The Hanteks are pretty nice scopes for the price. I got a 5102P 100MHz 2 Channel at Banggood a few months ago. It's my first scope and I am still learning so I don't feel comfortable offering advice on it's use just yet. It is a nice scope though. It was $229 with free shipping from their US warehouse, arrived in about a week. They still have it for the same price, but have added $2.99 for shipping from US warehouse, or If you want to wait for the added shipping time, it's $209 + $1.20 shipping from China.
Santa delivered a 5102P to forum member Rod Stewart this Christmas and he just posted some info on testing a TIU here: TIU Output Signal Patterns Using a Hantek Scope w/Screenshots. He's more experienced with scopes than I am and he likes it. He also added some very helpful and detailed notes on the process he used to test the TIU, which is worth a look no matter which scope you end up with.
Also, Gunrunnerjohn got a Mustool (MDS8207 I think it was?) portable handheld scope to do just what you are wanting to do. He posted about it with info around here somewhere. I believe it was less than $100 (maybe even like $80-$90 or so?). Maybe he will be along to comment on that one and how he likes it so far (and also provide the correct version if I got that wrong).
Then there is the TIU Port Tester that indicates Good, Weak or Bad DCS signal for the TIU channel being tested. It was developed right here on the OGR Forum by Adrian!, Gunrunnerjohn, and Stan2004 and is available in kit form. Thread here: Design of a $10-20 DCS-TIU Port Tester Tool? Info about the kit is included in the thread.
