Tektronix DCM300, Technical Reference

Page: 306 / 382

TAS 200 Series Performance Verification
18
Handheld and Benchtop Instruments Basic Service
Cursor Check
The following checks verify the cursor accuracy of your oscilloscope.
To check cursor
D
T measurement accuracy, implement the following steps.
1. Set up the oscilloscope as follows:
VERTICAL MODE CH1 (CH2)
HORIZONTAL SEC/DIV 1 ms
2. Press and hold the oscilloscope CURSOR ON/OFF push switch to activate
the cursors.
3. If not already displayed, press and hold the
D
V/
D
T 1/
D
T push switch until
two vertical cursors appear on the display.
4. Toggle the TRACKING
◊
– O
(
REF
)
switch to select only the
◊
cursor.
5. Position the
◊
cursor 4 divisions to the left of the display vertical center with
the CURSOR POSITION switch.
6. Toggle the TRACKING
◊
– O
(
REF
)
push switch to select only the O cursor.
7. Position the O cursor 4 divisions to the right of the display vertical center
with the CURSOR POSITION switch.
8. Verify that the
D
T readout at the top-left corner of the display reads between
7.72 and 8.28 ms.
9. Set the VERTICAL MODE switch to CH2 and repeat steps 4 through 8 for
CH 2.
To check cursor
D
V measurement accuracy, implement the following steps.
1. Set up the oscilloscope as follows:
VERTICAL MODE CH1 (CH2)
VERTICAL VOLTS/DIV 1 V
2. Press and hold the oscilloscope
D
V/
D
T 1/
D
T push switch until two
horizontal cursors appear on the display.
3. Toggle the TRACKING
◊
– O
(
REF
)
switch to select only the
◊
cursor.
4. Position the
◊
cursor 3 divisions above the display horizontal center with the
CURSOR POSITION switch.
5. Toggle the TRACKING
◊
– O
(
REF
)
push switch to select only the O cursor.
D
T Measurement
Accuracy
D
V Measurement
Accuracy