Model209A
SECTION
V
MAINTENANCE
5-1.
INTRODUCTION.
Table 5-2. Dial Accuracy Check
Section V
5-2. This section contains information necessary for
the maintenance
of
the Model 209A Sine/Square
o
scilla
tor. Included are performance checks,
adjustment
and
calibration procedures, and
troubleshooting procedures.
5-3. The test equipment needed to properly maintain
and service the Model 209A
is
listed in Table 5-1.
If
the recommended model
is
not available, other
equipment may be substituted provided it meets the
required specifications.
5·4.
PERFORMANCE
CHECKS.
5-5. The performance checks presented
in
this
section are designed to compare the Model 209A with
its published specifications. These checks can be used
for incoming inspection, periodic maintenance
checks, and to verify performance after adjustment or
repair. A performance check test card appears at the
end
of
this section which can be used to record the
performance specifications.
5-6.
DIAL
ACCURACY
CHECK.
a.
Connect the Model 209A and the Frequency
Counter
as
shown in Figure 5-1. Set the
counter to measure frequency and check the
Model 209A at the frequencies listed in
Table 5-2 for the tolerances indicated.
b.
If
the above dial accuracy checks fail to
meet the required specifications, refer to the
Adjustment and Calibration Procedure in
this section.
RANGE
FREQUENCY COUNTER
SWITCH DIAL INDICATION
X2
2 4
Hz
+/-0.1
Hz
X2
5
10
Hz
+/-0.3
Hz
X2
20
40
Hz
+/-1.2
Hz
X10
2 20 Hz +/-0.6
Hz
X10 5
50
Hz
+/-1.5
Hz
XlO 20
200
Hz
+/-6
Hz
XlOO
2 200
Hz
+/-6
Hz
X100
5 500
Hz
+/-15
Hz
XlOO
20
2 kHz +/-60 Hz
X1K
2 2 kHz +/-60
Hz
X1K 5 5 kHz +/-150
Hz
X1K 20 20 kHz +/-600
Hz
XlOK 2
20 kHz +/-600
Hz
X10K 5 50 kHz +/-1.5 kHz
X10K 20
200 kHz +/-6 kHz
XlOOK
2 200 kHz +/-6 kHz
XlOOK
5 500 kHz +/-15 kHz
X100K 20 2
MHz
+/-60 kHz
5-7.
FLATNESS
CHECK.
a.
Connect the equipment
as
shown in Figure
5-2.
-----NOTE-----
The BUCKING SUPPLY should be
constructed from the components
listed in Table 5-1. The 500 ohm
control should be used
as
a coarse
adjust and the 50 ohm control
should be used
as
a fine adjust
hp
209A
OSCILLATOR
@
ELECTRONIC COUNTER
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209A-e-1661
Figure 5-1. Dial Accuracy Check
www.HPARCHIVE.com
5-1
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