[Cin] I found some test patterns (clips) ...

[Andrew Randrianasulu]

http://www.gvgdevelopers.com/concrete/products/k2/test_clips/

in particular I look at 

http://www.gvgdevelopers.com/K2DevGuide/Clips2/NTSC_SD_DVCAM_colorbar.mov

interestingly this one says:

Video
ID                                       : 1
Format                                   : DV
Codec ID                                 : dvc
Duration                                 : 10 s 10 ms
Bit rate mode                            : Constant
Bit rate                                 : 24.4 Mb/s
Width                                    : 720 pixels
Clean aperture width                     : 704 pixels
Height                                   : 480 pixels
Clean aperture height                    : 480 pixels
Display aspect ratio                     : 4:3
Original display aspect ratio            : 4:3
Clean aperture display aspect ratio      : 4:3
Frame rate mode                          : Constant
Frame rate                               : 29.970 (29970/1000) FPS
Standard                                 : NTSC
Color space                              : YUV
Chroma subsampling                       : 4:1:1
Bit depth                                : 8 bits
Scan type                                : Interlaced
Scan type, store method                  : Interleaved fields
Scan order                               : Top Field First
Original scan order                      : Bottom Field First
Compression mode                         : Lossy
Bits/(Pixel*Frame)                       : 2.357
Stream size                              : 29.1 MiB (59%)
Language                                 : English
Color primaries                          : BT.601 NTSC
Transfer characteristics                 : BT.709
Matrix coefficients                      : BT.601



this moving square with color bars and timecode seems to be good for spotting interlacing ...

Other sources, I only looked at few of them, not found anything interlace related:

https://www.w6rz.net/