La description

Key Facts This option improves the phase noise performance from typically ?135 dBc (1 Hz) down to -139 dBc (1 Hz) at 1 GHz carrier frequency, 20 kHz offset. Furthermore the nonharmonics are lower with this option (10 kHz carrier offset, 200 MHz < f ? 1500 MHz). The option provides additionally the analog modulation types FM / ?M.
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