The ADF7012 is a low power ASK/FSK/GFSK UHF transmitter designed for use in Short Range Devices (SRD's). The output power, output channels, deviation frequency and modulation type are programmable by using four 32-bit registers. The fractional-N and VCO with external inductor enable the user to select any frequency in the 50MHz to 1GHz band. The fast lock times of the fractional-N PLL make the ADF7012 suitable in fast frequency hopping systems. The fine frequency deviations available and PLL phase noise performance facilitates narrowband operation.