DM 900 UHD Tuning Failed Issue

Good day friends ,

I'm using Dreambox DM900 UHD 4K 1xDVB-S2 Dual Tuner E2 Linux PVR Receiver, with dreamelite 6.0 Image. My tuner configuration is set for reception from 4 orbital sat. which are

Hotbird 13, Astra 19.2, Astra 23 and astra 28 . with a single qautro LNB faced to astra 19 without motor.

configuration on diseqc is as follows

Tuner A

Simple

diseqc A/B/C/D

tuner b inactive

I could pick more than 3000 channels. but the issue is that some channels when tuned , i will received the message on my screen Tunning Failed with the SNR =0 and some with SNR ON 70%.

Please if someone here has an idea on what is wrong with my STB configuration or could help on solving this issue .

you are highly appreciated .

Vix33

Quote from jokosat

u need 4 lnbs with the appropriate bracket , not single lnb

jokosat , abu baniaz and the rest of the guys who have contributed their opinion here , to you guyz I said thank you. below is the attachment of the dish and LNB in question , it's not single LNB but quatro LNB in a single Form. indeed i do get many channels from these 4 orbital satellites . but my dish faced astra 19.2 and it's fixed according to mounting descriptions. I have all channels on astra 19.2 , many from from other 3 but some when tuned , i got the message tuning failed and the SNR will be null , meaning no signal or short signal. i don't know exactly whether it's from my configuration or the size of the dish. Thanks once again for the contribution.

jokosat , you have the complete info. the dish is 45 cm exactly as the one on your link above and the LNB is the same as this on the given link https://www.technisat.com/en_X…-24TN-LNB/352-2749-11116/

I have ordered for a compatible 85 cm dish to experiment with that also , may be due to small size dish , I'm missing some tps.

Thanks for your help.