Agilent/Keysight N4985A
Agilent / Keysight RF Amplifiers. Frequency Range: 10 MHz to 50 GHz (model-dependent: N4985A-P15 10 MHz–50 GHz; N4985A-P25 2 GHz–50 GHz; N4985A-S30 100 kHz–30 GHz; N4985A-S50 100 kHz–50 GHz), Power Range (dBm): 22 dBm @ 50 GHz; >20 dBm across range; 30 dBm Psat to 10 GHz; 26 dBm P₋₁dB, 29 dBm Psat @ 20 GHz, Voltage / Current Range: Standard AC power supply.
- Model
- Agilent / Keysight N4985A
- Calibration
- Available on request
- Price
- $19,500
- Status
- In stock
- RFQ ref
- N4985A
This unit
The Keysight N4985A series comprises broadband system amplifiers engineered for RF and microwave applications spanning baseband to millimeter-wave frequencies. Each model delivers high gain and output power across its designated frequency range, with self-contained construction powered by standard AC mains. The series accommodates diverse test scenarios: bench-top laboratory characterization, production-line validation, and time/frequency-domain measurements.
Multiple variants
N4985A-P15, N4985A-P25, N4985A-S30, and N4985A-S50 - provide tailored frequency coverage and performance metrics for specific amplification requirements.
Technical Specifications
- Frequency Coverage (model-dependent):
N4985A-P15: 10 MHz to 50 GHz
N4985A-P25: 2 GHz to 50 GHz
N4985A-S30: 100 kHz to 30 GHz
N4985A-S50: 100 kHz to 50 GHz
- Gain: Up to 27 dB at 20 GHz (N4985A-P15, ±2 dB flatness); 30 dB gain to 26 GHz across series variants
- Output Power: - 22 dBm at 50 GHz
Greater than 20 dBm across frequency range - 1 W (30 dBm) Psat to 10 GHz - 26 dBm P₋₁dB and 29 dBm Psat at 20 GHz
Key Features
- Built-in bias power supplies eliminate external supply dependencies
- Compact form factor enables close placement to device under test or fixture
- Self-contained design integrates into existing benchtop or automated test setups
Typical Applications
- Saturated RF amplifier characterization
- Traveling Wave Tube (TWT) amplifier drive stages
- Antenna system amplification and R&D
- RF source amplification and mixer local oscillator chains
- Noise figure measurement (LNA and full-system configurations)
- Pulse and time-domain amplification
- Digital communication system validation
- General-purpose RF gain blocks
Compatibility & Integration Optional optical application tuning modules
N4985A-OA3 (S30 option) and N4985A-OA5 (S50 option) - extend flexibility for specialized measurement environments. Standard AC power connection ensures straightforward deployment in laboratory and production facilities.
Specifications
| Parameter | Value |
|---|---|
| Frequency Range | 10 MHz–50 GHz, 100 kHz to 50 GHz (variant dependent: 100 kHz–30 GHz, 100 kHz–50 GHz, 2 GHz–50 GHz) | Power Range (dBm): 30 dBm Psat (to 10 GHz) |
| 22 dBm (50 GHz) | Voltage / Current Range | 9 V @ 1.5 A (N4985A-P25) |
Agilent / Keysight N4985A — Repair & Calibration Service
Aumictech offers NIST-traceable calibration and repair for the Agilent / Keysight N4985A. All calibrations are performed to NIST-traceable standards and ship with a certificate. Turnaround is typically 1–3 business days after receipt.
Agilent / Keysight N4985A price
This Agilent / Keysight N4985A is listed at $19,500. Calibration is available separately from $450. Contact us for volume pricing or if you need multiple units.
Agilent / Keysight N4985A calibration cost
NIST-traceable calibration for the Agilent / Keysight N4985A is $450 (standard — pass/fail certificate and calibration sticker) or $650 (full measured data at every test point, reference standards documented, traceability chain included). Turnaround is 1 to 3 business days after receipt. See full calibration details →
