Agilent 8648C signal generator upgraded to 4 GHz 1E6 1EA (0280)
serial 0280
Frequency 100 kHz to 4000 MHz
Resolution 1 Hz ( 10 Hz on display )
Amplitude -137 dBm to +20 dBm in steps of 0.1 dB
Modulation AM, FM, PM, Pulse  external AC,DC, 400 Hz, 1 kHz
50 Watt reverse power protection
GPIB interface
Has option : 1E6 Pulse modulation, 1EA High power output
LCD display
Output amplitude above 3.4 GHz can be adjusted by the calibration program