Stanford Research CG641 – CMOS (+3.3Vcc) up to 500MHz
Stanford Research Signal Generators. Model: CG641.
- Model
- Stanford Research CG641
- Calibration
- Available on request
- Price
- $350
- Status
- In stock
- RFQ ref
- CG641
This unit
The Stanford Research CG641 is a CMOS clock generator delivering precision timing signals up to 500 MHz, powered by a single +3.3Vcc supply. The device outputs CMOS-level signals with 50 Ω output impedance designed for driving high-impedance loads across any length of 50 Ω coaxial cable. Transition times remain below 1 ns, enabling clean, fast clock edges for demanding synchronization requirements.
Technical Specifications
- Maximum Frequency: 500 MHz
- Output Type: CMOS
- Power Supply: +3.3Vcc
- Output Impedance: 50 Ω
- Transition Times: Less than 1 ns
- Chassis Ground: Available
Key Features
- Single +3.3 V supply simplifies integration into modern digital systems
- 50 Ω output impedance for controlled signal distribution via coaxial interconnects
- Sub-nanosecond transition times ensure minimal timing jitter
- Front-panel CMOS output connector for direct instrument access
Typical Applications The CG641 serves precision clock distribution in test benches, digital design validation, and laboratory measurement setups requiring stable, low-jitter reference signals at frequencies to 500 MHz.
Compatibility & Integration Optional line receiver modules (CG640 to CG649 series) expand the CG641's functionality by providing complementary logic outputs on SMA connectors. These receivers accept independent ±5 VDC power delivered via rear-panel RJ-45 connector, allowing flexible multi-output configurations without additional external supplies.
Specifications
| Parameter | Value |
|---|---|
| Frequency Range | DC to 500 MHz | Voltage / Current Range: '+3.3Vcc |
Stanford Research CG641 — Repair & Calibration Service
Aumictech offers NIST-traceable calibration and repair for the Stanford Research CG641. 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 Stanford Research CG641 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.
Stanford Research CG641 price
This Stanford Research CG641 is listed at $350. Calibration is available separately from $450. Contact us for volume pricing or if you need multiple units.
Stanford Research CG641 calibration cost
NIST-traceable calibration for the Stanford Research CG641 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 →
