44
Subject to change without notice
9
RV4002:
Focus control
- Locate and identify RV4002 on TB-Board.
- Connect a 1MHz square wave signal with 25mV
pp
at 50 Ω
(HZ22) to input CHI.
- Set time base to 0.1 μs/div.
- Set INTENS for medium intensity.
- Adjust FOCUS control for optimum sharpness.
- Set INTENS for maximum intensity.
- Do not change the FOCUS setting.
- Adjust RV4002 for optimum FOCUS (minimum trace dia-
meter of the leading edge).
Incorrect Correct
10
P2007:
Y-Gain CH I at 5 mV/div
– Locate and identify P2007 on YP-Board.
– Connect a 25 mV
pp
/ 1 kHz square wave signal via a 50 Ω
cable and a 50 Ω through-terminator to input channel I.
– Set input attenuator CH I to 5 mV/div.
– Set input coupling to DC.
– Rotate variable gain knob clockwise to CAL. position.
– Set input coupling to DC.
– Set time base to 0.5 ms/div.
– Adjust P2007 for 5 division signal height.
– Rotate variable gain knob fully counter clockwise (left
stop).
– Check that the signal height is 2 divisions or less.
– Rotate variable gain knob to CAL. position.
Incorrect (too low)
Incorrect (too high)
Correct
2.5 : 1 signal
<
2div
RV4003
RV4004
CV4001
RV4005
TB-Board
RV4002
RV4001
P2008
P2011 P2012
P2006
P2007
P2005
P2002
P2001
C2007
C2010
C2009
C2011
P2003
C2107
C2108
C2103
C2110
P2016
P2014
P2015
P2010
P2009
YP-Board
A d j u s t m e n t P r o c e d e r e H M 3 0 3 - 6
