1 GSPS internal clock speed (up to 400 MHz analog output) Integrated 1 GSPS, 14-bit DAC 0.23 Hz or better frequency resolution Phase noise ≤ −125 dBc/Hz @ 1 kHz offset (400 MHz carrier) Excellent dynamic performance with >80 dB narrow-band SFDR Serial input/output (I/O) control Automatic linear or a.