GW Instek GDS-122 User Manual - Manual (Page 26)

Using the Oscilloscope
51
8B
Calibration
Overview The self calibration automatically adjusts the GDS‐
122 internal parameters. The probe calibration
adjusts the probe capacitance. You should run
both whenever using the GDS‐122 in a new
environment.
42B
Running the self calibration
Overview The self calibration function automatically
configures internal parameters to maintain the
sensitivity and accuracy. Run the self calibration in
the following cases.
• When the temperature fluctuates more than 5
degrees Celsius during operations
• When operating the GDS‐122 in a new
benchtop or field environment
Procedure 1. Press the MENU key and
select the FUNCTION menu
using the Up/Down keys.
MENU FUNCTION
2. Press F2 (Autocalibration). A
message appears on the
display, asking you to remove
all cables and probes from the
GDS‐122.
Autoca-
libration
F2
3. After removing all cables,
press F2 (Autocalibration)
again. The self‐calibration
automatically starts and a
message appears, showing
that the calibration is
ongoing.
Autoca-
libration
F2
4. When the message disappears in 5 minutes, the
calibration is completed.
To interrupt
calibration
Press any key during the calibration.
GDS-122 User Manual
52
43B
Running the probe calibration
Overview The attached probe contains a calibration point at
the end to adjust the waveform.
Procedure 1. You may use the GDS‐122’s own
1kHz square wave output
signal. Insert the signal cable
(included in the package) to the
output terminal.
2. Use the Autoset function to put
the waveform in the middle of
the display.
AUTOSET
3. Adjust the probe calibration point to make sure
that the waveform edge remains flat.
Over-
compensation
Optimum Under-
compensation