Hay Mael
I swear I did write a reply much earlier but it seems that I made a mistake while ‎submitting it. Any way, I can see you received many replies so I will try to add some info ‎that I hope it will be helpful to you as I'm not very good my self in using scopes.‎
I believe your new scope has to be an analog one which is good but will show you the ‎shape of the wave and you will have to make calculations to get the data you need, SM ‎mentioned youtube links which will help to know how.‎
You can buy the manual for your scope from this link:
http://www.telford-‎electronics.co.uk/manual.php?alpha=I
Or you can first try to contact the manufacturer first to see if they can provide you with ‎the manual, it is a Japanese company and according to my experience with another ‎Japanese manufacturer, Japanese companies never stop helping their customers if they ‎can even if the product is discontinued. Their data is:‎
International Sales Dept., Test Instruments Group
‎7-41, Kugayama 1-Chome, Suginami-ku, Tokyo, 168-8501 Japan‎
TEL : +81-3-5370-5483‎
FAX : +81-3-5370-5230‎
E-mail:info-tme@iwatsu.co.jp ‎
It is nice to have a scope, it will enable you to measure the signal of your projects and ‎have exact data about them instead of guessing.‎
I hope the above would be of any help
Best of luck my friend