Tektronix 503, Instruction Manual

Page: 52 / 147

Calibration— Type 5 0 3
□ 53. Check Calibrator A c cu ra cy-5 0 0 mV. Page 6-31
Amplitude 500 mV ± 3 % .
Q 54. Check Calibrator Symmetry. Page 6-31
Symmetry ratio not more than 2:1.
Q 55. Check Calibrator Frequency. Page 6-31
Frequency 350 Hz ± 5 0 % .
0 56. Check C alibrator Jitter. Page 6-31
Horizontal Jitter not more than 1.5 cm.
CALIBRATION PROCEDURE
General
In the following calibration procedure, a test equipment
setup is shown for each maior setup change. Complete
control settings are listed following the first equipment setup.
In subsequent setups, only the controls which have been
changed from the preceding step are listed. Controls which
are not shown on the setup list may be left in any position.
If only a partial calibration is performed, start with the near­
est setup preceding the desired portion.
NOTE
W hen pe rfo rm in g a com plete re c a lib ra tio n , best
perform ance w ill be pro vid e d if each adjustm ent
is m ade to the exact setting, even if th e Check is
w ith in the a llo w a b le tolerance.
The following procedure uses the equipment listed under
Recommended Equipment. If substitute equipment is used,
control settings or setup must be altered to meet the require­
ments of the equipment used.
Preliminary Procedure
1. Remove the side covers from the Type 503.
2. Connect the Type 503 to the autotransformer, and set
the autotransformer to 117 volts.
3. Turn the POWER AND SCALE ILLUM. control clock­
wise and adjust the graticule illumination as desired.
4. Allow the Type 503 to warm up for at least 5 minutes
before proceeding further.
NOTES