62
Subject to change without notice
38 Y-Amplifi er Bandwidth Check
– Connect a 40 mV
pp
/50kHz sine wave signal from a Constant
Amplitude Generator via a 50 Ω through-termination to the
input of CH I.
– Adjust the generator amplitude for 8 div. display height on
the screen.
– Increase the generator frequency until the signal is display-
ed with 5.6 div. height (–3dB).
– Repeat the adjustments of item 37 if the frequency reading
on the generator shows a value less than 35 MHz and check
the Y-Amplifi er Bandwidth again.
– Repeat the Y-Amplifi er Bandwidth Check under channel II
conditions.
CH I 50 kHz
CH I -3dB
>
35 MHz
CH II 50 kHz
CH II -3dB
>
35 MHz
39
RV9001:
Component-Tester Y-Offset
– Press COMP. Tester pushbutton (IN position).
– Check that the COMP. Tester sockets are not short circui-
ted.
– Locate and identify RV9001 on XY-Board.
– Adjust RV9001 to move the trace (approx. 8 division length)
in vertical direction to the horizontal centre line of the gra-
ticule.
Note: Despite usage of Mu-metal shielding of the CRT, due to
effects of the Earth`s magnetic fi eld small display deviations
cannot be entirely avoided.
Correct
Incorrect
Incorrect
CV9002
XY-Board
RV9002
RV9004
RV9003
RV9006
CV9001
RV9005
RV9001
M9001
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
