HP 333A Operating And Service Manual page 30

Section V
Model 333A/334A
i.
Connect 100 k52 resistor in series with
333A/334A input.
333A/334A meter indication should be be-
tween 85 mV and 95 mV. This verifies an
input resistance of 1
MSZ
*5% in set level
and distortion functions.
j,
5-17,
CAPACITANCE CHECK
a,
b.
C.
d.
e.
f.
8.
Connect 5052 output of test oscillator, term-
inated in 5051 load, and 10 k52 resistor to
333A/334A
as shown in Figure 5-5. Connect
the resistor lead to the INPUT terminal of
the 333A/334A, and insert the other lead
directly into the 5052 load. Connect the ground
lead from the 333A/334A to the outer shield
of the 50 52 load; do not use an adapter,
as
it
would add capacitance.
Set 333A/334A controls
as
follows:
FUNCTION.
. . . . . . . . .
VOLTMETER
SENSITIVITY..
. . . . . . . . . . .
MAX.
SENSITIVITY VERNIER.
,
. .
,
. .
MAX.
METER RANGE
. . . . . . . . . .
1 VOLT
Set
test
oscillator to 100 Hz and adjust amp-
litude for 333A/334A meter indicationof 1V.
Set a reference on meter of test oscillator
and use amplitude control to maintain
set
reference whenever frequency of oscillator
is varied.
Increase frequency of test oscillator to 540
(455) kHz. 333A (334A) meter indication
should
be 0.707
V or greater. verifying an
input capacitance of 30 (35) pF or less on
1 V range in voltmeter function.
Set 333A/334A METER RANGE switch to
0.1 V range.
Set test oscillator to 100 Hz and adjust amp-
litude for 333A/334A meter indication of 0.1V.
Set
a
reference on meter of
test
oscillator
and use amplitude control to maintain set
reference whenever frequency of oscillator
is varied.
Increase frequency of
test
oscillator to 230
kHz. 333A/334A meter indication should be
70.7
mV or greater, verifying an input
capacitance of 70 pF or less on 0.1 V range
in toltmeter function.
h.
i.
Set 333A/334A FUNCTION switch to SET
LEVEL.
Set test oscillator to 100 Hz and adjust amp-
litude for 333A/334A meter indication o f
0 . 1 V. Set
a reference on meter of test oscil-
lator and use amplitude control to maintain
set reference whenever frequency of oscil-
lator is varied.
Increasefrequencyof
test
oscillator to 230 kHz.
333A/334A meter indication should be 70.7
mV or greater, verifying an input capacitance
of 70 pF or less
in
set level and distortion
functions.
j.
5-18. MINIMUM INPUT LEVEL CHECK
a.
Connect 5051 output
o f test
oscillator, term-
inated in 5052 load, to 333A/334A INPUT
terminals.
Set 333A/334A controls a s follows:
FUNCTION
. . . . . . . . . .
VOLTMETER
SENSITIVITY..
. . . . . . . . . . .
MAX.
SENSITMTYVERNIER..
. . . . .
MAX.
METER RANGE
. . . . . . . .
0 . 3 VOLTS
c.
Set
test
oscillator to 400 He and adjust
amplitude for 333A/334A meter indication
o f 0 . 3
v.
d.
Set 333A/334A FUNCTION switch to SET
LEVEL.
e.
333A/334A should indicate full scale or
greater.
b.
5-19. DC ISOLATION CHECK
a.
Set the 6515A to zero output, and connect
test
equipment to 333A/334A as shown in
Figure 5-6.
[wIInlnOI
REMOVE SHORTING BAR BE-
TWEEN CHASSIS GROUND ( + )
AND
FRAME GROUND ( A
)
ON
333A/334A INPUT TERMINALS.
Set 333A/334A controls a s follows:
FUNCTION.
. . . . . . . . .
VOLTMETER
METER RANGE
. . . . . . . . . .
1 VOLT
b.
DISTORTION ANALYZER
hp
333A/334A
TEST OSCILLATOR
hp
652A
5On FEED-THRU
TERM INATION
0
-
333A-1-1469
5 -6