The APL1983 from ASB Inc. is a Frequency Synthesizer with Frequency 1.947 to 2.019 GHz, Step Size 25 KHz, Reference Frequency 10 MHz, Output Power 0 to 4 dBm, Harmonics -25 to -20 dBc. Tags: Surface Mount, PLL Frequency Synthesizer. More details for APL1983 can be seen below.