GW Instek GOS-6000 Series - Manual (Page 18)

GOS-6051/6050/6031/6030 OSCILLOSCOPE
USER MANUAL
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5-2.Connecting Input Signals
Grounding
The most reliable signal measurements are made when the oscilloscope and
the unit under test are connected by a common reference (ground lead) in
addition to the signal lead or probe. The ground lead of the probe provides the
best grounding method for signal interconnection and ensures the maximum
amount of signal-lead shielding in the probe cable. A separate ground lead
(with a banana plug) can also be connected from the unit under test to the
oscilloscope ground jack on the front panel.
Probes
A probe provides the most convenient way to connect an input signal to the
oscilloscope. The standard Ч1/Ч10 probes supplied to the oscilloscope are
shielded against electromagnetic interference and have a high input impedance
for low circuit loading.
CAUTION. To get the best waveform precisely, keep
probe ground and signal leads as short as possible.
Misadjust probe compensation can cause measurement error. Check and adjust
probe compensation whenever a probe is moved to a different channel or
oscilloscope. As for the probe compensation adjustment procedure, refer to the
“Probe Compensation”.
Coaxial Cables
Signal input cable can greatly affect the accuracy of a displayed waveform. To
maintain original frequency characteristics of the input signal, use only high-
quality, low-loss coaxial cables. Coaxial cables must be terminated at both
ends in their characteristic impedance to prevent signal reflections within the
cable. Use suitable impedance-matching devices.
GOS-6051/6050/6031/6030 OSCILLOSCOPE
USER MANUAL
⎯ 31 ⎯
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 0.2V
COUPLING DC
ALT/CHOP CHOP
HORIZONTAL:
TIME/DIV 0.5ms
TRIGGER: MODE ATO
SOURCE VERT
COUPLING AC
SLOPE
7. Observe the displayed waveform and compare them with the waveforms