User manual

Application Examples
Using Autoran
ge to Examine a Series of Test Points
If you have a machine that is malfunctioning, you may need to find the frequency
and RMS voltage of several test points, and compare these values to ideal values.
You are not ab
le to access front-panel controls since you need to use both hands
when probing test points that are difficult to physically reach.
1. Push the 1 (c
hannel 1 menu) button.
2. Push Probe ► Vo ltage ► Attenuation and set to match the attenuation
of the prob
e attached to channel 1.
3. Push the AutoRange button to activate autoranging, and select the Vertical
and Horiz
ontal option.
4. Push the Measure button to see the Measure Menu.
5. Push the top option button; the Measure 1 Menu appears.
6. Push Source ► CH1.
7. Push Type ► Frequency.
8. Push the Back option button.
9. Push t
he second option button from the top; the Measure 2 Menu appears.
10. Push Source ► CH1.
11. Push Type ► Cyc RMS.
12. Push the Back option button.
13. Attach the probe tip and reference lead to the fi rst test point. Read the
frequency and cycle RMS measurements from the oscilloscope display and
compare these to the ideal values.
14. Repeat step 13 for each test point, until you find the malfunctioning
component.
NOTE. When Autorange is active, each time you move the probe to another test
point, the oscilloscope readjusts the horizontal scale, the vertical scale, and the
trigger level, to give you a useful display.
TBS1000 Series Oscilloscopes User Manual 35