Tektronix 1A5 Instruction Manual page 76

Calibration — Type 1A5
Type 1A5 Controls
A Input AC-GUD-DC
B Input AC-GUD - DC
VOLTS / CM
VARIABLE
DISPLAY
Type 544 Oscilloscope Controls
Triggering Mode
Triggering Slope
Triggering Coupling
Triggering Source
Time/cm
Variable
Horizontal Display
S q uare Wave Generator
Hi Amplitude/Fast Rise
R ep etition R a te R a nge
Multiplier
Hi Amplitude Output
×1
14. Adjus t I npu t Ca
C208)
a. Eq u i p m pn t set up is sh ow
adjustments is given in Fig. 6-16 (A). Typical waveforms are
shown i n Fig. 6-16 (B), (C), (D) and (U).
6-16
Fig. 6-15. E qui pment se
DC
G N D
20 mV
CAL
A-B
Auto S ta bility
+
AC
Uorm
.2 ms
Cal
Uorm ( × 1 )
Hi Amplitude
1 kHz
CCW
pacitance (C1 08,
n i n F i g. 6-15 . Locat i on n f
t up for steps 14 and 16.
b. Connect the following equipment to the A INPUT con-
ne c t or in the sequence given:
20 pF Input RC Normalizer (item 17)
50 Ω GR-to-BUC Termination
5 ns GR Cable
10:1 50 Ω GR Attenuator
Type 106 Square Wave Generator — Hi Amplitude Output
c. S e t t he Square Wave Generator controls as follows:
Hi Amplitude Fast Rise
R e pe t ition R a te R a nge
Multiplier — fu l ly CCW
Amplitude — fully CCW
d. Set the osc i llosc o pe Tim
Triggering Source to Norm.
e. Set the A Input AC-G N D-DC s
f. Adjust the Squ a re Wave Generator Amplitude control
to provide a 5 cm vertical display. Adjust POSITION control
as neces sa ry to obtain a centered display. Adjust Triggering
Level as necess a ry to obtain a triggered sweep.
g. CHECK — O ptimum
upper left corner of the s
tion. See F i g. 6-16 .
— Hi Amplitude
— - 1 kHz
e /cm control to . 2 ms and the
w itch to DC.
sq uare c orner a nd flat top at the
q u a re wave. ½ mm or less aberra ­