Well my TVGOS listings ended this morning at 4 am so I decided to do a reset to factory settings on both of my DTVPal DVRs to clear out any remnants of TVGOS. One of my DVRs is at firmware F201 (original as shipped in December 2008) and the other one is at F208. The F201 firmware has served me very well over the last 4+ years with TVGOS and I'm anxious to see how it behaves with PSIP only.
So far I have noticed a difference in the time accuracy of the two different firmware versions. This could be attributed to how each version calculates and sets the "correct" time. After doing the factory reset and letting each DVR sit in standby mode (green light off) for a few hours I checked the clocks in each DVR against a radio-controlled clock. The F201 was slow by 48 seconds and the F208 was slow by 27 seconds. Not that much of a difference but certainly worth mentioning.
Prior to doing the factory resets this morning the F201 DVR still showed the TVGOS logo in the guide and its clock-setting screen was grayed out. The F208 DVR did not
show the TVGOS logo prior to the reset but its clock setting screen was also grayed out. After the reset both DVRs had the manual clock-setting screen functional and the TVGOS logo had now also disappeared from the F201 DVR.
I did a manual adjustment of the F201 DVR so that it is exact to the second with my radio-controlled clock. I want to see if it drifts and, if so, by how much. For now I'm leaving the F208 alone to see how its "weighted mean" calculation works with PSIP to keep the time consistent. Depending on the results I may update my F201 to F208 but "if it's not broke don't fix it." For all I know F201 may work better for me than F208 does for keeping accurate time at my location.
One interesting difference that I noted in the F201 firmware compared to the F208 firmware is that you can set the "start early" and "end late" times in F201 to a maximum of 60 minutes for each where the F208 only allows for a maximum 5-minute offset for each. I wonder what prompted the programmers to change the range of those user-adjustable settings.