HP 3455A Operating And Service Manual page 42

Section IV
TEST OSCILLATOR
hp 652A
OC STANDARD
SYSTRON DONNER MODEL MIO6A
2455+0-4736.
PROCEDURE:
Model 3455A
DIGITAL _VOLTMETER
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THERMAL CONVERTER™
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MODEL @8S5AB DC
DIFFERENTIAL VOLTMETER
"hp MODEL 1O5IA or
11004 (3V) or
equivalent
Apply accurate de voltage {1 V or 3 V) from DC Standard to
Thermal Converter and adjust DC Differentia} Voltmeter for
null. Disconnect the DC Standard and apply the Test Oscillator
autput to both the Therma! Converter and the 3455A. Adjust
the Test Oscillator output level for a null indication on the DC
Differential Voltmeter. This makes the rms value of the ac input
to the 3455A equal to the highly accurate output of the DC
Standard. Repeat this procedure each time the Test Oscillator
frequency is changed.
Figure 4-3. AC/DC Thermal Transfer Measurement (Alternate Frequency Response Test).
a. Set the 3455A controls as follows:
FUNCTION. oes ves ca vewesae cates ACV
RANGE (ces trad ieee avecnedeass 1vV
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INPUT SELECT ............... FRONT
b. Set the AC Calibrator for an output of 1 V, 30 Hz
(745A 1 V range). Set the AC Calibrator's error
measurement control to offset the 1 V, 30 Hz error in-
dicated on the calibration chart (745A 0.1 error range).
¢. Connect the output of the AC Calibrator to the
3455A front panel INPUT.
d. 1. Standard Model 3455A: The 3455A 1 V, 30 Hz
reading should be within the Test Limits listed
in Table 4-4,
2. 3455A Option 001: The 3455A 1 V, 30 Hz
(ACV) reading should be within the Test Limits
listed in Table 4-6.
e. 1. Standard Model 3455A: Using the AC
46
Calibrator, verify the 3455A ac voltmeter ac-
curacy for each Test Frequency, Input Level
and 345S5A Range listed in Table 4-4. The
3455A display readings should be within the
Test Limits given in the table.
2. 3455A Option 001: Using the AC Calibrator,
verify the 3455A ac voltmeter accuracy for each
Test Frequency (ACV), Input Level and 3455A
Range listed in Table 4-6. The 3455A display
readings should be within the Test Limits given
in the table.
f. Set the 3455A FUNCTION to FAST ACV.
g. 1. Standard Model 3455A: Using the AC
Calibrator, verify the 3455A ac voltmeter ac-
curacy (Fast ACV) for each Test Frequency
above 10 kHz, each Input Level and 34554
Range listed in Table 4-4. The 3455A display
readings should be within the Test Limits given
in the table.
2. 3455A Option 001: Using the AC Calibrator,