89
Subject to change without notice
MANUAL ADJUSTMENT PROCEDURE HM1508-2
R4840
63 X-Mag. x10 Adjustment
– Locate and identify R4840 on MB-Board.
– Set TIME/DIV knob for “TB: 50μs” display.
– Press MAG x10 pushbutton so that x10 is lit.
– Set POSITION 1 knob on the front panel so that the trace is displayed in the vertical centre of the graticule.
– Connect a 200 kHz signal from HZ620 (SIGNAL pushbutton setting “Pulse 50 Ohm“) to the input of CH 1.
– Turn CH 1 VOLTS/DIV knob and sine wave generator output level for approx. 8 divisions signal height.
– Set LEVEL A/B knob on the front panel for stable triggering.
Adjustment Procedure:
– Move trace with HORIZONTAL knob (front panel) so that the fi rst zero crossing coincides with the fi rst or
second vertical graticule line at the left side of the screen.
– Adjust R4840 so that 1 signal period per division is displayed and the rightmost zero crossing coincides with
the vertical graticule line as on the left side.
C4810 C4809
R4086 R4840 R5107
correct too slow too fast
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