Stanford Research CG643 – PECL (+5Vcc) up to 2050MHz
Stanford Research Systems Signal Generators. Resolution: 16 digits, Resolution: 1° for frequencies above 200 MHz, Sensitivity: 1 ns/V.
- Model
- Stanford Research Systems CG643
- Calibration
- Available on request
- Price
- $450
- Status
- In stock
- RFQ ref
- CG643
This unit
The Stanford Research CG643 is a synthesized clock generator delivering PECL (+5Vcc) signals up to 2050 MHz for high-speed digital systems, communication networks, and test and measurement applications. This instrument combines exceptional frequency stability with flexible programmability, enabling precise clock edge positioning and dynamic timing control in demanding research and engineering environments.
Technical Specifications
Output Performance- Output signal type: PECL (+5Vcc)
- Maximum output frequency: 2050 MHz
- Complementary square wave outputs
- Jitter (rms): Less than 1 ps across operational frequency range
- Transition time (rise/fall): 80 ps (20% to 80%)
- Frequency resolution: 16 digits Timing and Control
- Phase resolution: 1° for frequencies above 200 MHz
- Time modulation range: ±5 ns via rear-panel input
- Modulation sensitivity: 1 ns/V
- Modulation bandwidth: DC to over 10 kHz
- Configuration memory: 10 non-volatile storage slots Connectivity and References
- 10 MHz reference input (rear panel)
- 10 MHz reference output (rear panel)
- Accessory power: +5 V and −5 V (rear panel)
- Control interfaces: GPIB and RS-232 Power Supply
- Universal input AC power for worldwide operation
Key Features
- High-precision PECL differential signaling for noise-immune clock distribution
- Sub-picosecond jitter performance for timing-critical applications
- Phase adjustment with 1° resolution above 200 MHz for exact clock edge positioning
- Dynamic time modulation capability enabling real-time timing adjustments
- Instant configuration recall from ten stored presets via memory function
- Accessory power outputs supporting remote clock receiver modules via Category-6 cable
Optional Accessories
- Clock receiver modules for complementary high-speed transitions at standard logic levels on SMA connectors
- PRBS generator for random data pattern generation
- Multiple output types available including CMOS, ECL, LVDS, and RF through accessory modules
Typical Applications High-speed digital system synchronization, precision timing for communication networks, test and measurement instrument synchronization, and phase-coherent multi-channel signal generation in research laboratories.
Specifications
| Parameter | Value |
|---|---|
| Frequency Range | DC to 2050 MHz | Voltage / Current Range: '+5 V and −5 V accessory power |
Stanford Research Systems CG643 — Repair & Calibration Service
Aumictech offers NIST-traceable calibration and repair for the Stanford Research Systems CG643. 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 Systems CG643 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 Systems CG643 price
This Stanford Research Systems CG643 is listed at $450. Calibration is available separately from $450. Contact us for volume pricing or if you need multiple units.
Stanford Research Systems CG643 calibration cost
NIST-traceable calibration for the Stanford Research Systems CG643 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 →
