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TBS5520 Multi-standard TV Tuner USB Box power draw

Pentru testarea curentului necesar pe portul USB am folosit doua module KEWEISI 3V-9V 0-3A USB Power Detector
Tunerul TBS 5520 se livreaza impreuna cu un cablu USB Y pentru a face fata consumului pe partea de DVB-S2.


Puterea consumata in idle cu tunerul setat in modul DVB-T/T2

Puterea consumata cu receptie DVB-T/T2.

In cazul TBS5520 posibile probleme, neconfirmate inca, pot aparea cu puterea livrata LNB-urilor in cazul cablurilor lungi, de proasta calitate sau a LNB-urilor high gain/PLL ce au un consum mai ridicat de curent. In acest caz instalatia de test, unde nu au fost observate probleme, este formata din ~40m de cablu end-to-end, Amiko DM3800 H-H Power Consumption: 50mA (Stand-by), 200mA (Normal), 350mA (Max.) switch S8/1PCP-W2 cu 60 mA (18 V) si Single HGLN 40mm LNB ce consuma ~120 mA Max. @ 11 ~ 20V.


Deci am un consum de maxim de 348mA = 238mA pe cablu + 50mA din HH + 60mA din diseqc fara a misca motorul.
Puterea consumata in idle cu tunerul setat in modul DVB-S-S2

Puterea consumata cu receptie DVB-S/S2 in polarizare orizontala.
Puterea consumata cu receptie DVB-S/S2 in polarizare verticala.


Masuratorile de power au fost realizate pe desktop. Utilizarea acestui tuner impreuna cu un laptop a decurs fara probleme in DVB-T2/S2, mai putin si testul cu modulele KEWEISI in modul DVB-S2 unde laptopul refuza o conexiune pe portul USB cu acest tuner (probabil din cauza cererii prea mare de curent).

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