TAS 200 Series Adjustment Procedures
36
Bench Test Instruments and Handheld Oscilloscopes Basic Service
9. Connect the probe to the square wave generator and confirm that the output
is a 1 kHz square wave. Adjust the generator output to produce a waveform
five divisions in amplitude on the display. Adjust the probe compensation to
flatten and optimize the waveform.
10. Set the CH 1 (CH 2) VOLTS/DIV control to 0.1 V.
11. Readjust the generator output to produce a waveform five divisions in
amplitude.
12. Adjust VC 101 (VC201) to flatten the waveform. See Figure 10 for the
adjustment locations.
13. Set the CH 1 (CH 2) VOLTS/DIV control to 1 V.
14. Readjust the generator output to produce a waveform five divisions in
amplitude.
15. Adjust VC 103 (VC203) to flatten the waveform. See Figure 10 for the
adjustment locations.
16. For each setting of the C H 1 (CH 2) VOLTS/DIV control, adjust the
generator output to produce a waveform five divisions in amplitude.
Evaluate the waveform for optimum symmetry and flatness at each setting.
17. Set the VERTICAL MODE to CH2 and repeat steps 2 through 16 for CH 2.
Use the following procedure to adjust the channel 1 output DC offset.
1. Set up the oscilloscope as follows:
VERTICAL MODE BOTH
CH 1 (CH 2) VOLTS/DIV 10 mV
CH 1 (CH 2) VARIABLE CAL
CH 1 (CH 2) GND In
TRIGGER SOURCE CH 1
2. Position the CH 1 and CH 2 traces to the center horizontal graticule line with
the VERTICAL POSITION controls.
3. Connect the rear panel CH 1 OUTPUT to the front panel CH 2 input with a
50 Ω coaxial cable.
4. Set the C H 2 GND push switch to the out position.
5. On the Main board, adjust VR112 to position the CH 2 trace to the center
horizontal graticule line. S ee Figure 8 for the adjustment location.
Channel 1 Output
DC Of fset
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