TB 9-6625-2164-35
bp.Move the positive lead of multimeter to TP640 and adjust MINUS PEAK OFFSET
R645 (fig. 3) for 10.0 mV indication on multimeter.
bq. Press CH 1 AC pushbutton.
br. Repeat bj above. If this requirement cannot be met, perform the following
procedure. Observe the direction of trigger point movement when switching from AUTO
+SLOPE to P-P +SLOPE. If triggering point moves up, subtract 10 mV from multimeter
reading in bo above and add 10 mV to multimeter reading in bp above. If triggering point
moves down, add 10 mV to multimeter reading in bo above and subtract 10 mV from
multimeter reading in bp above.
bs. Repeat aw through bj above.
bt. Remove all connections from TI.
bu. Press MENU/TEST and MEMORY DISPLAY 4, 5, 6 and MENU/TEST pushbuttons.
bv. Press CH 1 GND pushbutton.
bw. Adjust TRIGGERING/LEVEL control to 0.
NOTE
Do not disturb the settings of the TRIGGERING LEVEL
control throughout the remainder of this step.
bx. Press f (function) and MENU/TEST pushbutton.
CALIBRATION MENU will be displayed on TI.
bz. Select FAST RAMP GAIN/COUNT by pressing MEMORY DISPLAY pushbutton 1.
ca. The FAST RAMP TEST/ * SERVICE ONLY * and GAIN COUNT will be
displayed (flashing) on TI. TI display GAIN will indicate between 99.7 and 100.3; if not,
adjust RAMP GAIN R320 (fig. 5) for GAIN indication of 100.0.
cb. Press MEMORY DISPLAY 6, f (function) and MENU/TEST pushbuttons.
cc. Set CH 1 VOLTS/DIV switch to 50 mV and press AC pushbutton.
cd. Set TIME/DIV switch to 2 s.
input using 50 Ω termination.
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