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Section V
b.
Adjust A13C19 X1K RANGE ADJ for output
frequency of 10 kHz.
5-37.
X10K RANGE ADJUST (A13C6).
a.
With same setup as used for 5-33 set
RANGE switch to X1OK and FREQUENCY
dial to "10".
b.
Adjust A3C6, 100 kHz Dial calibrate adjust
for an output frequency of 100 kHz.
5-38.
DISTORTION ADJUST (A14R17 AND A14R29).
a.
Test
equipment
Analyzer (-hp- Model 331A.)
b.
Connect
distortion analyzer and set Model 3300A
controls as follows:
FREQUENCY dial ......................1
RANGE switch............................X1K
CHANNEL A function .................SINE
c.
Adjust A14R17, UPPER SINE ADJ and
A14R29 LOWER SINE ADJ for minimum
distortion.
d.
Distortion should be < 1%.
5-39.
DC OUTPUT LEVEL ADJUST (A15R7 AND
A16R7).
a.
Test equipment required: DC Voltmeter (-
hp- Model 3440A) and RC Filter see Figure
5-6, page 5-5.
b.
Connect CHANNEL A OUTPUT to DC
Voltmeter through a filter as shown in
Figure 5-6.
c.
Set 3300A controls as follows:
RANGE switch............................X100
FREQUENCY dial ......................10
CHANNEL A Function ................Vary
CHANNEL A AMPLITUDE .........Max. CW
d.
Check dc output level on all three functions.
Adjust A15R7 DC LEVEL ADJ for minimum
voltage on all functions. DC levels should
be +200 mV.
Compromise
A15R7 so that all functions are as
close to zero volts as possible.
5-40.
Repeat 5-39 on CHANNEL B, and adjust
A16R7 DC LEVEL ADJ.
5-41.
SQUARE
WAVE
A16C2).
a.
Test equipment required: Oscilloscope (-hp-
Model 175A) and 10:1 Probe. (-hp- Model
10001A).
required:
Distortion
CHANNEL
A
OUTPUT
NOTE
the
adjustment
of
ADJUST
(A15C2
b.
c.
CHANNEL A function................. SQUARE
FREQUENCY dial ...................... 10
RANGE switch ........................... X10K
d.
5-42.
Repeat 5-41 on CHANNEL B, and adjust
A16C2 SQUARE WAVE ADJ.
5-43.
REPAIR PROCEDURES.
to
5-44.
SERVICING ETCHED CIRCUIT BOARDS.
5-45.
The Model 3300A has six etched circuit boards.
Use caution when removing them to avoid damaging
mounted components.
assembly is marked on the circuit board to identify it and
on the appropriate schematic. Refer to Section VII for
replacement -hp- Part No's. The etched circuit boards
are of the plated-through type. The electrical connection
between the two sides of the board is made by a layer of
metal plated-through the component hole.
working on these boards, observe the following rules:
a.
b.
EXCESSIVE HEAT CAN CAUSE THE
CIRCUIT AND BOARD TO SEPARATE,
OR
COMPONENTS.
c.
d.
AND
e.
5-6
Connect the CHANNEL A OUTPUT to the
oscilloscope using the 10:1 Probe.
Set 3300A controls as follows:
Adjust A15C2 SQUARE WAVE ADJ for
minimum rise time with less than 5%
overshoot on the square wave. Rise time
should be < 250 n sec.
The -hp- Part No.
Use a low-heat (25 to 30 watts) small-tip
soldering iron, and a small diameter rosin
core solder.
Remove circuit components by placing the
soldering iron on the component lead on
either side of the board, and pulling up on
the lead.
If a component is obviously damaged, clip
leads off as close to the component as
possible and then remove leads with a
soldering iron.
CAUTION
CAUSE
DAMAGE
Clean component lead hole by heating the
hole with the iron and inserting a wooden
toothpick. Remove the toothpick after the
solder has cooled and insert the new
component lead.
Shape the new components leads and
insert them in lead holes.
soldering iron and add a small amount of
new solder as required to insure a good
electrical connection.
Clean excessive flux from the connection
and adjoining area.
Model 3300A
for the
When
TO
THE
Reheat with
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Troubleshooting
