Adret 2230A Frequency Synthesizer

The model 2230 A is a Programmable Frequency and Level Generator.

• Frequency range: 50 Hz to 1 MHz
• Resolution: 1 Hz resolution

The output frequency can be controlled according to four operating modes: digital setting by six lever / indicator switches, remote programming in parallel BCD code or through the IEEE bus, analog setting by two verniers with graduated scale, frequency sweep by external signal. 

Four output signals are simultaneously available:

• Main output with pushbutton selectable impedance: 75 ohms coaxial, 150 ohms balanced, 600 ohms balanced or low-impedance balanced (key 0 ohm)
• Auxiliary output with Z < 1 ohms impedance
• Square-wave output with 5 V or 10 V amplitude
• Tracking output delivering a signal with 4 MHz offset with respect to the dialled or programmed frequency