Apple video bandwidth question

[MdntTrain <js@cimmeri.com>]

For Apple II Hires 280x192 monochrome video, isn't the monitor
bandwidth needed 3.59mhz with a dot clock of ~7mhz?

I thought we'd posted here some time ago that dot clock was twice the
bandwidth requirement, but I was reading in a Sencore computer monitor
analyzer manual today that to calculate a monitor's bandwith, you do
the following:

Example for Apple:
horiz scan = 15.7khz
total scan time = 1/15.7khz = 63.69us
active video time = 40/65 * 63.69us = 39.19us
display time per pixel = 39.19us / 280 pixels = 0.14us
bandwidth required for single pixel = 1/0.14us = 7.144 MHZ.

Yes, the dots would surely need to be clocked out at 7.144mhz, but
something seems wrong with their method as it doesn't to take into
account half cycles.

Or does dot clock equal bandwidth?  I just forgot! lol.

 jS