Since this thread remains off topic, I'll interject a few comments. I consider myself one of the 20% like.no.other mentioned.
The 970, along with the Sony CRTs dating back to the XBR800 are all built upon the DA4 chassis. It is written on the rear label of the set.
The DA4 accepts 480i, 480p, 720p and 1080i inputs. They are all processed in one way or another. A very good discussion of this can be found here.
There is a bit of clutter in the thread, but if you wade through it there is much to be learned. A number of the accepted CRT experts in AVSForum were involved in the thread and the players came to a general consensus on the subject.
The bottom line is that the DA4 chassis operates at a fixed scan rate for display
. This scan rate is equivalent to 1080i/540p. All of the Sony technical documentation presented indicates that all input resolutions are eventually upconverted to 1080i for display
. Kentech believes the DA4 can also scan at 540p due to his visual checks indicating that when DRC progressive is selected and/or a 480p input is displayed there is no indication of interlaced artifacts. I plan to check this theory by direct measurement of the vertical scan frequency while selecting the DRC options and changing input resolutions.
Note that a 1080i/540p display
does not discount the 960i or 480p indications on the set during operation. The 960i or 480p repesents the output of the DRC. Further processing is done prior to display
Horizontal resolution in CRTs is a difficult thing to quantify. A CRT scans with an analog trace and can't be directly compared to digital displays and pixel count. However, it is a fact that the XBR960 and XS955 with the SFP tube have a much higher horizontal resolution than the other members of the DA4 chassis family.