Tektronix DPO3000 Series, Service Manual

Page: 27 / 79

Adjustment Procedures
This chapter contains the factory adjustment procedure for the MSO3000
and DPO3000 Series oscilloscopes. Only quali
fi ed personnel should perform
adjustment procedures. Read the Service Safety Summary and the General Safety
Summary before performing any service procedures.
NOTE.
The voltage references inside the oscilloscope are very stable over time
and should not require routine adjustment. Before performing any procedure
in this chapter, do the Performance Veri
fi cation procedures to check whether
the oscilloscope meets speci fi cations. See the MSO3000 and DPO3000 Series
Speci fi cations and Performance Veri fi cation Technical Reference.
Successful completion of this adjustment procedure automatically updates the
stored time and date of the latest successful adjustment. Completion of the
Performance Veri
fi cation procedure does not update this date and time. If no
adjustment is needed, there is also no need to update the time and date of the
adjustment.
Required Equipment
The following equipment, or a suitable equivalent, is required to complete these
procedures.
The following table speci fi es required equipment for adjusting the oscilloscope.
Description Minimum requirements Example
DC voltage source 50 mV to 70 V, ±0.1% amplitude accuracy Fluke or Wavetek 9500 Oscilloscope
Calibrator with 9530 active heads
Sine Generator 1 kHz 1 GHz Fluke or Wavetek 9500 Oscilloscope
Calibrator with one 9510 Output Module
Edge Generator 1 kHz with < 50 ps ch-ch skew Fluke or Wavetek 9500 Oscilloscope
Calibrator with one 9510 Output Module
50 Ω BNC cable BNC male to BNC male, about 10 in (25 cm.)
long Tektronix part number 012-0208-00
Adjustment tool Non-conducting shaft with diameter = 0.1 in.
(= 2.5 mm) Tektronix part number 003-1433-00
Overview of the Adjustment Process
Before performing adjustment procedures, you must warm up the oscilloscope
for at least 30 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 performance or calibration failure.
MSO3000 and DPO3000 Series Digital Phosphor Oscilloscopes Service Manual 3–1