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SECTION 3
Service Informafion
the verification procedures outlined in Sec-
tion 1 to verify that the instrument is operat-
ing properly.
3.3.3
Line Power
Before calibrating the instrument, be sure the rear panel
line voltage is s& to the correct operating voltage: The
Model 3930A should be calibrated while operating at a
line voltage within 10% of the line voltage switch setting
and at a line frequency from 48Hz to 62Hz.
3.3.1
Environmental
Conditions
Calibration should be performed at 18-28'C (65-82'F)
and at less than 70% rekive humidity.
3.3.2
Initial Conditions
3.3.4
Recommended Calibration
Equipment
The Model 3930A and the test equipment should be
stabihzaiik.
turned on and allowed to warm up for one hour before
calibration. If the instrument has been subjected to ex-
treme temuerature or humidity, allow additional time for
rable.
Table 3-2 summarizes recommended equipment for cali-
brating the Model 3930A. Similar equipment may be
used as long
as
corresponding specifications are compa-
Table 3-2. Recommended Test Equipment for Calibration
1 Manufacturer
Model
Description
Specifications
Keithley
197A
DMM (DC volts, AC volts)
20V range; zt(O.O15% of rdg + 3 counts)
(5-l/2 digits)
ACV; 30.35% of rdg + 100 counts)
Fluke
8920A
DVM (AC volts) (3-l /2 digits)
Philips
Keithley
Keithley
PM6654C
Timer/Counter
PM9678
TCXO option
3930A
Multifunction
Synthesizer
7051-2
BNC Interconnect Cable
Keithley
7755
1468
5022 Feed-through Terminator
I Pomona
20V range; lkHz-ZOOkHz (0.5% of rdg), 2OOkHz-
ni4J3.2 (0.7%), l-lOMH2 (3%), lo-2oMHz (5%)
O.OlHz-12OMHz; time base aging
<l x W7/month; Vp-p measurements
2Vp-p sine wave, ztl % amplitude accuracy
5OSJ coaxial cable (RG-580, male BNC connectors,
2ft (0.6m)
BNC to BNC adapter, 5OS2 termination, DC to
25oMHi, VSWR of 51.1
BNC-banana Adapter
Female BNC connector to double banana plug
3-2
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