Tektronix 434 User Manual

Calibration—434
n. Position the top of the display to the bottom grati
cule line.
o. CHECK—CRT display fo r aberrations typically less
than +4%, —4%, or a total of 6% peak to peak.
p. Connect the negative-going fast-rise output of the
Square-Wave Generator to the CH 2 input connector.
q. Adjust the Square-Wave Generator for a six division
display.
r. Set TRIGGER SLOPE to — and obtain a stable dis
play.
s. Position the bottom of the display to the top of the
graticule.
t. CHECK—CRT display for aberrations typically less
then +4%. —4%, or a total of 6% peak to peak.
u. Remove the Square-Wave Generator signal from the
CH 2 input connector and connect it to the CH 1 input
connector.
v. Set the Vertical Mode to CH 1 and position the
bottom of the display to the top of the graticule.
w. CHECK—CRT display for aberrations typically less
than +4%, —4%, or a total of 6% peak to peak.
x. Reconnect the positive-going fast-rise output from
the Square-Wave Generator to the CH 1 input connector
and set the TRIGGER SLOPE switch to +.
y. Set the CH 1 V O LTS/DIV switch to 5 mV.
z. Adjust the Square-Wave Generator for a six-division
display.
aa. V ertically center the display using the CH 1 POSI
TION control.
ab. CHECK—CRT display in 1 mV, 2 mV, and 5 mV
positions of the CH 1 and CH 2 V O LTS/DIV switches.
Refer to Table 5-3. Use the 10X BNC attenuator as neces
sary to maintain a six-division display amplitude.
TABLE 5-3
Amplifier Compensation
VOLTS/DIV
Switch Setting
Compensation
Adjustment
Typical
Aberration
5 mV C225 in Channel 1
C325 in Channel 2
Less th a n +2%,
-2 % , total of 2%
peak to peak.
2 mV
C223 in Channel 1
C323 in Channel 2
1 mV
C220 in Channel 1
C320 in Channel 2
Less th a n +3%,
-3 % , total of 3%
peak to peak.
ac. ADJUST—Refer to Table 5-3 fo r the correct adjust
ment and tolerances. See Fig. 5-9 for adjustment locations.
ad. Disconnect all test equipment.
26. Check Vertical A m plifier Bandwidth
a. Connect the output of the Medium-Frequency
Constant-Am plitude Signal Generator to the CH 1 input
connector via a GR to BNC adapter, a 42-inch 50 Ei BNC
cable, a 10X BNC attenuator, and a 50 £2 BNC termination.
b. Set both V O LTS/D IV switches to 10 mV, the Ver
tical Mode to CH 1, and the TRIGGER LEVEL control
fu lly clockwise.
c. Adjust the signal generator output am plitude for a
six-division display of the 50 kilohertz reference frequency.
d. W ithout changing the output amplitude, increase the
output frequency until the display is reduced to 4.2 divi
sions.
e. CHECK—Output frequency of the signal generator
must be at least 25 megahertz.
f. Repeat this bandwidth check procedure for all posi
tions listed in Table 5-4. Check both Channel 1 and
Channel 2.
®
5-19

Tektronix 434 Specifications

General

Brand	Tektronix
Model	434
Category	Test Equipment
Language	English