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5.3.17
Input impedance adjustment
TEST EQUIPMENT
SETTING
REQUIREMENTS
ADJUSTMENT
1
ADJUSTMENT 2
SETTING
ADJUSTMENT
Square-wave calibration generator
Vertical mode - A
Channel A AMPL/DIV - 5 mV
Apply a 1 kHz square-wave signal to channel A via a 10: 1
probe and set the amplitude at 5 div.
Adjust the probe trimmer for a proper waveform.
After that, set AMPL/DIV - 0,1 V for adjustment 1, at 1 V for
adjustment 2.
Pulse aberrations must be < 5 %.
Adjust VC4 (VERT PCB) for optimum waveform, AMPL/DIV -0,1 V.
Adjust VC7 (VERT PCB) for optimum waveform, AMPL/DIV - 1 V.
Repeat for channel B.
Repeat for channel B by means of VC104 and VC107 (VERT PCB).
5.3.18
Dual A and B, polarity inversion channel B
TEST EQUIPMENT
SETTING
REQUIREMENTS
ADJUSTMENT
5.3.19
ADD facility
TEST EQUIPMENT
SETTING
REQUIREMENTS
ADJUSTMENT
Square-wave calibration generator
Vertical mode - DUAL
Both channel A and B coupling - DC
Both channel A and B AMPL/DIV - 0,5 V
TIME/DIV - 0,5 ms
Apply a 1 kHz square-wave signal to both A and B and set fo:
a trace height of 4 div.
Check whether A and B are displayed with the same polarity.
Switch the channel B position switch to INVERT and check
whether the polarity of waveform B is reversed.
NO
Square-wave calibration generator
Vertical mode - DUAL
Both channel A and B coupling - DC
Both channel A and B AMPL/DIV - 0,5 mV
TIME/DIV - 0,5 ms
Apply a 1 kHz square-wave signal to both A and B and set fo!
a trace height of 4 div.
Check whether A and B are displayed with the same polarity,
waveform height 4 div.
Press ADD and check that only one waveform of 8 div is shown.
Switch channel B to INVERT and check that only one straight
line is displayed.
NO
5.3 PERFORMANCE CHECK AND ADJUSTMENT PROCEDURE
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