| Connector / Led | Style | Level | Description |
|---|---|---|---|
| USB | Micro-USB | MMC diagnostics serial port / JTAG interface | |
| Link TX (SFP) | LC | Optical 850 nm | Event link Transmit |
| Green: TX enable | |||
| Red: Fract.syn. not locked | |||
| Blue: Event out | |||
| Link RX (SFP) | LC | Optical 850 nm | Event link Receiver |
| Green: link up | |||
| Red: link violation detected | |||
| Blue: event led | |||
| IFB | VHDCI | LVDS | IFB-300 Interface Box connection |
| IN0 | LEMO | TTL | FPTTL0 Trigger input |
| IN1 | LEMO | TTL (3.3V / 5V) | FPTTL1 Trigger input |
| OUT0 | LEMO | 3.3V LVTTL | TTL Front panel output 0 |
| OUT1 | LEMO | 3.3V LVTTL | TTL Front panel output 1 |
| OUT2 | LEMO | 3.3V LVTTL | TTL Front panel output 2 |
| OUT3 | LEMO | 3.3V LVTTL | TTL Front panel output 3 |
| TCLKA | mTCA.4 | LVDS | TCLKA clock on backplane |
| This signal is driven by CML/GTX logic block 0 | |||
| Mapped as Universal Output 16 | |||
| TCLKB | mTCA.4 | LVDS | TCLKB clock on backplane |
| This signal is driven by CML/GTX logic block 1 | |||
| Mapped as Universal Output 17 | |||
| RX17 | mTCA.4 | MLVDS | Backplane output 0 |
| TX17 | mTCA.4 | MLVDS | Backplane output 1 |
| RX18 | mTCA.4 | MLVDS | Backplane output 2 |
| TX18 | mTCA.4 | MLVDS | Backplane output 3 |
| RX19 | mTCA.4 | MLVDS | Backplane output 4 |
| TX19 | mTCA.4 | MLVDS | Backplane output 5 |
| RX20 | mTCA.4 | MLVDS | Backplane output 6 |
| TX20 | mTCA.4 | MLVDS | Backplane output 7 |