Keysight (Agilent)
Keysight (Agilent) 4285A
75KHz-30MHz Precision LCR Meter
75 kHz to 30 MHz Frequency Range
C, L, R, Z, Y, G, B, D, Q, θ, Vac, Iac, Vdc, Idc Measurement Parameters
0.1% Basic Accuracy
5 mV to 2 V RMS Test Signal Level (Voltage)
200 µA to 20 mA RMS Test Signal Level (Current)

| Attribute | Value |
|---|---|
| Frequency Range | 75 kHz to 30 MHz |
| Measurement Parameters | C, L, R, Z, Y, G, B, D, Q, θ, Vac, Iac, Vdc, Idc |
| Basic Accuracy | 0.1% |
| Test Signal Level (Voltage) | 5 mV to 2 V RMS |
| Test Signal Level (Current) | 200 µA to 20 mA RMS |
| DC Bias Voltage | 0 to ±40 V (internal), up to ±2 kV (external) |
| DC Bias Current | 0 to ±100 mA (with 42841A bias current source) |
| Measurement Time | Fast: 4.5 ms, Medium: 15 ms, Slow: 120 ms (typical) |
| Interface | GPIB (IEEE-488) |
| Power Requirements | 90–132 V / 198–264 V AC, 47–63 Hz, 150 VA maximum |
Keysight Technologies 4285A Options:
- 4285A - 700 - No DC bias
- 4285A - 001 - 40V dc bias (power amplifier/dc bias)
- 4285A - 002 - Accessory control interface/bias current (cannot be operated simultaneously with Option 4285A-001)
- 4285A - 004 - Memory card
- 4285A - 1A7 - ISO 17025 compliant calibration
- 4285A - 201 - General purpose handler interface
- 4285A - 202 - Specific handler interface
- 4285A - 301 - Scanner interface
- 4285A - 710 - Blank panel
- 4285A - 915 - Add service manual
- 4285A - ABJ - Add Japanese operation manual
- 4285A - ABA - Add English operation manual
- 4285A - 907 - Front handle kit
- 4285A - 908 - Rack mount kit
- 4285A - 909 - Rack flange and handle kit
| Model | 4285A |
|---|
The Keysight (Agilent) 4285A LCR Meter delivers precision and speed for RF component and material measurement with a frequency range of 75 kHz to 30 MHz in 100 Hz steps. Designed for high-performance testing, it ensures 0.1% basic accuracy and fast 30 ms measurement time. The 4285A supports both constant voltage and current signal levels, with additional features including 10 A DC bias capability when used with the 42841A, and list sweep measurement functionality, ideal for evaluating component behavior across frequency ranges.
Suitable for R&D, manufacturing, QA, and inspection tasks, the 4285A meets rigorous industry demands for high-frequency LCR testing.
Testwall can supply the used Keysight (Agilent) 4285A, fully tested. With expert support and global delivery, Testwall ensures high-performance instrumentation with unmatched reliability and service quality. Please contact us directly if you need calibration or repair of the Keysight (Agilent) 4285A.





