! !
! !
5Ć8
# $
! ! One time mark generator (item 9), one precision
coaxial cable (item 5), and one 50 W termination (item 3).
! CRT adjustment procedure.
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 5Ć23 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. Disconnect all signal inputs from the oscilloscope.
2. Press the button to display the Utility menu.
CAUTION
To avoid replacing the calibration constants with erroneous values,
be sure to complete all steps of this procedure after initiating the
calibration routine.
3. Select from the main menu.
4. Select # $ , initiating the calibration routine.
This routine takes about 20 seconds to complete its initial calibrations.
Once complete, 2 dots are displayed and the message
" ! " appears. The displayed dots are used for the next
horizontal calibration steps.
NOTE
The following steps use both the General Purpose Knob and the
TOGGLE button to make adjustments. The General Purpose Knob
performs two functions: to adjust horizontal gain and centering. The
TOGGLE button selects the function of the General Purpose Knob.
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