Tektronix 2A61 Instruction Manual page 54

Calibration—Type 2A61
1000;1 Divider
Special Input Coble
Standard Amplitude Calibrator
Amplitude .) volt
Mode DE
Selector Switch Up position
20. Check Trace Restorer
a, Test equipment setup is shown in Fig. 6-30.
b. Connect the BNC end of the Special Input Cable, (with
the 4 pin connector on one end and the BNC connector on
the other), to the Standard Amplitude Calibrator output.
c. Connect the 4 pin connector end of the Special Input
Cable to the Type 2A6] INPUT,
d, Locate the trace on the Type 561A CRT,
Fig. 6-30, Initial test equipment for step 20,
Control Settings
e. Center the trace vertically using the Type 2A6] POSI-
TION control,
f. Switch the Type 2A6] INPUT SELECTOR to —B.
g. Note that the trace indicator neon lights and then
extinguishes as the trace returns to the Type 561A CRT grati-
Type 2A61 cule area.
POSITION Midrange :
FREQ RESPONSE h. Allow the trace to return to the graticule center.
FROM 'nash i , Switch the INPUT SELECTOR to A.
TO 3. MHz
INPUT SELECTOR A j. Note that the trace indicator neon lights and then
FILTER OUT extinguishes as the trace returns to the Type 561A CRT grati-
MILLIVOLTS/DIV 20 cule area,
VARIABLE CALIB k. Switch the Standard Amplitude Calibrator Mode to TU.
T 2B67
4 ipa : |, Observe 5 divisions of display on the Type 561A CRT.
Position Midrange
Time/div Calibrated m. Push the Trace Restorer button (the red button con-
Pull 5X Mag Pushed in centric with the POSITION knob).
N
rece a n. Note that the square wave display disappears into a
2 straight line.
Slope +
Coupling AC Fast o. Release the Trace Restorer button and note that the
Source Int square wave display returns.
NOTES
6-26