{"product_id":"stanford-research-sr540","title":"Stanford Research SR540 Optical Chopper","description":"\u003cp\u003e\u003cstrong\u003eStanford Research SR540 Optical Chopper\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe SR540 Optical Chopper is designed to handle all your optical chopping requirements - from simple measurements to dual-beam and intermodulation experiments. The SR540 has a 4-digit frequency display, front-panel frequency control, analog voltage frequency control and two reference outputs with selectable operating modes. Two anodized aluminum blades are provided: a 5\/6 slot blade for frequencies up to 400 Hz, and a 25\/30 slot blade for frequencies up to 3.7 kHz. Reference outputs are provided for frequencies corresponding to each row of slots, as well as the sum and difference frequencies.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eChop frequency: 4 Hz to 400 Hz (5\/6 slot blade), 400 Hz to 3.7 kHz (25\/30 slot blade)\u003c\/li\u003e\n\u003cli\u003eFrequency stability: 250 ppm\/°C (typ.)\u003c\/li\u003e\n\u003cli\u003eFrequency drift: \u0026lt;2 %, 100 Hz \u0026lt; f \u0026lt; 3700 Hz\u003c\/li\u003e\n\u003cli\u003ePhase jitter (rms): 0.2° (50 Hz to 400 Hz), 0.5° (400 Hz to 3.7 kHz)\u003c\/li\u003e\n\u003cli\u003eFrequency display: 4-digit, 1 Hz resolution and accuracy\u003c\/li\u003e\n\u003cli\u003eFrequency control 10-turn pot with 3 ranges:  4 Hz to 40 Hz, 40 Hz to 400 Hz, 400 Hz to 3.7 kHz\u003c\/li\u003e\n\u003cli\u003eSingle and dual beam experiments\u003c\/li\u003e\n\u003cli\u003eSum \u0026amp; difference reference outputs\u003c\/li\u003e\n\u003cli\u003eBolt clamp or rod mounting\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003ePlease see Datasheet for complete details and specifications.\u003c\/p\u003e","brand":"Stanford Research","offers":[{"title":"Default Title","offer_id":52537729778007,"sku":"SRSSR540","price":1.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0955\/9389\/0135\/files\/SRSSR540.jpg?v=1768380568","url":"https:\/\/www.tsdwelltest.com\/products\/stanford-research-sr540","provider":"TSD Welltest Solution","version":"1.0","type":"link"}