Originally Posted by SirCrow
What's the current situation with auto-setting the time thru TV channels? Can I hope to actually have an accurate clock in my DVR+?
I don't believe that we know exactly how the DVR+ determines the current date and time when in Auto mode, but I assume if there is an Internet connection that it acquires those data periodically from an NTP server
. If no internet, then it extracts the clock from the PSIP
data of an available channel, and clock data usually varies from channel to channel. Which channel's PSIP is used I couldn't say as the DVR+ does not ask for one, but it might whichever channel is current.
My DVR+, running 134R, is almost always connected to the Internet via a WiFi connection, with both "Auto Time & Date" and "Auto Apply Daylight Savings" set. While I rarely check the clock, every time I've checked, including a few minutes ago, the date and time agrees with my atomic clocks to within a second or two. Although the DVR+ gets rebooted now and then, I do not reboot it on a regular basis, so I'd say rebooting is not important for an accurate clock when connected to the Internet.
Greasemonkey's report is based upon pure PSIP (no Internet), and varies up to 15 seconds, likely because of which channel is used on a particular day to acquire data. I cannot explain why pilotart isn't seeing time fluctuations on his DVD/DVR using PSIP data, other than the channel being used for the clock in his geographic area is providing really good clock data.