The results are in Andrew c120 feedhorn VS smart titanium lnb-f

[sergueiXXX]

Privit serguei

Privet.
I already had success with 1.8m meshed dish and Ku band from this satellite.
I just recently moved couple blocks away and here, by some reason, no luck at all. I suspect LNB a bit as I can not get any signal with it now.
But thanks for suggestions. Of course I will try to find better dish just do not want to spend a fortune on it.

 

[wod]

gbrowne, do you have any other lnbs that you could mod to try on the feed to see if there is a similar result you had with the smart ?

quite interested in this to see if it would make a difference on my 1metre channel master as i have a feedhorn here but didn't use it as people said the signal levels was lower using it.

 

[nelson_b]

gbrowne, do you have any other lnbs that you could mod to try on the feed to see if there is a similar result you had with the smart ?

quite interested in this to see if it would make a difference on my 1metre channel master as i have a feedhorn here but didn't use it as people said the signal levels was lower using it.

hi -- wod --and --gbrowne --
when this winter weather clears off -- and i get the time i,m intending to try this mod using a spare darkgold l.n.b.f. -- i also have a 1 metre channel master --wod-- and have found that the darkgold lnbf easily outperforms an inverto c120 with cm feed on this dish -- as does other lnbf,s that i,v tried --
edision SL5
sharp white case
inverto black ultra
the above 3 lnb, s and the darkgold are to all intents equal in performance on the 1 metre c.m. --- the inverto black ultra just and so has the edge on the very weakest signals .

regards nelson .b .

 

[gbrowne]

Hi Wod,
No, don't have any other 'current' LNBs to try - I got the Smart in specially.
Have various legacy LNBs but not so interested in messing with them as realistically they are unlikely to ever match the Smart's electronics.

I think my next experiment is going to be tweaking the current 'C120 Smart' to make it possible to adjust the reflector spacing at the rear of the waveguide with a fine threaded screw.

The potential problem being that If I go too much further I could end up with an LNB that is peaked to only a narrow part of the band !

G

 

[wod]

hi -- wod --and --gbrowne --
when this winter weather clears off -- and i get the time i,m intending to try this mod using a spare darkgold l.n.b.f. -- i also have a 1 metre channel master --wod-- and have found that the darkgold lnbf easily outperforms an inverto c120 with cm feed on this dish -- as does other lnbf,s that i,v tried --
edision SL5
sharp white case
inverto black ultra
the above 3 lnb, s and the darkgold are to all intents equal in performance on the 1 metre c.m. --- the inverto black ultra just and so has the edge on the very weakest signals .

regards nelson .b .

have you tried the inverto black ultra on the cm1.2 does it make a difference ?

i am looking to buy this lnb to try out on my dishes

 

[nelson_b]

have you tried the inverto black ultra on the cm1.2 does it make a difference ?

i am looking to buy this lnb to try out on my dishes

hi -- no i,v not got round to it -- when i got the 1.2 dish face early this year -- it was too cold to mess about -- so i just put the darkgold back on - as it was already sealed up on the end of the cable -- l.o.l --
inverto black ultra is a good l.n.b -- i must do a comparison -- too many other projects this week --

regards nelson.b

 

[wod]

would be interesting to see how a modded inverto black ultra would do bolted to the feed, maybe that is something to try.

was it just the single inverto black ultra you tried as i'm looking to buy twin or quad and hope these have the same performance as the single

 

[nelson_b]

would be interesting to see how a modded inverto black ultra would do bolted to the feed, maybe that is something to try.

was it just the single inverto black ultra you tried as i'm looking to buy twin or quad and hope these have the same performance as the single

it was a single --

i agree it would be interesting to see how a modded inverto black ultra would do .

and i intend to try sometime - as i have one with the feed cut off - from an experiment on a prime focus dish --

regard nelson.b

 

[wod]

it was a single --

i agree it would be interesting to see how a modded inverto black ultra would do .

and i intend to try sometime - as i have one with the feed cut off - from an experiment on a prime focus dish --

regard nelson.b

when you tried it out did you have to place it closer to the dish or further away ?

on the quad and twin models the neck on the lnb is shorter, than the single which i wonder if will make a difference ?

i hope it will be an improvement as my dish is high up so not easy to access to fiddle about, currently using smart titanium 2nd edition quad lnb.

 

[nelson_b]

i, m sorry i cant remember what the best l.n.b. position was for the inverto black ultra was on that dish --

i didn,t know that the twin and quad were shorter ----

regards nelson.b .

 

[nelson_b]

when you tried it out did you have to place it closer to the dish or further away ?

hi wod
i was playing around with the 1.2 dish yesterday ---the black ultra worked best in a central position on this dish , i found that like some other good l.n.b,s --
getting the skew setting spot on is important for the very weak signals -- it seems very sensitive in this respect -- the rather confused results of yesterdays fun and games are here ---
http://www.satellites.co.uk/forums/...channel-master-120cm-inverto-black-ultra.html

regards nelson.b.

 

[wod]

nelson.b, i've just fitted the black ultra twin lnb to my dish this morning and cant see any outstanding difference over a smart titanium lnb i had on it before.

you mention something about skew settings, what do you mean about this ?

have you got any tps that i should check which are weak in our area ?

12476h 28000 1west is weak here but locking in with a bit of pic breakup on the channel master 90cm I have the lnb on, vantage x221ci receiver

16east some better signals though

 

[Huevos]

nelson.b, i've just fitted the black ultra twin lnb to my dish this morning and cant see any difference over a smart titanium lnb i had on it before.

What test did you do?

 

[wod]

i put my horizon meter on the dish first and the smart with my dish just pointing to 1west 78-79db signal reading, the black ultra was 80-81db so some improvement there.

i just checked channels that was weak before and there is some slight improvements but nothing that stands out.

my meter cant measure single transponder signal levels, so i just gone by the receiver signal bars. i'm going to get a better meter sometime so i can do a proper test as the horizon hdsm is limited to satellite transponder lists by horizon

 

[Huevos]

i put my horizon meter on the dish first and the smart with my dish just pointing to 1west 78-79db signal reading, the black ultra was 80-81db so some improvement there.

I don't know what your meter can read but I wouldn't take any notice of signal level. All that is telling you is the signal level coming out of the LNB after conversion. Turning up the gain of the LNB amplification circuits would give you a higher reading even if there were no difference in input levels. To get some sort of useful data you need to compare signal to noise or better still BER or MER.

If you want to see a direct comparison between the Smart Titanium and the Black Ultra have a look at the spectrum images I attached in post #48 in this thread.

 

[hexah]

Huevos is right, you need to measure the BER.

As I had pointed out, the specifications indicate the Inverto Black Ultra has a higher gain, of up to 5dB more than most LNBs (including the Smart Titanium), so the increase in signal strength that you saw is exactly what is expected.

On the spectrum images, note the non-linearity of the Smart Titanium. This is typical of many LNBs and is intended to compensate for the increased attenuation of the higher frequencies by the cable. Most cables have charts showing the typical attenuation by frequency, search for RG6 for an example.

 

[nelson_b]

nelson.b, i've just fitted the black ultra twin lnb to my dish this morning and cant see any outstanding difference over a smart titanium lnb i had on it before.

you mention something about skew settings, what do you mean about this ?




have you got any tps that i should check which are weak in our area ?

12476h 28000 1west is weak here but locking in with a bit of pic breakup on the channel master 90cm I have the lnb on, vantage x221ci receiver

16east some better signals though

hi --

the transponder you have been using (12476h 28000) is the one i usualy use for setting the1.2 dish up --or 12718 V 18400 is a bit stronger for a smaller dish

regarding skew -- i just noted that the black ulta l.n.b . -- like the darkgold is very sensitive to small adjustments clockwise or anti clockwise of the l.n.b. in its holder -- some l.n.b,s i,v tried can be moved quite a long way from vertical before the signal weakens ---but not these two --
i notice you are experimenting using a 90 c.m. you might see more comparison difference , when you compare them on the 1.2 dish -- the ultra seems to show it abilities better on the larger dishes --- i fancy

regards nelson.b .

 

[wod]

well further checking and the lnb is very good, been checking west side and signals are very good across the range 1-58w, with exceptions of 7w etc

nelson_b, the lnb position is indeed middle i've found best. think i've found the limit for what can receive on this size dish

 

[samoloko]

wod

what Is your current lnb choice
do you use standard Inverto Utra twin only or modified to C120
have you tried single ultra black

 

[wod]

I'm using black ultra twin out of the box on a cm 1.2 no mods to c120 and it works great.