5
3.1
Offset Adjustment:
a.
Referring to Fig. 8, connect both input lines together.
b.
Connect output BNC connector to a DMM.
c.
Put SW1 at attenuation 1/10.
d.
Adjust VR2 to make output voltage approach to zero as small as possible.
e.
Put SW1 at attenuation 1/100.
f.
Adjust VR4 to make output voltage approach to zero as small as possible.
g.
Repeat “c” to “g” steps until output voltage is always within
±
5 mV at either “e” or “g” step.
Fig. 8
