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Science Forum Index » Electronics - Misc Forum » SCART HDTV vs RCA TV power comsumption
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| QuasiCodo |
 Posted: Tue Dec 19, 2006 12:59 pm |
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I'm a software engineering working with a Set Top Box (STB) which has
both SCART HDTV and RCA TV connectors. I think I am having a power
problem with the STB when I connect a wireless NIC into the USB port.
It works great in RCA TV mode, but when I use the SCART HDTV settings,
the STB reboots when the USB device is initialized. I think that there
is a significant power drain in the system when the wireless NIC
initializes the transceiver. I also think that in HDTV mode, the power
drain causes the STB to exceed some critical threshold which causes a
reset. Can anyone point me to the right direction to information about
the power consumption of SCART vs RCA?
Thanks,
((&-> |
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| JeffM |
| Posted: Tue Dec 19, 2006 2:55 pm |
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QuasiCodo wrote:
Quote: . . .
It works great in RCA TV mode, but when I use the SCART HDTV settings,
the STB reboots when the USB device is initialized.
. . .
Can anyone point me to the right direction to information about
the power consumption of SCART vs RCA?
I'm thinking for each of the 5 groups to which you cross-posted this
there are likely 2 that are more apt
http://groups.google.com/groups/search?q=ingroup:rec.video+SCART+RCA+-FS |
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| CWatters |
| Posted: Sat Dec 23, 2006 7:14 am |
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"QuasiCodo" <QuasiCodo@Yahoo.com> wrote in message
news:YTUhh.3452$AY1.2692@bignews5.bellsouth.net...
Quote: I'm a software engineering working with a Set Top Box (STB) which has
both SCART HDTV and RCA TV connectors. I think I am having a power
problem with the STB when I connect a wireless NIC into the USB port.
It works great in RCA TV mode, but when I use the SCART HDTV settings,
the STB reboots when the USB device is initialized. I think that there
is a significant power drain in the system when the wireless NIC
initializes the transceiver. I also think that in HDTV mode, the power
drain causes the STB to exceed some critical threshold which causes a
reset. Can anyone point me to the right direction to information about
the power consumption of SCART vs RCA?
I doubt any such info exists outside the manufacturers design office. The
power consumption of the box may change quite a bit depending on the mode
(regular TV vs HDTV) due to the memory and chip set being worked harder in
HDTV mode. The SCART vs RCA is probably unrelated.
Presumably the wireless USB device is powered by the STB? Try using a
_powered_ USB hub between the STB and the wireless USB device. That should
reduce the load on the STBs power rails. If that works then it might confirm
the source of the problem for you.
It could also be a crude security feature. It's possible they don't want
HDTV content to be broadcast over wireless lans. |
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| Robert Baer |
| Posted: Sat Dec 23, 2006 5:30 pm |
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CWatters wrote:
Quote: "QuasiCodo" <QuasiCodo@Yahoo.com> wrote in message
news:YTUhh.3452$AY1.2692@bignews5.bellsouth.net...
I'm a software engineering working with a Set Top Box (STB) which has
both SCART HDTV and RCA TV connectors. I think I am having a power
problem with the STB when I connect a wireless NIC into the USB port.
It works great in RCA TV mode, but when I use the SCART HDTV settings,
the STB reboots when the USB device is initialized. I think that there
is a significant power drain in the system when the wireless NIC
initializes the transceiver. I also think that in HDTV mode, the power
drain causes the STB to exceed some critical threshold which causes a
reset. Can anyone point me to the right direction to information about
the power consumption of SCART vs RCA?
I doubt any such info exists outside the manufacturers design office. The
power consumption of the box may change quite a bit depending on the mode
(regular TV vs HDTV) due to the memory and chip set being worked harder in
HDTV mode. The SCART vs RCA is probably unrelated.
Presumably the wireless USB device is powered by the STB? Try using a
_powered_ USB hub between the STB and the wireless USB device. That should
reduce the load on the STBs power rails. If that works then it might confirm
the source of the problem for you.
It could also be a crude security feature. It's possible they don't want
HDTV content to be broadcast over wireless lans.
Perhaps the bandwidth needed for HDTV is a lot more than wireless
lans could handle, and the software recognizes that... |
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