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DC1705C features the LTC6946, an ultralow noise and spurious integer-N frequency synthesizer with integrated VCO. The VCO uses no external components and is internally calibrated without external system support.
There are four options of the DC1705C, one for each version of the LTC6946. Table 1 in the Demo Manual summarizes the available DC1705C options.
Each DC1705C provides 50Ω SMA connectors for the reference frequency input, fREF (REF+ IN), the reference output buffer (REF OUT), and the differential RF output (RF+ and RF–). A DC590 USB serial controller board is used for SPI communication with the LTC6946, controlled by the supplied PLLWizard™ software.