Table of Contents
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 t or.
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.
- - - - - N O T E - - - - -
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
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ELECTRONIC COUNTER
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209A-e-1661
Figure 5-1. Dial Accuracy Check
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5-1
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