I'm quite pleased with this Hantek 6022BE scope.
I must have used ctrl+prtScn to capture this shot because I appear to have unintentionally included the colour bars I was using as a source on the diminutive extended desktop.
And again without vBulletin's resolution limit
https://www.***********/gp/g3zvt/7vyz03
This will be more than adequate for setting the monostable timings when I get round tuit.