el bandido
02-24-2023, 11:07 PM
I bought the VuPlus Zero4K receiver soon after it was first released. The signal meter has always been a bit crazy on it. Some people have graded the performance of this receiver by mostly what the signal meter says. Tonight, I made a comparison of signal strengths between the Zero4K and the Octagon SF8008. I chose the Octagon for no other reason besides it being available.
There is a transponder on 117w that is DVB-S2 8psk with a fec of 8/9. According to the charts, it takes about 10.5 db of signal to lock this transponder. The Octagon SF8008 usually shows around 15 db on this transponder, so I de-tuned the dish by moving it one click at time until I lost signal lock. Then I moved it back two clicks. The results of what the SF8008 and the Zero4k did are shown below.
The signal in db is currently broken on the Zero4K, so I set the SF8008 to read in percent. This was done in attempt to make the signal readings equal. Both receivers are running the same image.
In the de-tuned state, the SF8008 shows 67 percent and the Zero 4K shows 100 percent.
17664<-------------------->17665
Next, we can look at the signal strengths in satfinder:
17666<-------------------->17667
The dish is moved back two clicks to the point where lock is lost.
17668<-------------------->17669
The satfinder shows both receivers bouncing from Lock to No Lock and No Signal in the last screen captures. We would think since the Zero 4K would still be showing an usable signal in the end because it was stronger in the beginning. But that is not the case! In the end, neither receiver can produce anything that is usable.
Sure, some receivers will operate and perform better than others. And some receivers can perform a bit better on certain frequencies than others. I have done many reception tests with different fta satellite receivers, and have yet to find one that performed noticeably better than all of the other receivers on marginal signals. Granted, there are some receivers that perform poorly, but a poor performing receiver is usually consistent and performs poorly in other areas too.
Don't pay much attention to what a fta receiver reads in signal strength. Pay attention to the channels you get or don't get. Find out WHY if you have one receiver that is outperforming another receiver by a wide margin under supposedly identical environments or circumstances. Most of our fta receivers should perform pretty much the same in the signal receiving area, providing all things are equal...
There is a transponder on 117w that is DVB-S2 8psk with a fec of 8/9. According to the charts, it takes about 10.5 db of signal to lock this transponder. The Octagon SF8008 usually shows around 15 db on this transponder, so I de-tuned the dish by moving it one click at time until I lost signal lock. Then I moved it back two clicks. The results of what the SF8008 and the Zero4k did are shown below.
The signal in db is currently broken on the Zero4K, so I set the SF8008 to read in percent. This was done in attempt to make the signal readings equal. Both receivers are running the same image.
In the de-tuned state, the SF8008 shows 67 percent and the Zero 4K shows 100 percent.
17664<-------------------->17665
Next, we can look at the signal strengths in satfinder:
17666<-------------------->17667
The dish is moved back two clicks to the point where lock is lost.
17668<-------------------->17669
The satfinder shows both receivers bouncing from Lock to No Lock and No Signal in the last screen captures. We would think since the Zero 4K would still be showing an usable signal in the end because it was stronger in the beginning. But that is not the case! In the end, neither receiver can produce anything that is usable.
Sure, some receivers will operate and perform better than others. And some receivers can perform a bit better on certain frequencies than others. I have done many reception tests with different fta satellite receivers, and have yet to find one that performed noticeably better than all of the other receivers on marginal signals. Granted, there are some receivers that perform poorly, but a poor performing receiver is usually consistent and performs poorly in other areas too.
Don't pay much attention to what a fta receiver reads in signal strength. Pay attention to the channels you get or don't get. Find out WHY if you have one receiver that is outperforming another receiver by a wide margin under supposedly identical environments or circumstances. Most of our fta receivers should perform pretty much the same in the signal receiving area, providing all things are equal...