GW Instek GOS-6100 Series - Manual (Page 21)

GOS-6112 OSCILLOSCOPE
USER MANUAL
 35 
5-3.Adjustments and checks
Trace Rotation Adjustment
Normally, when the trace is in parallel with the center horizontal graticule
line, there will be no need to adjust the TRACE ROTATION. If necessary,
adjust the TRACE ROTATION to make the baseline trace parallel to the
center horizontal graticule line by using a small straight-blade
screwdriver or alignment tool.
Probe Compensation
To minimize the distortion of measured waveforms, check the
compensation of your probes before using them. The probe compensation
should be checked periodically whenever the probes are moved to
different input channels.
1. Install the probes onto the oscilloscope (Press the BNC connector onto
the channel input and rotate the connector to lock it into place).
2. Set the probe slide switches to the ×10 position.
3. Briefly pressing the CH1/CH2 button to set the oscilloscope to channel
1 and channel 2.
4. Pressing and holding the P×10 button to set the indicated deflection
coefficient of the channel displayed in the readout as a symbol “P10”.
5. Attach the probe tips to the CAL connection in the front of the
oscilloscope.
6. Set the oscilloscope controls to display both channels:
VERTICAL: VOLTS/DIV 1V
COUPLING
DC
ALT/CHOP/ADD CHOP
HORIZONTAL: MODE MTB
TIME/DIV 0.5ms
TRIGGER: MODE ATO
SOURCE CH1 or CH2
COUPLING AC
SLOPE
GOS-6112 OSCILLOSCOPE
USER MANUAL
 36 
7. Observe the displayed waveform and compare them with the
waveforms shown in figure 5-2. If either probe needs to be adjusted,
proceed the step 8. If either probe does not need to be adjusted, proceed
the “Function Check”.
Figure 5-2 Typical Compensation Waveform
8.Adjust the probe by using a small insulated screwdriver. Slowly rotate
the adjustment control until the probe is properly compensated.