TIME-BASE GENERATOR
13. 10/xSecond Sweep Timing (C160C). Place
the TIME/CM switch in the 10 ^SEC position and
the HORIZONTAL DISPLAY switch in the NOR
MAL (XI) position. Apply 10/xsecond time mark
ers to the vertical input and adjust C160C for 1
marker per centimeter.
14. 1 /^Second Sweep Timing (C160A). Place the
TIME/CM switch in the 1 /jlSEC position and ap
ply 1 /^second markers to the vertical input. Ad
just C160A for 1 marker per centimeter. Discon
nect the markers.
VERTICAL AMPLIFIER
NOTE
Adjustments 15 through 29 apply to
both the vertical amplifiers. Com
plete recalibration of one amplifier
before proceeding to the other.
15. COARSE DC BAL. Rotate the TRIGGERS
LEVEL control to the RECURRENT position and
the DC BAL control to midrange. Ground the
vertical input terminal. Place the SENSITIVITY
control in the 5 VOLTS PER CM position, and
position the trace to the appropriate horizontal
centerline. Adjust the COARSE DC BAL control
so that the trace does not shift vertically as the
SENSITIVITY switch is rotated between the 5
VOLTS PER CM and 2 VOLTS PER CM positions.
A
Fig. 6-7. Adjustment of the .2M V/CM
If Ihe .2MV/CM DIFF BAL control
similar to waveform A will be obtain*
play obtained when the control is adju
16. DC BAL. Leave the vertical input terminal
grounded as in step 15. After adjusting the
COARSE DC BAL control, rotate the SENSITIVITY
switch to the 200 /WOLTS PER CM position and
adjust the DC BAL control so that the trace lies
behind the appropriate horizontal centerline.
17. .2V/CM DIFF BAL. Set the SQUARE-WAVE
CALIBRATOR switch at IV and apply the calibra
tor output to both A and B input connectors of
the vertical amplifier. Place the SENSITIVITY
control in the .2 VOLTS PER CM position and the
Input Selector switch in the DC A-B (DIFF.) posi
tion. Set the TIME/CM switch at 1 MILLISEC.
Position the trace so that it lies behind the ap
propriate horizontal centerline. Adjust the .2V/
CM DIFF BAL control for minimum vertical de
flection.
B
DIFF BAL control.
is slightly misadjusted, a waveform
id. Waveform B shows a typical dis-
sted properly.
RECALIBRATION PROCEDURE — TYPE 502
6-5
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