The 5155A UHF Frequency Synthesizer is a UHF frequency synthesizer that operates in the range from 100kHz to 1GHz with a resolution of 0.1Hz. Output level is +3.1 to +13 dBm into 50-ohms. Features very low close-in phase noise. This unit has a TCXO reference oscillator, a GPIB interface and a 1MHz external reference input. Digital readout of frequency and amplitude on front panel.