| 10 MHz reference oscillator | Improves stability and accuracy |
| Pulse Modulator | Fast rise time and repetition rate |
| AF synthesizer* | Sine-wave, triangular, square and saw tooth waveforms 0.01 Hz to 400 kHz, 0.01 Hz resolution |
| FSK Encoder* | 2 or 4 level FSK |
| Pattern Generator* | Create digital patterns to modulate |
*Only two of the starred three may be installed simultaneously.