10
Specifications
All specifications are common
to the Agilent 4284A and Agilent 4285A
unless otherwise noted.
Measurement functions
Measurement parameters
|Z| (impedance), |Y| (admittance), q (phase), R (resistance), X (reactance),
G (conductance), B (susceptance), L (inductance), C (capacitance), Q (quality factor),
D (dissipation factor), ESR (equivalent series resistance) and Rp (parallel resistance).
20 parameter combinations are available
Equivalent circuit modes: Series and parallel
Mathematical functions: Deviation and percent deviation
Trigger: Internal, external and manual
Delay time: 0 to 60.000 s in 1 ms steps
Measurement terminals: Four-Terminal Pair
Test cable lengths:
Agilent 4284A-standard: 0 and 1 meter
Option 4284A-006: adds 2 and 4 meter extension
Agilent 4285A-standard: 0.1 and 2 meters
Integration time: Short, medium and long
Test signal
Test frequency:
Agilent 4284A: 20 Hz to 1 MHz, 8610 selectable frequencies
Agilent 4285A: 75 kHz to 30 MHz, 100 Hz steps
Frequency accuracy: ±0.01%
Output impedance:
Agilent 4284A: standard: 100 Ω ±3%
Option 4284A-001: 100 Ω ±6%
Agilent 4285A: (25 + 0.5 f
m
) Ω ±10% @ 1 MHz, ±30% @ 30 MHz,
f
m
= test frequency in MHz
AC test signal modes:
Normal: Programs selected voltage or current at the measurement
terminals when they are opened or shorted, respectively.
Constant: Maintains selected voltage or current at the device
under test independent of changes in the device’s
impedance.
AC test signal
Agilent 4284A: standard
Range Accuracy
Normal V 5 m Vrms to 2 Vrms ±(10% + 1 mVrms)
I 50 µArms to 20 mArms ±(10% + 10 µArms)
Constant V 10 m Vrms to 1 Vrms ±(6% + 1 mVrms)
I 100 µArms to 10 mArms ±(6% + 10 µArms)
Agilent 4284A with Option 4284A-001
Range Accuracy
Normal V 5 m Vrms to 20 Vrms ±(10% + 1 mVrms)
I 50 µArms to 200 mArms ±(10% + 10 µArms)
Constant V 10 m Vrms to 10 Vrms ±(10% + 1 mVrms)
I 100 µArms to 100 mArms ±(10% + 10 µArms)
Specifications continued on page 11
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