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The SBL-1-1 from Mini Circuits is a RF Mixer with RF Frequency 0 to 400 MHz, IF Frequency 0 to 400 MHz, LO Frequency 0 to 0.1 MHz, Conversion Loss 4.84 to 8 dB, LO/RF Isolation 45 dB. More details for SBL-1-1 can be seen below.
Triple Balanced Surface Mount Mixer from 1 to 3500 MHz
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