCr1qaij4po1_500_zpsnfqobrea.gif~ori ginal
PABresler
03-20-2020, 08:49 PM
I lost the signal again. It was working well on AMC 125W with the PBS channels, and it went out with "no signal". There were no obvious changes in the system or box. My Openbox receiver only permits LNB types, C, User and KU. It was set on User when operational. I replaced the LNB with a new Universal, which was the same as the old one. I went back up on the roof; the signal peaked at 62%, but again no quality. Any ideas?

Peter
The Noof
03-20-2020, 08:51 PM
I got it going....it was hell. Not easy sliding around on the roof when you're 73. Thanks for the advice!

Peter

Careful old timer...it's just tv.
Bluegrass
03-20-2020, 09:35 PM
Careful old timer...it's just tv.



https://i1058.photobucket.com/albums/t404/diana123413/Ladyinpink.jpg~original


Exactly Noof, it is only TV and not worth an injury or worse
PABresler
03-21-2020, 04:45 PM
You never really think of yourself as old. Why did I loose the signal when it was working???
fn59
03-22-2020, 11:00 AM
You never really think of yourself as old. Why did I loose the signal when it was working???

It could be as simple as a corroded connector.
PABresler
03-23-2020, 01:00 AM
I was up on the roof again with a short cable between the box and dish. Signal peaked at 62%, but no quality.
Terryl
03-23-2020, 05:38 PM
If the cable was a good one and shorter then 25 feet, and you only got 62% then the dish may have moved off an active satellite again, when the dish and LNB are aligned correctly you should have over 75 to 95 %+ on the signal,(this depends on the length of the coax and type) this is the signal sent down from the LNB through the coax to the receiver, not from the satellite, that is the quality signal indication.

You said your openbox only has 3 selections for the LNB type, "C" "User" and "Ku", mine does not have those settings, in mine the menu for satellite setup, it has the name of the satellite, the LNB frequency, the transponder settings and so-forth.

Have you tried the "Ku" selection?

Can you take a screen shot of your menu settings?

Also what type of coax did you use for the test?? Was it rated for satellite work?? It needs to be swept to 3 GHz or labeled 2.5 GHz, coax for TV or CATV will not work too good.