Agilent / Keysight 8665A High-Performance Signal Generator, 4.2 GHz
Agilent / Keysight Signal Generators. Frequency Range: 100 kHz to 4.2 GHz, Power Range (dBm): −140 dBm to +13 dBm.
- Model
- Agilent / Keysight 8665A
- Calibration
- Available on request
- Price
- $2,894
- Status
- In stock
- RFQ ref
- 8665A
This unit
The Agilent/Keysight 8665A is a synthesized signal generator delivering precise RF signal generation from 100 kHz to 4.2 GHz. Built for R&D, manufacturing, and laboratory environments, it combines broad frequency coverage with advanced modulation flexibility and exceptional phase noise performance. Though no longer manufactured by Keysight, the 8665A remains in service across demanding metrology and receiver testing applications.
Technical Specifications
Frequency Range- 100 kHz to 4.2 GHz
- 0.01 Hz frequency resolution Output Power
- −140 dBm to +13 dBm
- Leveled RF output at +13 dBm Modulation Capabilities
- AM, FM, and PM
- FM rates to 2 MHz with deviations to 20 MHz
- AM range: 0% to 100%
- Optional pulse modulation (Option 008): pulse width and delay adjustment 50 ns to 999 ns; rise/fall times 80 dB Phase Noise & Spurious
- SSB phase noise < −140 dBc/Hz typical at 20 kHz offset at 1 GHz (with Option 004)
- Nonharmonic spurious < −100 dBc to 2 GHz Reference & Stability
- Internal 10 MHz reference oscillator
- Option 001: high-stability time base with Electronic Frequency Control (EFC)
Key Features
- Frequency sweep capability
- Internal modulation source
- 50 Ohm impedance output
- HP-IP (IEEE-488) interface for instrument control and data acquisition
- Configurable rear panel I/O (Option 003)
- Low-noise enhancement for out-of-channel receiver testing and clock applications (Option 004)
- Selectable rack configurations: flange kits with or without handles; front handle kit available
Typical Applications Receiver sensitivity and selectivity characterization; clock source applications requiring low phase jitter; RF component testing and validation; modulation index and deviation verification; swept frequency measurements.
Compatibility & Integration The 8665A is obsolete and no longer supported by Keysight. Replacement parts and service support are available through third-party test equipment suppliers. Operating and calibration documentation is obtainable from secondary sources.
Specifications
| Parameter | Value |
|---|---|
| Frequency Range | 0.1 MHz to 4200 MHz | Power Range (dBm): '-139.9 dBm to +13 dBm | Voltage / Current Range: '-10%), 100, 120, 125 VA maximum, 220, or 240 Vac (±5% |
Agilent / Keysight 8665A — Repair & Calibration Service
Aumictech offers NIST-traceable calibration and repair for the Agilent / Keysight 8665A. Calibration covers output frequency accuracy, output power level accuracy across the full frequency range, AM/FM/PM/pulse modulation accuracy, harmonic and spurious output levels, and phase noise floor verification. All calibrations ship with a NIST-traceable certificate. Turnaround is typically 1–3 business days after receipt.
Common Agilent / Keysight 8665A faults: YIG oscillator failure (no output or loss of lock), step attenuator wear (output drops or steps at set attenuation), ALC loop failure (uncontrolled output power), I/Q modulator assembly failure. HP/Agilent 836xx series most common faults are YIG oscillator failure and step attenuator contact wear causing output steps or drops at specific attenuation settings. Keysight E4428C/E4438C units most commonly develop ALC loop failure and I/Q modulator assembly faults. YIG oscillator replacement and attenuator service are stocked repairs.
Agilent / Keysight 8665A price
This Agilent / Keysight 8665A is listed at $2,894.38. Calibration is available separately from $450. Contact us for volume pricing or if you need multiple units.
Agilent / Keysight 8665A calibration cost
NIST-traceable calibration for the Agilent / Keysight 8665A is $450 (standard — pass/fail certificate and calibration sticker) or $650 (full measured data at every test point, reference standards documented, traceability chain included). Calibration for this instrument covers output frequency accuracy, output power level accuracy across the full frequency range, AM/FM/PM/pulse modulation accuracy, harmonic and spurious output levels, and phase noise floor verification. Turnaround is 1 to 3 business days after receipt. See full calibration details →
