TB 9-6625-2164-24
Figure 3. Tektronix, Type 7D20 bottom view - adjustment locations.
Figure 4. Tektronix, Type 7D20 left side view - adjustment locations.
ag. Set CH 1 VOLTS/DIV switch to 5 V. SIGNAL display should not be triggered
using the TRIGGER LEVEL control. If so, adjust HYSTERESIS R444 (fig. 3) for a stable
trigger at CH 1, 2 V VOLTS/DIV and no stable trigger at CH 1, 5 V VOLTS/DIV.
ah. Press TRIGGERING/COUPLING AC pushbutton.
ai. Set CH 1 VOLTS/DIV switch to 500 mV.
aj. Set TIME/DIV switch to 1 ms.
divisions on TI display.
al. Adjust TRIGGERING LEVEL control for a stable display at 1 kHz.
for T=0.0S.
am. Observe T=( ) on display and set CURSORS
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