| LH 23.21 | Audio Frequency Function Generator 1Hz to 100KHz |
| LH 23.22 | Audio Frequency Function Generator 1Hz to 100KHz (Digital) |
| LH 23.23 | Audio Frequency Function Generator 1Hz to 200KHz |
| LH 23.24 | Audio Frequency Function Generator 1Hz to 200KHz (Digital) |
| LH 23.25 | Function Generator 0.1Hz to 1MHz (Analog) |
| LH 23.26 | Function Generator 0.1Hz to 1MHz (Digital) |
| LH 23.27 | Function Generator 0.2Hz to 2MHz (Digital) |
| LH 23.28 | FunctionGenerator 1Hz to 10MHz (Digital) |