Stanford Research Systems
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| Brand | Stanford Research Systems |
|---|---|
| Model | SR540 |
| Type | Precision Synchronous Optical Chopper |
| Origin | USA |
| Blade Configurations | 5/6-slot (4–400 Hz), 25/30-slot (400–3700 Hz) |
| Frequency Stability | ±250 ppm/°C (typ.) |
| Phase Jitter | 0.2° rms (50–400 Hz), 0.5° rms (400–3700 Hz) |
| Frequency Resolution & Accuracy | 1 Hz (4-digit LED display) |
| Control Interface | 0–10 VDC analog input (0–100% full scale), manual 10-turn potentiometer with three decade ranges |
| Reference Outputs | Sum (Σ), Difference (Δ), Inner, Outer, 5×Outer |
| Mounting Options | Bolt clamp or 0.75" rod mount |
| Blade Diameter | 4.04" ±0.002" |
| Controller Dimensions (W×H×L) | 196 × 46 × 130 mm |
| Chopper Head Dimensions (W×H×L) | 71 × 53 × 25 mm |
| Cable Length | 1.83 m |
| Power Consumption | 12 W |
| Input Voltage | 100/120/220/240 VAC, 50/60 Hz |
| Warranty | 1 year parts & labor (excl. motor: 90 days) |