Franky_D
26-05-2013, 09:59 PM
I decided to perform this test to mainly answer the question if matching feed horn provides any added value on a 1.2 Channel Master dish. Location: Copenhagen, Denmark.
For this matter I compared:
- Invacom SNH-031 (LNBf) vs SNF-031 (flange C120); and
- Inverto Black Pro LNBf 0.2 dB vs Inverto Black flange C120.
Although SNH-031 and SNF-031 should be in principle the same LNB with the exception of the wave guide part, the tested SNH-031 happened to be a bit more successful one – overall approx 5 dB higher gain and lower noise. See attached certificates with test results for these specific LNBs (came in the boxes with them).
In addition few more LNBs were put to test, including few professional ones.
I used two different satellites for benchmarking to have more objective results:
- 36E (Eutelsat 4W and Eutelsat 7W);
- 28.2E (Astra 2F and 1N).
Just to make it more interesting I was testing both linear and circular signal reception.
As a result of the test:
- Matching feed horn proved to provide improvement in the signal quality on the 1.2 Channel Master dish.
- Difference in signal quality between SNH-031 and SNF-031 was less on stronger transponders, but was more pronounced on weaker transponders.
- Do***ented here test was performed on a sunny day. Few smaller tests were performed on cloudy days and difference in signal quality with feed horn was getting only bigger.
- Invacom SNF-031 with feed horn outperformed others in the range 11.7-12.7 both linear and circular polarization signals (even though the tested one was not one of the best batches)
- Moded Smart and Octagon performed best of all in 10.7-11.7 GHz linear polarization. Octagon remained also generally strong in 11.7-12.7 GHz (considering it’s price – not bad at all! );
- NJR and SMW LNBs were not impressive performers. Either they are meant for other purposes (data transmission purposes, etc), or their noise of 1dB is too high compared to others (others than do not cheat by putting 0.3 dB on their LNBs?)
Special thanks to cosworth4x4 for providing moded Smart Titanium and Octagon LNBs for the test! :)
For this matter I compared:
- Invacom SNH-031 (LNBf) vs SNF-031 (flange C120); and
- Inverto Black Pro LNBf 0.2 dB vs Inverto Black flange C120.
Although SNH-031 and SNF-031 should be in principle the same LNB with the exception of the wave guide part, the tested SNH-031 happened to be a bit more successful one – overall approx 5 dB higher gain and lower noise. See attached certificates with test results for these specific LNBs (came in the boxes with them).
In addition few more LNBs were put to test, including few professional ones.
I used two different satellites for benchmarking to have more objective results:
- 36E (Eutelsat 4W and Eutelsat 7W);
- 28.2E (Astra 2F and 1N).
Just to make it more interesting I was testing both linear and circular signal reception.
As a result of the test:
- Matching feed horn proved to provide improvement in the signal quality on the 1.2 Channel Master dish.
- Difference in signal quality between SNH-031 and SNF-031 was less on stronger transponders, but was more pronounced on weaker transponders.
- Do***ented here test was performed on a sunny day. Few smaller tests were performed on cloudy days and difference in signal quality with feed horn was getting only bigger.
- Invacom SNF-031 with feed horn outperformed others in the range 11.7-12.7 both linear and circular polarization signals (even though the tested one was not one of the best batches)
- Moded Smart and Octagon performed best of all in 10.7-11.7 GHz linear polarization. Octagon remained also generally strong in 11.7-12.7 GHz (considering it’s price – not bad at all! );
- NJR and SMW LNBs were not impressive performers. Either they are meant for other purposes (data transmission purposes, etc), or their noise of 1dB is too high compared to others (others than do not cheat by putting 0.3 dB on their LNBs?)
Special thanks to cosworth4x4 for providing moded Smart Titanium and Octagon LNBs for the test! :)