HP 974A, User Manual, Page: 18 / 27

AC + DC Voltage (rms responding, computed from acV, dcV)
Range Resolution
Accuracy
DC, 20 Hz to
10 kHz
DC, 10 kHz to
30 kHz
DC, 30 kHz to
50 kHZ
DC, 50 kHz to
100 kHz
5 V 1 mV
±
(1% + 30)
±
(1.2% + 40)
±
(2.5% + 70)
±
(3.5% + 300) 50 V 10 mV
500 V 100 mV
750 V 1 V
±
(1% + 30)
DC, 20 Hz to 1 kHz
Not Specified
Measurement range:
500 mV to 500 V ranges 20 Hz to 30 kHz 5% to 100% of range
30 kHz to 100 kHz 10% to 100% of range
750 V range 75 V to 750 V
Response time: < 2 seconds for AC, 5 seconds for AC+DC on fixed range
Crest factor: <3
Common Mode Rejection Ratio (CMR) 1 k
Ω
imbalance: > 60 dB @ DC to 60 Hz
DC Current, AC Current (40 Hz to 1 kHz), 5% to 100% of range
Range Resolution
DC Current
Accuracy
AC Current
Accuracy
Input
Resistance
Maximum
Input
500
µ
A 10 nA
±
(0.3% + 2)
±
(1% + 20)
< 1050
Ω
0.5 A (fused) 50 mA
1
µ
A < 12
Ω
500 mA
10
µ
A < 2.5
Ω
10 A 1 mA
±
(0.7% + 2) < 0.05
Ω
15 A (fused)
Specifications
1-18