After a problem with D/A adjustment now solved i come with a new problem:
When doing MG adjustment
A)i'm not able to get a larger vpp than 0,780v.
B)and
in the second step, at max speed the frequency is really slower than
50hz with VR5 all the way up. It is almost the same using others LM13700
that i had.
Should i change some resistance values? If yes, should i increase or decrease resistor values to get a faster MG speed?
or maybe there is a fault on the board?