Advice needed please

[Trust]

Right now overhere at 4.183 LHC 11 dB
The lowest signal with picture 3.649 R TV Genesis 5.0 dB
F16 / CM 1.8 m , X-1 C lnb with stubs polarizer , not free sight in 40.5 W direction

 

[Channel Hopper]

Put the new Zinwell LNB on the dish today and set the skew so the F connector was at roughly 7 o'clock

Connected up the new V8 sat finder and had a play for 20 minutes till the heavens opened

No joy not a sniff.

I am now thinking long term if both C band LNB's are fine I will go back to the original configuration I had and put the LNB's side on @ both sides of the KU

I stuck the Zinwell on the analyser before posting,the background noise was there and altered slightly with a dirty hand stuck in front. No time to reassemble the 1.8 on the roof otherwise I would have given it the full test.

 

[gap30]

I stuck the Zinwell on the analyser before posting,the background noise was there and altered slightly with a dirty hand stuck in front. No time to reassemble the 1.8 on the roof otherwise I would have given it the full test.

no accusations from me lol
just have to get a flicker then hopefully it will all fall into place
its just a bitch to work on

 

[Channel Hopper]

no accusations from me lol
just have to get a flicker then hopefully it will all fall into place
its just a bitch to work on

I wouldn't recommend climbing the ladder for the next hour.

 

[moonbase]

gap30,

The strongest transponder I get from 40.5W with a 1.5m dish is 3682 L, SR3030. With a Technomate TM-5402 (M3) receiver I get 10.3db / 74% signal level using a Titanium LNB fitted with dielectric plate. As you are using the same size of dish you should be able to lock this signal if your dish alignment is OK.

One possible point to note is that the feed opening on the LNB may need to be closer to the dish compared to that of a Ku band LNB. This is the case for a prime focus dish but as I do not use offset dishes I am not up to speed with their focal length adjustments required for different frequency bands. For the 1.5m prime focus dish I use, the Ku band feed is ~4mm inside the focal length of the dish and the C band feed is ~11mm inside the focal length of the dish.

Lastly, to increase your chances of finding a C band signal it might be useful to try only for QPSK modulated signals. The 8PSK modulated signals require a higher signal level to achieve a lock on a satellite receiver.


Rgds

 

[John]

... @gap30, need to clarify summat here as my aging brain is going fuzzy. Are you still using the CM 1.2 to do the Cband experiments on ?, in your initial thread post pics i see a CM1.2 on the black wall mount mast, but also pics of a 1.2 Gibby & a 1.5Gibby. I was under the impression that you were still using the CM 1.2 for the time being - put me right chap lol.

 

[gap30]

No we are definitely using the 1.5 Gibby, the CM now has a new home at my father in laws house

Waiting for this wind to bugger off to really have a few hours on this

Would anyone be so kind to confirm my settings are correct in the V8 see post #98

Just taken delivery of a TBS6903 so could in theory dedicate my TBS5520se to C band or vice versa

 

[moonbase]

...Would anyone be so kind to confirm my settings are correct in the V8 see post #98...

gap30,

I have checked the Technomate TM-5402 (M3) settings for my Titanium LNB and I have two settings different to yours.

LNB Power =ON
22KHz = OFF

I am not sure if the LNB power and 22KHz tone are critical?

Lastly, are you doing a manual search for C Band by setting up a single transponder then trying to get a signal? An alternative way would be to setup the dish and LNB then simply do a full C band blind scan with your satellite receiver. It might catch something for you to work on?


Rgds

 

[John]

Ahh Ok, thanks for the clarification.
Is it possible to set the meter to output 18volts for the lnb instead of the "Auto" setting & can you set the FEC manually to 3/4 ?.
Also, correct me if i'm wrong again, but has this meter not got a spectrum display ?.

 

[gap30]

gap30,

I have checked the Technomate TM-5402 (M3) settings for my Titanium LNB and I have two settings different to yours.

LNB Power =ON
22KHz = OFF

I am not sure if the LNB power and 22KHz tone are critical?

Lastly, are you doing a manual search for C Band by setting up a single transponder then trying to get a signal? An alternative way would be to setup the dish and LNB then simply do a full C band blind scan with your satellite receiver. It might catch something for you to work on?


Rgds

LNB Power options are auto, 13v, 18v in the V8

I think I have worked out how to get the diseqc switch working using 'commited' commnad so I am going to connect it up possibly tonight if I get a minute then have a play with the new 6903

I noticed if I change the polarity to 'V' the 13/18v neon would change from green to red on the V8

 

[gap30]

Just spent the best part of an hour trying to tune signals on tvge international on 5e/3.1e

https://www.lyngsat.com/tvchannels/gq/TVGE-Internacional.html

So signals are off the richter scale on 6903 with the KU on 4.9e (I am guessing 5e is there or thereabouts)

Nothing on the V8 meter/6903 with the C

I know I was advised to start at 20e but its too awkward to work on at that position



meh lol, plus the garage just rang me to inform they cannot find the coolant leak on my Vito having pressure tested it for an hour

Spoon whittling is calling me

 

[moonbase]

Just spent the best part of an hour trying to tune signals on tvge international on 5e/3.1e
https://www.lyngsat.com/tvchannels/gq/TVGE-Internacional.html
So signals are off the richter scale on 6903 with the KU on 4.9e (I am guessing 5e is there or thereabouts)
Nothing on the V8 meter/6903 with the C
I know I was advised to start at 20e but its too awkward to work on at that position

meh lol, plus the garage just rang me to inform they cannot find the coolant leak on my Vito having pressure tested it for an hour
Spoon whittling is calling me

gap30,

Your C band LNB located above the Ku Band LNB looks to be too far back to me. I would expect the LNB feed opening for a C band LNB to be approximately 7mm closer to the dish than the LNB feed opening of a Ku Band LNB. After 6 pages of discussion and over 100 replies, you are still without a C band signal. It would seem to indicate that there is something intrinsically wrong with your setup for C band reception.

As a last resort, it might be worth checking for a dual band satellite that contains both C band and Ku band where both bands are within the scope of your 1.5m dish. Peak the dish on a low level Ku band signal using the Ku band LNB at the correct focal position. Remove the Ku band LNB and replace it with the C band LNB and blind scan the full C band frequency range with either EBS Pro or a satellite receiver. It might also be worthwhile to try some scans without the C band hooded scalar?

The EBS Pro v16 software is free of charge and is a good tool to use with something like a TBS6903 card.


Rgds

 

[scopus]

Gap30,

You are adjusting the elevation of the dish upwards to bring the C Band LNB into focus? Just as if you had the C Band LNB either side of the Ku you would need to move the dish either E or W to bring it into focus depending which side you had the C Band LNB on of course.

 

[gap30]

Gap30,

You are adjusting the elevation of the dish upwards to bring the C Band LNB into focus? Just as if you had the C Band LNB either side of the Ku you would need to move the dish either E or W to bring it into focus depending which side you had the C Band LNB on of course.

No not adjusting elevation up/down - just a few clicks east/west

I did have a play with elevation on the previous LNB....

 

[aceb]

gap30,
Your C band LNB located above the Ku Band LNB looks to be too far back to me.
checking for a dual band satellite that contains both C band and Ku band where both bands are within the scope of your 1.5m dish.

5W would be one such bird, easy catch on both bands using a 1.2M. The C-Band LNB looks to me like it's looking too high up the dish although at this point I'd go back to basics and put the Zinwell at focus to stand the best chance of finding something to prove it all works.

Edited to add... and make sure the plate is inserted correctly.

 

[gap30]

5W would be one such bird, easy catch on both bands using a 1.2M. The C-Band LNB looks to me like it's looking too high up the dish although at this point I'd go back to basics and put the Zinwell at focus to stand the best chance of finding something to prove it all works.

Edited to add... and make sure the plate is inserted correctly.

Well if you look earlier in the thread I originally had it side on to the Ku (which is my preferred method) but was advised it would perform better above the Ku

See post #37 picture 4

I have no doubt it works, I am even thinking the original LNB may work, it is user error

I have obviously under estimated how to focus C band BUT expected to find some signals even if weak

 

[scopus]

No not adjusting elevation up/down - just a few clicks east/west

I did have a play with elevation on the previous LNB....

Right, I think this could be the problem, with the C band LNB sitting above your Ku LNB you will need to lift up the dish to bring the C Band into focus, so go to 19E ku then nudge the dish a little to the east, then lift the dish upwards with you elevation jack which will then bring the C Band LNB into focus. i had the same arrangement on my Channel Master 1.8 before I had the changer.

 

[gap30]

Right, I think this could be the problem, with the C band LNB sitting above your Ku LNB you will need to lift up the dish to bring the C Band into focus, so go to 19E ku then nudge the dish a little to the east, then lift the dish upwards with you elevation jack which will then bring the C Band LNB into focus. i had the same arrangement on my Channel Master 1.8 before I had the changer.

Ok will do and thanks

 

[scopus]

Ok will do and thanks

Good luck! Remember to use you Freesat meter with a transponder from 20 E programmed in...

 

[Trust]

5W would be one such bird, easy catch on both bands using a 1.2M. The C-Band LNB looks to me like it's looking too high up the dish although at this point I'd go back to basics and put the Zinwell at focus to stand the best chance of finding something to prove it all works.

Edited to add... and make sure the plate is inserted correctly.

Since 20º E is difficult for @gap30
5 West !! My thought too , i was already searching at that bird , 3648 RH (V) 2169 TELE SAHEL is coming in very strong 16.1 dB ( Channelmaster 1.8)
But even with changing polarity to LH (H) still 6.3 dB
So even without the DE plate in , he must get it .