The model 2230 A is a Programmable Frequency and Level Generator which covers the 50 Hz to 1 MHz range with 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, analogical setting by two verniers with graduated scale, frequency sweep by external signal. Option 020 = The frequency and level remote programming is achieved through the IEEE bus.
