TM 6800 HD Super+ Tuner/LNB compatibility

[Zorch]

Hi again all,

I wonder if there's anyone on the forum who has experienced this problem/a similar problem...?

I believe that the tuner in the TM 6800 HD Super+ has compatibility issues with C120 LNB's... I am currently using an Inverto Black Pro C120 Single Flange LNB (which it does not like) on a Fibo 120cm x 135cm Dual-Offset Gregorian Antenna. The tuner has exactly the same compatibility issues when I use an Inverto 'White Tech' C120 Single Flange LNB and an Invacom SNF-031 Single Flange LNB on my dish...

The compatibility issue has only been noticeable since using the TM 6800 HD Super+... the receiver constantly struggles with the reception of, and sometimes the ability to lock onto, the very high end transponders on various satellites... although there are a few notable exceptions... i.e. Astra 2A/2B/2D at 28.2°E

The problem frequencies are always around/between 12.200-12.750 and this occurs on Horizontal and Vertical polarities alike. My TM 5400 CI+ USB (SD non-super) has no such problems with those high-end transponders while using the same LNB feed, be it a direct feed or via a loop-through...

My set-up also incorporates an Aston DS 200 'Satseeker' Interface (DiSEqC/36v Convertor) which moves my dish. The main (single) feed from my dish/LNB initially feeds into the Aston DS 200 before being looped through to the TM 6800 HD Super+/TM 5400 CI+ USB. Incidentally, I get exactly the same results if the feed goes straight from the Dish/LNB directly into the TM 6800 HD Super+/TM 5400 CI+ USB and by-passing the Aston DS 200 altogether...

I have always used Technomate (SD) receivers with my set-up over the years and I had no problems whatsoever gaining good reception figures on these 'High End' frequencies until I used the TM 6800 HD Super+... I cannot figure out why this is happening... the best example I can give you to illustrate this problem (using like for like SD frequencies on one single satellite) would have to be on Astra 1L at 19.2°E

N.B.
All the frequencies used (below) are as listed on the KingOfSat website...
Weather conditions were dull and overcast but dry at the time of the test...


Astra 1L at 19.2°E

12.188 H [27500] 3/4 DVB-S [QPSK] 38.0 Mbps [1L Europe Beam]

TM 6800 HD Super+
Signal Strength 93%
Signal Quality 79%

TM 5400 CI+ USB
Signal Strength 93%
Signal Quality 95%

12.226 H [27500] 3/4 DVB-S [QPSK] 38.0 Mbps [1L Europe Beam]

TM 6800 HD Super+
Signal Strength 93%
Signal Quality 78%

TM 5400 CI+ USB
Signal Strength 93%
Signal Quality 95%

12.515 H [22000] 5/6 DVB-S [QPSK] 33.8 Mbps [1L Europe Beam]

TM 6800 HD Super+
Signal Strength 90%
Signal Quality 77%

TM 5400 CI+ USB
Signal Strength 90%
Signal Quality 96%

12.545 H [22000] 5/6 DVB-S [QPSK] 33.8 Mbps [1L Europe Beam]

TM 6800 HD Super+
Signal Strength 90%
Signal Quality 74%

TM 5400 CI+ USB
Signal Strength 89%
Signal Quality 93%

12.610 V [22000] 5/6 DVB-S [QPSK] 33.8 Mbps [1L Europe Beam]

TM 6800 HD Super+
Signal Strength 90%
Signal Quality 78%

TM 5400 CI+ USB
Signal Strength 89%
Signal Quality 97%

12.633 H [22000] 5/6 DVB-S [QPSK] 33.8 Mbps [1L Europe Beam]

TM 6800 HD Super+
Signal Strength 88%
Signal Quality 66%

TM 5400 CI+ USB
Signal Strength 88%
Signal Quality 87%

12.699 V [22000] 5/6 DVB-S [QPSK] 43.0 Mbps [1L Europe Beam]

TM 6800 HD Super+
Signal Strength 84%
Signal Quality 56%

TM 5400 CI+ USB
Signal Strength 87%
Signal Quality 92%

12.722 H [22000] 5/6 DVB-S [QPSK] 33.8 Mbps [1L Europe Beam]

TM 6800 HD Super+
Signal Strength 83%
Signal Quality 45%

TM 5400 CI+ USB
Signal Strength 87%
Signal Quality 87%

12.728 V [22000] 5/6 DVB-S [QPSK] 33.8 Mbps [1L Europe Beam]

TM 6800 HD Super+
Signal Strength 85%
Signal Quality 68%

TM 5400 CI+ USB
Signal Strength 87%
Signal Quality 97%


N.B.
When I use the TM 6800 HD Super+ I have to alter frequencies 12.699V, 12.722H and 12.728V to achieve better reception/enable the receiver to fully lock onto the signal... one frequency alteration is quite a sizable one... but the other two alterations are only minor ones... but they also have a marked effect on reception... the altered frequencies (listed below) show the before and after results to the frequency alterations...


12.700 V [22000] 5/6 DVB-S [QPSK] 43.0 Mbps [1L Europe Beam]

TM 6800 HD Super+ (before frequency alteration 12.699V)
Signal Strength 84%
Signal Quality 56%

TM 6800 HD Super+ (after frequency alteration 12.700V)
Signal Strength 87%
Signal Quality 69%

12.712 H [22000] 5/6 DVB-S [QPSK] 33.8 Mbps [1L Europe Beam]

TM 6800 HD Super+ (before frequency alteration 12.722H)
Signal Strength 83%
Signal Quality 45% [NO SIGNAL LOCK]

TM 6800 HD Super+ (after frequency alteration 12.712H)
Signal Strength 85%
Signal Quality 60%

12.724 V [22000] 5/6 DVB-S [QPSK] 33.8 Mbps [1L Europe Beam]

TM 6800 HD Super+ (before frequency alteration 12.728V)
Signal Strength 85%
Signal Quality 66%

TM 6800 HD Super+ (after frequency alteration 12.724V)
Signal Strength 86%
Signal Quality 74%


I appreciate that using these reception figures as a comparison between two different Technomate receivers (one SD and the other HD) is not an exact science... but as you can see by the results above... the difference in 'Signal Strength' on these high-end transponder frequencies between the two receivers is negligible... they are very comparable... but the difference in 'Signal Quality' between the two receivers is quite alarming...

The receiver was sent to Technomate (quite a while ago now) and they tested it on their own Dish/LNB (not a C120 LNB however) and they found no problems at all obtaining good reception/locking onto the high end transponders on the TM 6800 HD Super+ ...they reported good Signal Strength/Signal Quality on all high-end transponder frequencies across a number of satellites... including Astra 1L at 19.2°E

I have thought about trying out an Inverto Black Ultra which has had the flange conversion done... but I don't know where to get one from...? Has anyone on the forum fitted one of these converted Black Ultra LNB's onto a Fibo Dish without changing the Fibo feed horn...?

So, in conclusion, is this compatibility issue solely down to the tuner in the TM 6800 HD Super+ not liking C120 LNB's...? Is the solution as simple as swapping over to a converted 40mm 'Universal' LNB...?

I would appreciate any suggestions guys...

P.S.
Oh, and by the way, thank you so much for taking the time to read through all of my inane drivel... oc:

Best Wishes,
Zorch

 

[kefran]

Hi Zorch,
I have somewhat the same problem with another satellite receiver. Did you find an issue to this problem ? By changing the C120 LNB into a 40mm LNB ?
Thank you for your help.
Frank

 

[Zorch]

Hi kefran,

I should have updated this thread a long time ago... sorry...

Nearly all of the compatibility issues I mentioned in my original post have been resolved... I now have much much better compatibility between C120 LNB and Technomate tuner... it's still not perfect though...

The way I resolved the compatibility issues was simple... by not using the TM 6800 HD :rip:

I replaced it with a TM 5402 HD

Q/ Which receiver and LNB combination are you having compatibility issues with...?

Best Wishes,
Zorch

 

[kefran]

Hi,

Thanks for the answer. I have an official satellite receiver from Canal Plus (french). The LNB is an Invacom Quad (0.3db). And it seems that on the exact same frequencies I have the same problem. I tried this configuration in several dish sizes (80cm, 1.20m, 2.40m and 4.30m) and the problem remains the same.

Did you try to change the C120 Feed ?

Best regards,

Frank

 

[Zorch]

Hi again kefran,

I have an official satellite receiver from Canal Plus (french).

Perhaps this Canal Plus receiver has the same tuner as the TM 6800 HD...?

Did you try to change the C120 Feed ?

As I said in my original post...

I have thought about trying out an Inverto Black Ultra which has had the flange conversion done...

I would still like to try this out... but I really don't want to change the original Fibo feedhorn...

Could you not use another receiver... or do you have to use the official Canal Plus receiver because you have a sub... and the receiver and card are married...?


Best Wishes,
Zorch

 

[kefran]

Hi again Zorch,

We tried today with a professional satellite spectrum analyzer (TV EXPLORER HD+) and it seems to be the same on all frequencies with a 4.30m prime focus satellite dish...

It doesn't seem to be a problem with the receiver then.

I will try to change the feedhorn (only) from an Invacom C120 feedhorn to a Gilbertini C120 feedhorn and also make a test with a basic universal LNBF (40mm).

And i'll let u know...

Best regards,

Frank