Tektronix 3B5, Instruction Manual

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Calibration — Type 3B5
Fig. 6-7. Initial test equipment setup for steps 7—16.
Control Settings
Type 3B5
Mode MAN
POSITION Midrange
DLY'D SWP MAG OFF
DELAY 1.00
MANUAL TIME/DIV 1 ms
VARIABLE CAL
Trigger Function
INT-AUTO
LEVEL Midrange
SLOPE
+
Amplifier Unit
Position Midrange
Input Coupling DC
Volts/Division 0.5 Volts
Mode Manual
7. Adjust Basic Timing
a. Test equipment setup is shown in Fig. 6-7.
b. Connect the time-mark generator to the amplifier unit
input connector through the 50-ohm BNC cable and a 50-ohm
BNC termination.
c. Set the time-mark generator for one-millisecond markers.
d. Position the second marker to the first graticule line
with the POSITION control.
e. CHECK —CRT display for one marker each division
between the first and ninth graticule lines (see Fig. 6-8A).
NOTE
Unless otherwise noted, use the middle eight hori ­
zontal divisions when checking or adjusting timing
(see Fig. 2-4, Operating Instructions section).
Indicator Oscilloscope
Focus Adjust for correct
display
Intensity Visible Display
Calibrator 10 Volts
Power On
f. ADJUST —CAL adjustment, R515 (see Fig. 6-8B), for one
marker each division.
g. INTERACTION— Check steps 10 — 21. (This adjustment
should be checked and readjusted as necessary when the
Type 3B5 is inserted into a plug-in compartment other than
the one in which it was calibrated.)
6-10