Output Impedance Check; Ripple And Noise Check; Current Limit Check; Power Supply Voltage Checks - HP 467A Operating And Service Manual

Model 467A
TEST OSCI L LATOR
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467A-B-020�B
c. Connect capacitor and oscilloscope to Model
467A OUTPUT. Output waveform should be
stable (no oscillations or ringing present) .
5-1B. RIPPLE AND NOISE CHECK .
a. An AC Voltmeter (-hp- Model 331A) will be
required for this operation. Connect AC Volt­
meter to Model 467A output. Set
0.003 V.
b. Set Model 467A to SUPPLY ± 20; VOLTS ADJ
fully CW(+20. 00 V). Short Model 467A INPUT.
c. AC Voltmeter should read less than 1. 77 mV
rmS (5 mV peak-to-peak ) .
d. Rotate AMPLIFIER/SUPPLY switch to AM­
P LIFIER XlO.
e. AC Voltmeter should still read less than 1.77
mV rms (5 mV peak-to-peak) .

5-19. CURRENT LIMIT CHECK .

a. A DC Milliammeter (-hp- Model 42BB) and a
DC Voltmeter ( -hp - Model 3440A/3444A) will
be required. Set the 467A to SUPPLY ±20,
and adjust the VOLTS ADJ until an output volt­
age of 0.000 volts is obtained, using the dc
voltmeter.
461A-B-0206S
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Figure 5-4. Output Impedance Check
RANGE to
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Figure 5-5. Current Limit Check
AC VOLTMETER
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b. Short the 467 A output and connect the 42BB,
set on the 1 A range, as shown in Figure 5-5.
As the VOLTS ADJ is varied slowly, the 42BB
should show an increasing current that is
always less than BOO mA.

5-20. POWER SUPPLY VOLTAGE CHECKS.

a. A DC Voltmeter (-hp- Model 3440A/3444A)
will be required for this check.
b. Connect DC Voltmeter between point desig­
nated in Table 5-5 and circuit ground. Volt­
meter should display readings as indicated.
Table 5-5. Power Supply Voltage Checks
Connect DC Voltmeter
Between Circuit
Ground and
J2, Pin 7
J2 , Pin 2
J1, Pin 3
J1, Pin 4
Cathode of CR147
Anode of CR123
+ side of C111
J2, Pin 1
CL IP-ON
DC AMMETER
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5-5
Section V
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POWER AMPLIFIER
DC Voltmeter
Readings
-32.5 to -35.7 V
+32.2 to +36.0 V
+ 7 V
- 7 V
+15 V
-15 V
+50 V
-50 V
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