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Adjustment Procedures
TAS 455 and TAS 465 Service Manual
5Ć11
a. Using the General Purpose Knob, adjust the display for 2 time
markers per 5 divisions over the center 8 divisions.
b. Select Done when adjusted; a Cal Passed message appears.
24. Select Done to exit the routine.
25. Disconnect the test setup from the oscilloscope.
26. If you do not intend to proceed with Factory Vertical CAL, replace J205
(CAL-DIS) to lock out the calibration routine. (This jumper only works
with firmware version
2.10 and above.)
CAUTION
To prevent accidental loss of calibration, be sure the calibration
lockout jumper (J205) is in place. If J205 is not in place, erroneous
calibration constants can result if the calibration routine is accidenĆ
tally invoked and not properly completed.
Factory Vertical Cal
Equipment Required: One DC calibration generator (item 11), one preciĆ
sion coaxial cable (item 5), and one dualĆinput coupler (item 7).
Prerequisites: Low Frequency Output Compensation adjustment and Self
Cal Horizontal adjustment procedures.
NOTE
To enable factory calibration on oscilloscopes with firmware version
2.10 or above, remove jumper J205 (CAL-DIS) on the CPU board.
(See Figure 5Ć17 on page 5Ć22 for the location of J205.) If you do
not remove this jumper, the message See manual to enable FactoĆ
ry Cal" appears when you select the factory calibration routine.
Firmware versions below
2.10 do not have the calibration lockout
feature and the factory calibration routine can still execute with J205
installed.
1. Press the UTILITY button.