Test Equipment Required; Ac Accuracy And Gain Check; Vmaintenance; Introduction - HP 467A Operating And Service Manual

Model 467A

5-1. INTRODUCTION.

5-2. This section contains information necessary for
the proper maintenance of the -hp- Model 467 A Power
A mplifier /Supply. This section provides the necessary
Performance Checks, Adjustment and C alibration
Procedures, and Troubleshooting Techniques re­
quired to accomplish the above objective.

5-3. TEST EQUIPMENT REQUIRED.

5-4. The test equipment required to perform the
operations outlined in this section is listed in Table 5 - 1.
This table describes the type of instrument required,
critical specifications, type of operation to be con­
ducted' and the recommended model.
model recommended is not available, equipment which
meets or exceeds the critical specifications listed
may be substituted.

5-5. PERFORMANCE CHECKS.

5-6. The performance checks presented in this sec­
tion are front panel procedures designed to compare
the Model 467A with its published specifications.
These operations may be incorporated in periodic
maintenance, post-repair, or incoming quality con­
trol checks. These operations should be conducted
before any attempt is made to adjust or calibrate the
instrument. During these operations, the Model 467 A
power line voltage should be periodically varied ± 10%.
A fifteen minute warm -up period should be allowed
prior to conducting these checks.

5 -7 . POWER AMPLIFIER OPERATIONS.

DC
5-8. GAIN CHECK.
DC
a. A Voltmeter (-hp- Model 3440A/3444A)
DC
and a Standard (-hp- Model 74 1B) are
required for this test.
b. Set the Model 467A to AMPLIFIER X 10.
TES T OSCILLATdR
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467A-B -0622 A
SECTION
MAINTENANCE
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the specific
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POWER AMPLIFIER
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Note: Do not use low Z
adversley effects frequency response.
Figure 5-1.

AC Accuracy and Gain Check

V
c. Connect the
467A INPUT. Adjust the voltage output of
the DC Standard to 1. 000
meter. The output of the 467A should be
10.00 V ±0.3%.
graph 5-27 for proper adjustment.
d. Set the 467A to AMPLIFIER X5. The 467A
output should be 5.000 V ±D. 3%.
e. Set the 467A to AMPLIFIER X2. The 467A
output should be 2.000 V ±O. 3%.
f.
Set the 467A to AMPLIFIER Xl. The 467A
output should be 1. OOOV ±O. 3%.
g. Set the 467A to VAR.; rotate the VAR. GAIN
from fully CCW to fully CW. The 467A out­
put should vary from 0 V to 10V ±O. 3%.
5-9. AC ACCURACY AND GAIN CHECK.
5-1
a. Figure
ed. A Test Oscillator (-hp- Model 65 1B),an
AC Voltmeter (-hp- Model 33 1A and 3440A/
3445A), 40 and 600 ohm loads are re q uired.
Use the 33 1A Voltmeter for the 1( MHz fre·­
q uency. Use a 3440A/3445A with known ac-
. curacy at 400 Hz and 10 kHz.
b. Connect the 600 ohm load resistor across
the 600 ohm OUTPUT
Connect to the INPUT
Set 6 5 1 B ATTENUATOR to 1V and FREQUE
NCY
to 100)cH
c. Connect the 3445A INPUT to the INPUT of
the 4 67A (A in Figure 5- 1). Advance the
AMPLITUDE of the Oscillator until the ac
voltmeter reads 1. OOOV.
d. USing a 4 0
INPUT to the OUTPUT of the 467A (B in
Figure 5- 1).
The ac voltmeter should read 10.00 volts
If
± 1. 0%.
ance, see Paragraph 5 - 30 for adjustment.
467A
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,
Strapped
cable as its capacitance
(50Q)
5-1
Section
DC
Standard output to the Model
V on the dc volt­
If
not, refer to Para­
shows the test setup recommend­
of
the oscillator.
of
the Model 467A.
z .
the
Q load resistor, connect
Set 467A to AMPLIFIER X 10.
the reading is not within toler­
AC VOLT METER
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3 440A 134 45A
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0
V
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3445A