Agilent/Keysight 8657GMSK
Agilent / Keysight Signal Generators. Resolution: 10 Hz (8657A) or 1 Hz (8657B), Resolution: 0.1 dBm, Accuracy: ±1.0 dB typical (typically ±0.5 dB).
- Model
- Agilent / Keysight 8657GMSK
- Calibration
- Available on request
- Price
- $1,500
- Status
- In stock
- RFQ ref
- 8657GMSK
This unit
The Agilent/Keysight 8657GMSK is a synthesized signal generator engineered for communication testing applications requiring stable, accurate signal generation with integrated GMSK modulation capability. The instrument delivers precise frequency synthesis across a wide operating range with exceptional spectral purity and flexible modulation options for complex waveform generation.
Technical Specifications
Frequency Range & Resolution- 100 kHz to 1.04 GHz (8657A) or 100 kHz to 2.6 GHz (8657B)
- Underrange capability to 10 kHz with uncalibrated output and modulation
- Frequency resolution: 10 Hz (8657A) or 1 Hz (8657B) Output Level
- Range: +13 dBm to –143.5 dBm
- 100 kHz to 1 MHz: +10 dBm to –143.5 dBm
- Resolution: 0.1 dBm
- Level accuracy: ±1.0 dB typical (typically ±0.5 dB)
- Level flatness: ±0.5 dB (100 kHz to 2.06 GHz at 0 dBm setting) Switching Performance
- Frequency switching: <35 ms (30 ms typical at 25 °C) Modulation Capabilities
- AM and FM with DCFM (dc-coupled FM) for digital squelching
- Pulse modulation (8657B): rise/fall times 70 dB on/off ratios (fc <1030 MHz)
- 0.3 GMSK modulation option (Opt. 022)
- Phase modulation available (Option 003) Spectral Performance
- SSB phase noise (CW mode, 20 kHz offset): –124 to –136 dBc/Hz depending on frequency band
- Residual FM (300 Hz to 3 kHz post-detection BW): <1 to <6 Hz across frequency bands
Key Features
- Dual-model architecture supporting 1.04 GHz (8657A) or 2.6 GHz (8657B) maximum frequency
- Integrated GMSK modulation for digital communication protocols
- Excellent phase noise performance across VHF through UHF bands
- Multiple modulation formats within single instrument platform
- Fine resolution frequency tuning to 1 Hz (8657B)
Typical Applications Digital communication receiver testing, modulation fidelity verification, transmitter design validation, and GMSK signal generation for GSM and similar standards-based systems.
Agilent / Keysight 8657GMSK — Repair & Calibration Service
Aumictech offers NIST-traceable calibration and repair for the Agilent / Keysight 8657GMSK. 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 8657GMSK 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 8657GMSK price
This Agilent / Keysight 8657GMSK is listed at $1,500. Calibration is available separately from $450. Contact us for volume pricing or if you need multiple units.
Agilent / Keysight 8657GMSK calibration cost
NIST-traceable calibration for the Agilent / Keysight 8657GMSK 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 →
