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Hardware Support Discussions related to using various hardware setups with SageTV products. Anything relating to capture cards, remotes, infrared receivers/transmitters, system compatibility or other hardware related problems or suggestions should be posted here.

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Old 07-27-2009, 01:06 PM
DMT DMT is offline
Sage Advanced User
Join Date: Jun 2009
Posts: 94
Firewire channel changing speed vs. USB-UIRT w/HD PVR

Currently using USB-UIRT to change channels on SA STB's including 1 HD PVR. USB-UIRT has been flawless except 13 seconds to change channels on HD PVR

Before I embark on the scary but very helpful firewire channel change post(s) is there a real speed advantage? Last one I read said 7 seconds with SA boxes and HD PVR. Better than 13 seconds but not great.

I pose the question because I am adding another HD PVR and sometimes like to watch live TV and jump around a bit in the guide. Not often but trying to determine if it is worth (real speed advanage) it going firewire.

SageTV 7.1.9 on Win 7 Ultimate x86; Intel DH67CF, i3-2100T, 4GB DDR3, 60GB SSD, 8TB Drive Bender storage pool, blu-ray. 2x HD PVR (SA 4250HD firewire channel change), 2x HD200 extenders (external IR receiver mod, HD300 remotes).
Plugins: Custom Main Menu, Enable/Disable Favorites, Stock Manager, Web Interface, Mobile Web Interface, PlayOn
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Old 07-27-2009, 02:46 PM
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stanger89 stanger89 is offline
Join Date: May 2003
Location: Marion, IA
Posts: 15,188
I think the biggest delay with the HDPVR is the HDPVR and the delays necessary for it to be happy, like the 4 second delay for the input signal to stabilize before Sage tries to start an actual capture.
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Old 07-27-2009, 02:59 PM
Chriscic Chriscic is offline
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Join Date: Apr 2008
Posts: 729
Stanger nailed it. The USB-UIRT changes channels quickly; it's the HD-PVR stream that takes a long time to kick in (and Sage has some extra delay built in I believe so thing don't blow up)... there was plenty of that back in the day before the delay was built-in.
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