Comparison of Multiparameter Systems
 |  |  |  | |
| MPA-3 | MPA4 | MPA4T | MCA4A-MPA | |
| PC Bus | PCI | USB 2.0 | USB 2.0 | USB 3.0 |
| input channels | 2, 4 | 4, 8 | 4, 8 | 2, 4 |
| dependent groups | yes | yes | yes | no |
| RTC resolution | 100 ns | 6.4 ns | 6.4 ns | 8 ns |
| RTC reset input | yes | yes | yes | yes |
| external RTC clock | yes | no | no | yes |
| max. rate / channel | 350 kHz | 350 kHz | 350 kHz | 1 MHz |
| ADCs required | yes | yes | yes | no |
| SVA mode | yes | yes | yes | yes |
| TDCs possible | yes | yes | yes | no |
| ADC Gating | yes | yes | yes | yes |
| MCS mode | no | no | yes | yes |
| MCS channels | - | - | 5(6) | 2 |
| MCS resolution | - | - | 100 psec | 1 ch 30 ns / 2 ch 50 ns |
| max MCS rate | - | - | ~10 MHz cont. / 10 GHz burst | 400 MHz |
| combined MCS and PHA | - | - | yes | no |
| tag bits via ADC ports | yes | yes | yes | no |
| extra tag bits | - | - | 16 | 8 |
| tag bit time resolution | - | - | 6.4 ns | 2.5 μsec |
| Digital I/O ports | 8 | 8 | 8 | 8 |
| GO-line | yes | yes | yes | yes |
| Aux inputs | 2 | 2 | 2 | - |
| Reject input | 1 | 1 | 1 | 1 per ADC (=Gate) |
| Scaler option | 12 (ISA card MS-12) | 8 Scalers | 8 Scalers | 8 Scalers |