Dusky Control - Sky digibox power usage
Power usage for Sky digiboxes
This page documents various measurements I've made on the power used by
various sky digiboxes in various states.
on: 0.12 A
off: 0.11 A
|Grundig GDS3000||2.81||4E0503||0034923662||1.2S4FH||3.5.3||on: 0.10 A
off: 0.09 A
|Pace BSKYB 2500S5||1.2.42||9F0702||0037670161||1.2S4FJ||3.7.6||on: 0.07 A
on: 0.08 A (with viewing card)
off: 0.07 A (with & without viewing card)
|Thomson sky+ DSI 8210CS||127k148||4E2104||0147262869||1.31B03||5.02.f||on: 0.16 A
off: 0.15 A (harddisc still running)
off: 0.09 A (harddisc spun down)
|Pace sky+ BSKYB 3100(1)||6.001||9F2101||0070297771||1.31B06||5.04.d||on: 0.15 AMP
on: 0.16 AMP (with viewing card)
off: 0.14 AMP (harddisc still running)
harddisc would not spin down
The figures are unfortunately a little imprecise due to the equipment used to do the monitoring.
(1) non-standard harddisc fitted: maxtor diamondmax plus9 160GB
For the standard digiboxes, the saving from going into standy is fairly low, saving less than 10% of the usage. In fact, the variance between the Pace (which was the newest of the boxes under test) and the other models shows that the design or components are a big factor.
The small saving is not entirely unexpected, it is well down that the digibox continues to decode data from the satellite in standby. There are at least three reasons for this:
In addition, the digibox continues to supply power to both the LNB and the RF2 output (the latter so the box can be powered on from a remote tvlink).
It's unfortunate that the Pace Sky+ box would not spin down it's hard disc. This may have been due to the non-standard harddisc, however I believe at least one of the previous firmware versions did spindown the disc. The saving for the sky+ does appear to be more significant, reducing power usage by 43% in the case of the Thomson.