Name: Agilent / Keysight 8656A Synthesized Signal Generator, 0.1 to 990 MHz
Brand: Agilent / Keysight
SKU: 8656A
Price: 772.18 USD
Availability: InStock

Agilent / Keysight 8656A Synthesized Signal Generator, 0.1 to 990 MHz

Agilent / Keysight RF Signal Sources. Frequency Range: 0.1 MHz to 990 MHz (10 Hz resolution), Power Range (dBm): +13 dBm to -127 dBm (0.1 dB resolution), Voltage / Current Range: -10%), 100/120/220/240 Vrms (±5%, 125 VA max, 48–440 Hz.

Model

Agilent / Keysight 8656A

Calibration

Available on request

Price

$772

Status

In stock

RFQ ref

8656A

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Agilent / Keysight 8656A Used Agilent / Keysight 8656A Synthesized Signal Generator, 0.1 to 990 MHz

This unit

The Agilent/Keysight 8656A is a synthesized signal generator delivering programmable RF signal generation from 0.1 MHz to 990 MHz with 10 Hz frequency resolution. This instrument combines precise amplitude control (0.1 dB resolution, +13 dBm to -127 dBm output range) with integrated modulation capabilities, supporting both AM and FM modes simultaneously or independently. Frequency switching completes in less than 35 ms to within 100 Hz of the carrier frequency, enabling rapid frequency-agile testing protocols.

The architecture maintains level flatness of ≤1.0 dB across the operating frequency range at 0 dBm output, with absolute accuracy of ±1.0 dB in the 123.5 MHz to 990 MHz band. AM modulation reaches 99% depth with &lt;1.5% distortion at frequencies ≥400 kHz and output levels ≤+7 dBm. FM capabilities span internal rates at 400 Hz and 1 kHz, plus external rates DC to 100 kHz, with harmonic and non-harmonic distortion 0.15 V into 50 Ω) selectable to 1, 5, or 10 MHz.

Compact benchtop form factor (425 mm × 520 mm × 133 mm, 18.1 kg) accommodates lab and field deployment across operating temperatures 0°C to 55°C. Standard power requirements accept 100, 120, 220, or 240 Vrms (±5%, -10%) at 48–440 Hz with maximum consumption of 125 VA.

Specifications

Parameter	Value
Frequency Range	0.1 MHz to 990 MHz (10 Hz resolution) \| Power Range (dBm): '+13 dBm to -127 dBm (0.1 dB resolution) \| Voltage / Current Range: '-10%), 100/120/220/240 Vrms (±5%, 125 VA max, 48–440 Hz

Agilent / Keysight 8656A — Repair & Calibration Service

Aumictech offers NIST-traceable calibration and repair for the Agilent / Keysight 8656A. 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.

Standard Cal

$450

Pass/fail cert + NIST sticker

Cal with Data

$650

Full NIST cert with measured values

Common Agilent / Keysight 8656A 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.

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Agilent / Keysight 8656A price

This Agilent / Keysight 8656A is listed at $772.18. Calibration is available separately from $450. Contact us for volume pricing or if you need multiple units.

Agilent / Keysight 8656A calibration cost

NIST-traceable calibration for the Agilent / Keysight 8656A 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 →

Documents

Agilent / Keysight 8656A Datasheet (PDF)