{"id":740,"date":"2020-12-24T19:12:20","date_gmt":"2020-12-24T19:12:20","guid":{"rendered":"https:\/\/www.trekequipment.com\/?post_type=product&p=740"},"modified":"2021-01-24T23:17:54","modified_gmt":"2021-01-24T23:17:54","slug":"nf-li75a-low-noise-preamplifier","status":"publish","type":"product","link":"https:\/\/www.trekequipment.com\/product\/nf-li75a-low-noise-preamplifier\/","title":{"rendered":"NF LI75A Low Noise Preamplifier"},"content":{"rendered":"

The LI-75A is a preamplifier designed to increase measurement sensitivity when using the NF Look-in Amplifiers.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Sensitivity<\/strong><\/td>\n100nV to 500mV<\/td>\n<\/tr>\n
Frequency range<\/strong><\/td>\n0.5Hz to 200kHz<\/td>\n<\/tr>\n
Input mode<\/strong><\/td>\nGround line may be switch-floated.<\/td>\n<\/tr>\n
Input impedence<\/strong><\/td>\n100M ohm\/\/40pF<\/td>\n<\/tr>\n
Input referred noise<\/strong><\/td>\nLess than 5nV\/\u221aHz (at 1kHz)<\/td>\n<\/tr>\n
Reference mode<\/strong><\/td>\nAUTO, INT, EXT, EXT2F<\/td>\n<\/tr>\n
Phase adjustment<\/strong><\/td>\nNot required<\/td>\n<\/tr>\n
Time constant<\/strong><\/td>\n1.25ms to 125s, 6dB\/oct or 12dB\/oct<\/td>\n<\/tr>\n
Dynamic reserve<\/strong><\/td>\nMaximum 60dB<\/td>\n<\/tr>\n
DC output<\/strong><\/td>\nAcos\u03c6, Asin\u03c6, A, \u03c6, NOISE<\/td>\n<\/tr>\n
Power requirements<\/strong><\/td>\nAC100V, 120V, 220V or 240V switchable<\/td>\n<\/tr>\n
Dimensions(mm)<\/strong><\/td>\n480(W) X 149(H) X 500(D)<\/td>\n<\/tr>\n
Weight<\/strong><\/td>\napprox.20kg<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"excerpt":{"rendered":"
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