Calibration— Type 503
f~1 14. Adjust Coarse DC Balance—Vertical. Page 6-10
DC balancing by adjustment of R436.
□ 15. Adjust Coarse DC Balance—Horizontal. Page 6-10
DC balancing by adjustment of R346.
□ 16. Adjust .2V/CM Gain—Vertical. Page 6-11
Correct vertical amplifier gain.
I | 17. Check Variable Control Ratio—Vertical. Page 6-12
Ratio of <2.5:1.
3 ] 18. Adjust 1 mV/CM Gain—Vertical. Page 6-12
Correct vertical amplifier gain.
| | 19. Adjust .2V/CM Gain— Horizontal. Page 6-12
Correct horizontal amplifier gain.
3
) 20. Check Variable Control Ratio—Horizontal. Page 6-12
Ratio of >2.5:1.
I I 21. Adjust 1 mV/CM Gain— Horizontal. Page 6-12
Correct horizontal amplifier gain.
|~1 22. Check Compression or Expansion—Horizontal.
Page 6-13
±1 .5 mm compression or expansion with 2 cm signal.
31
23. Check Amplifier Balance—Horizontal (DC Common
Mode Rejection). Page 6-13
Horizontal Amplifier CMRR 100:1 and 50:1 with speci
fied inputs and sensitivities.
□ 24. Check Compression or Expansion— Vertical.
Page 6-13
■±.15 mm compression or expansion with 2 cm signal.
3 25. Check Amplifier Balance—Vertical (DC CMRR).
Page 6-13
Common mode rejection ratio 100:1 and 50:1 with
specified inputs and sensitivities.
3 26. Check Attenuator Accuracy—Vertical +INPUT and
-INPUT. Page 6-14
Vertical deflection +1.5mm with 5 cm signal (3%).
3 27. Check Attenuator Accuracy—Horizontal +INPUT and
-INPUT. Page 6-14
Horizontal deflection ±1.5 mm with 5 cm signal (3%).
(31 28. Re-check Trace Shift Due to Input Grid Current.
Page 6-14
Trace shift < 1 cm.
□ 29. Adjust Attenuator Compensation—Vertical. Page 6 15
Waveform flat-topped; no more than 2% overshoot
or rounding.
| | 30. Adjust Attenuator Compensation—Horizontal.
Page 6-18
Waveform flat-topped; no more than 2% overshoot
or rounding.
| | 31. Adjust Amplifier Phasing. Page 6-21
Phase difference not more than 1 ° (1 mm).
31-32. Check Common Mode Rejection Ratio. Page 6-23
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Horizontal/Vertical rejection ratio 100:1 with sensi
tivities and signals specified.
Check Vertical Amplifier Frequency Response.
Page 6-24
< - 3 dB at 450 kHz.
Check Horizontal Amplifier Frequency Response.
Page 6-24
< —3dB at 450kHz.
Adjust Sweep Stability. Page 6-25
Free running trace at approximately 50 kHz rate.
Check Triggering— External High Frequency.
Page 6-26
Correct triggering; see Calibration Procedure.
Check Triggering— Internal High Frequency.
Page 6-26
Correct triggering; see Calibration Procedure.
Check Triggering—External (1 kHz Square Wave).
Correct low frequency triggering.
Page 6-27
Check Triggering— Internal (1 kHz Square Wave).
Page 6-27
Correct low frequency triggering.
Check Line Triggering.
Correct line frequency triggering.
Page 6-27
Adjust Sweep Timing— 1 mSEC/CM.
Timing accuracy, ± 3% (2.4 mm in 8 cm).
Page 6-28
Adjust Sweep Length.
Sweep length 10.2 to 10.8 cm.
Page 6-28
Adjust Sweep Timing— 10/i.SEC/CM.
Timing accuracy, ±3 % .
Page 6-28
Adjust Sweep Timing— 1 /tSEC/CM.
Timing accuracy, ± 3% .
Page 6-29
Check Variable Control Ratio.
Page 6-29
Sweep Time/cm Variable Control ratio
>2.5:1.
Check Sweep Timing.
Page 6-29
Timing accuracy, -t-3% at all switch settings.
Adjust Sweep Magnifier Registration.
<0.5 cm horizontal shift.
Page 6-29
Re-check Horizontal Drift.
Marker drift < 4 mm after 30 seconds.
Page 6-30
Check Magnifier Accuracy.
Accuracy tolerance 5%.
Page 6-30
Check Sweep Jitter.
Horizontal jitter 2 mm or less.
Page 6-30
Check Z axis Operation.
Intensity modulation with 10-volt signal.
Page 6-31
Adjust Amplitude Calibrator—5 mV.
Amplitude 5 mV ±3 % .
Page 6-31
6-4
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