The 86635A ØM/FM RF Signal Generator Plug-in is a high-performance RF signal generator providing both phase and frequency modulation. FM Functions: Int. and Ext., FM CF CAL FM Center Frequency Long-Term Stability: Typically <1kHz/hr FM Indicated Accuracy (up to 20kHz rates): ±5% of full scale ØM Functions: Int. and Ext. ØM Indicated Accuracy (15° to 35° C): ±5% of full scale up to 100kHz rates; ±8% of full scale up to 2MHz rates; ±15% of full scale up to 10MHz rates Input Impedance: 600 ohms