some defects of TBS2000 series:
1. The "ink saving" function,an helpful function for waveform saving and printing,is in no use;
2.no switch between frequency(Hz) and period(s) with "cursor" function;
3.the max. value of offset,when set 500&1/DIV.,can only be 8/DIV(while others can be 10/DIV);
4.the max. value of voltage,with x10 volt. probe,can be only 50V/DIV,While,others can be up to 100/DIV,this makes the max volt. measuring value can only be 190Vac,while,others can be over 300Vac;
5.the last time,measuring value is disappeared,when power on,next time.which brings more inconvenience.
So much for this,if more,will be added next time.