Tektronix 4000 Series, Service Manual

Page: 31 / 78

Adjustment Procedures
Tektronix 4000 Series Digital Phosphor Oscilloscopes Service Manual
3- 7
12. Push the OK Do Factory Calibration side--bezel button, as shown in
Figure 3--4, to start the adjustment process. Prompts appear on the oscillo-
scope screen to indicate the signal type and the channels to which it should
be connected.
NOTE
. The oscilloscope adjusts itself automatically using the calibrator signal
as a reference. You do not need to make any adjustments.
If you make an error, such as connecting the wrong input signal, you can repeat
the last step by pushing the
Return to Previous Screen
side bezel button.
13. For each step, refer to the next table to identify the signal type, and then
carefully follow the instructions for that signal type on the specified page.
Signal type Example prompt Refer to Parameters to set
DC Voltage Apply 0 V DC 50
Ω
ter-
mination signal to 3.
Page 3--8 Waveform type, voltage,
termination, channel
Time Mark Apply 500 mV Pk--Pk 625
Hz 50
Ω
termination
time mark signal to 3.
Page 3--9 Waveform type, voltage,
frequency, termination,
channel
Deskew Apply 1.0 V Pk--Pk 1 kHz
50
Ω
termination deskew
signal to 3.
Page 3--10 Waveform type, voltage,
frequency, termination,
channel
Sine Signal Apply 2.0 V Pk--Pk 164M
50
Ω
termination sine
signal to 3.
Page 3--11 Waveform type, voltage,
frequency, termination,
channel
NOTE
. The oscilloscope screen will not provide you with all of the information
that you need to complete the steps successfully, so it is critical that you follow
the steps outlined in the Completing the Procedure section. Each time a new
prompt appears, refer to the table above to identify the signal type, and then
ensure that you are following every step that is outlined for that specific signal
type.
14. Continue with the adjustment process until it is complete and you receive the
Pass notification. You can cancel the process at any time by pushing the
MENU OFF
button.
15. Complete the performance verification tests to verify that the adjustment
procedure has correctly calibrated the oscilloscope. (See the
Tektronix 4000
Series Technical Reference .) Incorrect use of calibration equipment can cause
the oscilloscope to pass the Calibration Procedure but fail Performance
Verification.