Instructions

6. Set the sine wave generator output level to approximately 300 mV
p-p
into the power splitter. This is about 200 mV
p-p
on channel 1 of the oscilloscope.
The AUX IN input will also be receiving approximately 200 mV
p-p
. Small deviations from the nominal 200 mV
p-p
oscilloscope display are acceptable.
7. Set the leveled sine wave generator frequency to:
• 200 MHz if you are checking a TBS1202C
• 100 MHz if you are checking a TBS1102C
• 70 MHz if you are checking a TBS1072C
• 50 MHz if you are checking a TBS1052C
8. Set the oscilloscope Horizontal Scale (seconds/division) to 4 ns/div.
9. Push the Trigger Level knob to activate the Set To 50% feature. Rotate the Trigger Level knob to adjust the trigger
level as necessary and then check that triggering is stable.
10. Set the oscilloscope Horizontal Scale (seconds/division) to 2 ns/div.
11. Push the Trigger Level knob to activate the Set To 50% feature. Rotate the Trigger Level knob to adjust the trigger
level as necessary and then check that triggering is stable.
12. Change the oscilloscope setup using the following table:
Push menu button Select menu option Select setting
Trig menu Slope Falling
13. Push the Trigger Level knob to activate the Set To 50% feature. Rotate the Trigger Level knob to adjust the trigger
level as necessary and then check that triggering is stable.
14. Disconnect the test setup.
Check Vertical Position Accuracy
The results of this test and the DC Gain Accuracy test together define the DC Measurement Accuracy of the oscilloscope.
The DC Measurement Accuracy specification encompasses two different ranges of operation over two different attenuator
settings.
• DC Gain Accuracy: Identifies errors, mostly from the A/D converter, when the vertical position (known as offset in these
oscilloscopes) is set to 0 divisions (or a grounded input will show screen center)
• Vertical Position Accuracy: Identifies errors, mostly from the position control, made when the vertical position is set to a
non-zero value.
The two attenuator settings operate identically, so verification of the attenuation range from -1.8 V to 1.8 V also verifies the
attenuation range of -45 V to 45 V.
1. Set up the oscilloscope as shown in the following table:
Push menu button Select menu option Select setting
Default Setup - -
Channels 1, 2 Probe 1X
Channels 1, 2 Volts/Div 50 mV/div
Trig Menu Source
Aux In
3
Mode Mode
Acquire Sample -
Measure Source Channel under test
Measurements Mean
3
The test operates without a trigger. To maintain uniformity and to avoid false triggering on noise, the Aux In is the recommended source.
Performance verification
TBS1000 Series Oscilloscopes Series Digital Storage Oscilloscope Technical Reference 20