Maintenance; Introduction; Performance Checks; Dial Accuracy - HP 3300A Technical Manual

Model 3300A
5-1.

INTRODUCTION.

5-2. This section contains information necessary for
the proper maintenance of the -hp- Model 3300A
Function Generator. The required test equipment is
listed in Table 5-1. Test equipment with comparable
characteristics can be substituted if recommended
equipment is not available.
5-3.

PERFORMANCE CHECKS.

5-4. The performance checks
procedures designed to compare the -hp- Model 3300A
with its specifications. (See Table 1-1). These checks
may be accomplished with either the 3301A Auxiliary
Plug-in or Malfunction Isolating Aid Plug (see Figure 5-7)
installed in the 3300A.
completed before any attempt is made to adjust or
calibrate the instrument.
period before making performance checks.
performance check indicates that the instrument does
not meet specifications refer to the applicable paragraph
in the Adjustment and Calibration procedure contained in
this Section. (See Table 5-5).
5-5.

DIAL ACCURACY.

a. Test equipment
Counter (-hp- Model 5245L).
b. Connect CHANNEL A OUTPUT to the
frequency counter and set the 3300A
control as follows:
CHANNEL A function switch ......... SINE
CHANNEL A AMPLITUDE ............ mid
c. Check frequency with dial at 1 and 10 for
each position of RANGE switch.
d. Accuracy should be * 1% of maximum dial
setting (one minor division) on X.
through X1K ranges, and ± 2%
maximum dial setting (two minor divisions)
on X10K range.
5-6. Since the specification gives % of maximum dial
setting (full scale, the accuracy will always be + 1 or 2
minor divisions at any point on the dial.
5-7.

DISTORTION CHECK.

a. Test equipment
Analyzer (-hp- Model 331A).
b. Connect the OUTPUT of CHANNEL A to
distortion analyzer and set 3300A controls
as follows:
FREQUENCY dial ......................10
RANGE switch............................X1K
CHANNEL A function switch ......SINE
CHANNEL A AMPLITUDE
control.................................mid position
c. Distortion should be less than 1%.
are front
These operations should be
Allow a 30 minute warm-up
required: Frequency
position
required: Distortion
SECTION V

MAINTENANCE

d.
Distortion should be less than 3%.
The sine function is electronically
synthesized
function. Satisfactory performance of
Distortion Check assures symmetry
and triangle linearity.
panel
5-8.

FREQUENCY RESPONSE:

5-9. Test equipment required: Oscilloscope (-hp-
Model 175/1750B).
a.
b.
c.
If a
5-10.

MAXIMUM OUTPUT LEVEL, NO LOAD.

a.
b.
CHANNEL A function switch...... SQUARE
CHANNEL A AMPLITUDE......... Max. CW
c.
5-11. Repeat 5-10 above with CHANNEL A function
switch set to SINE and TRIANGLE. The minimum peak-
to-peak voltage should remain 35 volts.
01
of
5-12. Repeat 5-10 and 5-11 on CHANNEL B.
5-13.

MAXIMUM OUTPUT LEVEL, LOADED.

a.
b.
FREQUENCY dial ...................10
RANGE switch ........................X100
CHANNEL A AMPLITUDE......
CHANNEL A function switch...SQUARE
c.
5-1
Position the RANGE switch to X10K.
NOTE
from the
Set up convenient reference level on
oscilloscope at 1 kHz.
Vary frequency over the entire range except
X10K. Amplitude should vary < ± 1%.
Vary frequency over the X10K range.
Amplitude should vary < + 3%.
Test equipment required: Oscilloscope (-hp-
Model 175A/1750B).
Connect the OUTPUT of CHANNEL A to
Oscilloscope and set 3300A controls as
follows:
The peak-to peak voltage should be > 35
volts over entire frequency range.
Test equipment required: Oscilloscope (-hp-
Model 175A/1750B), 600 ohm, and 50 ohm
resistor, see Table 5-1.
Connect OUTPUT of CHANNEL A and 600
ohm resistor as shown in Figure 5-1. Set
the 3300A controls as follows:
control .............................Max. CW
Peak-to-peak voltage should be > 15 volts.
Section V
triangle