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Adjustment Procedures

Adjustment Procedure

The adjustment procedure consists of 70 steps for the 2-channel oscilloscope, and

106 steps for the 4-channel model. Each step requires an external voltage source

for new calibration constants.

Before performing the adjustment procedure, warm up the oscilloscope for at least

ten minutes in an ambient temperature between 20 °C and 30 °C. Adjustments

performed before warm up or outside this temperature range may result in poor

performan

ce.

If all steps in the p rocedure are completed successfully, a "Pass" message is

displaye

d and the new calibration constants take effect. If any step fails, the

procedure is aborted and the current calibration is not affected. You can choose

to abort the procedure at any step, without affecting the current calibration, by

selecting FCAL ABORT.

NOTE. While performing the adjustment procedure, keep in mind that some o f the

steps take a signiﬁcant amount of time (up to 5 minutes) to complete.

Equipment setups are shown in the following ﬁgure. (See Figure 5-1 on page 5-3.)

Signal requirements for each step are shown in the following table. (See Table 5-2

on pa

ge 5-5.)

Enable the Service Menu

Before performing the adjustment procedure, enable the Service menu as follows:

1. Power on the oscilloscope.

2. Push the front-panel Measure button to access the Measure menu.

3. Push the top option b utton to access the Measure 1 menu.

4. Pu

sh and hold the front-panel Single button.

5. Push and hold the front-panel AutoSet button.

6. Wait at least two seconds.

7. Release the Single button.

8. Release the AutoSet button. A message appears in the lower left corner of the

screen stating "Service mode ON."

9. Push the front-panel Utility button. The last item in the Utility menu is now

"Service."

At completion of the Adjustment procedure, disable the "Service" menu through

the Utility front panel button, the "Service" option button, and the "Service"

Mode Off" option button.

5–2 TDS2000C Series Oscilloscope Service Manual

Tektronix TDS2012C User Manual

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