Hi TIN,

here the long story:

http://www.eevblog.com/forum/testgear/tek-ths720a-portable-scope-teardowndiscussion/

and I am trying to pul up the FW:

http://www.eevblog.com/forum/testgear/tek-ths720a-portable-scope-teardowndiscussion/msg1093269/#msg1093269

Zucca