TAS 200 Series Performance Verification
14
Bench Test Instruments and Handheld Oscilloscopes Basic Service
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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