Tektronix 11801B Service Manual page 89

Performance Tests
Vertical Accuracy This procedure shows the setups and lists the steps to check the vertical
accuracy of the oscilloscope.
Setup to Check Vertical Gain
Calibration Head DIRECT Input
11801B
Prec. Voltage Source
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50.1 Coaxial Cable
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Procedure to Check Vertical Gain
shown in the setup diagram (CH 1/CH 2 slot). If the unit is in Standby
mode, set the power switch to ON. Set the Precision Voltage Source to
0 V and connect it to Channel 2 of the Calibration Head.
NOTE
If powering up from a cold start, the diagnostics will report an error
using the Calibration Head. The report will indicate a Time Base
error. To Clear this, exit the diagnostics. Then, ignore the subse-
quent time base calibration failure notice and continue with the
following steps.
Initialize (in major MENU) «26. ee eee touch
Initialize (in verification pop-up menu) ...............065 touch
TRIGGER button 0... c een eens press
Source (in major MENU) ©... 6. eee eee touch
11801B Service Manual 4-25