Manufacturer's Description:
Carrier Frequency: 4000Hz., fixed Interference Frequency: 4001-4150 Hz Difference Frequency: 1-150 Hz., adjustable Output Voltage: 0-16 volts (through 500 ohms) Waveform: Symmetric biphasic square Pulse Width: 125 Microseconds for each phase. Four Frequency Shift: Continuous, 1/1 abrupt, 8/8 abrupt, 10/10 ramped