TB 9-6625-2164-24
bf. Connect multimeter between TP400 and GND REF TP900 (fig. 2).
bg. Adjust TRIGGERING LEVEL control for -1.28 V, + 10 mV indication on multimeter.
bh. Set CH 1 VOLTS/DIV switch to 1 V, and set function/arbitrary generator output
frequency to 1 kHz and amplitude for 0.4 divisions on TI display.
bi. The 1 kHz sine wave will remain triggered while switching between AUTO +
SLOPE and AUTO - SLOPE without readjusting TRIGGER LEVEL control; if not,
repeat steps w through au above.
bj. While switching between the P-P + SLOPE and P-P - SLOPE, observe that the
1 kHz remains triggered without adjusting the TRIGGER LEVEL.
NOTE
If the requirements of bi and bj above are met, ignore the
remainder of this step (bk through bs) below.
bk. Press CH 1 GND pushbutton.
bl. Press TRIGGERING MODE/AUTO, COUPLING/AC and + SLOPE pushbuttons.
bm. Connect multimeter between TP400 and GND REF TP900 (fig. 2).
bn. Adjust TRIGGERING LEVEL control for -1.28 V, + 10 mV indication on multimeter .
bo. Move the positive lead of multimeter to TP540 and adjust PLUS PEAK OFFSET
R546 (fig. 3) for + 10.0 mV indication on multimeter.
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.
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