Tektronix 3B2 TIME-BASE Instruction Manual page 18

Calibration — Type 3B2
C8oF R310
SWEEP TAKEOFF
10:2 o-oo Sip
- we
.
,
evn
*
me ¢
C260c C260A R145 RIS4
THRESHOLD
my on ay om
aoe e@eo-
py o fa) ca " Me bn ob . e °
Fig. 6-1. Type 382 Internal adjustment locations,
Preset the front-panel controls as follows
POSITION Midrange
SWEEP DELAY OUT
TIME/DIV 1 mSEC
DELAY TIME 1 ms
Multiplier Dial 0.50
COUPLING AC SLOW
Adjustment Procedure
1. Trigger Threshold
With the trigger LEVEL set at FREE RUN [detent position),
adjust the TRIGGER THERESHOLD control (R110) until the
2. Sweep Calibration
Connect the time-mark generator to the Channel | input,
and display 1-msec time marks. Set the Type 3B2 TIME/DIV
switch to | mSEC and adjust the SWEEP CAL control [front-
pane! screwdriver adjustment) for | marker per major grati-
3. Sweep Length
With the same setup as in step 2, set the SWEEP LENGTH
control (R268) for 10.5 major divisions of display. Use the
POSITION control to move the right-hand time mark 1
division to the left. The tail of the display should be '/,
4. Normal Sweep Rates
Use the settings of the Type 3B2 TIME/DIV switch and
the time marks listed in Table 6-1, and make the adijust-
ments and checks indicated
The timing error for all sweep rates must be within
the Ist and 9th division lines.