Frequency range 80Khz-520Mhz with calibrated output levels from -127 DBm to +13dBm. Resolution 10Hz. It can be frequency, phase or amplitude modulated from external or internal modulation sources. RF output resolution is 0.1dB, reverse power protection of up to 50W is possible without damage to the instrument. This instrument is microprocessor controlled and very easy to use, a must for any serious repair or development lab.