TAS 200 Series Performance Verification
Handheld and Benchtop Instruments Basic Service
13
To check Variable DC balance accuracy, perform the following steps.
1. Set up the oscilloscope as follows:
VERTICAL MODE CH1 (CH2)
CH 1 (CH 2) AC-DC DC
CH 1 (CH 2) GND In
CH 1 (CH 2) VOLTS/DIV 10 mV
2. Verify that the oscilloscope trace shift is less than one division between the
fully clockwise and the fully counterclockwise positions of the CH 1
VARIABLE control.
3. Repeat steps 1 and 2 above for CH 2.
To check CH 2 Inverted balance accuracy, perform the following steps.
1. Set up the oscilloscope as follows:
VERTICAL MODE CH2
CH 2 GND In
2. Position the oscilloscope trace on the center horizontal graticule line using
the CH 2 POSITION control.
3. Verify that there is minimal trace shift (<±1 divisions) on the TAS 200 series
instrument when switching the CH 2 INVERT button in and out.
4. Set the oscilloscope CH 2 INVERT button to the out position.
Variable DC Balance
CH 2 Inverted Balance
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