An open source synchronizer for the velocimetry of fluids using a Raspberry Pi microcontroller.
- Output Channels: 8
- Input Channels: 1
- I/O Channel Voltage: 5V @ 50 ohm
- Output Current: 50 mA into 50 ohm, 5 mA into 1k ohm
- Output Voltage: 2.5 V into 50 ohm, 5 V into high impedance
- Clock Dividers: 1, 2, 5, 25, 250
- Communications: USB 2.0 OTG (On-The-Go)
- Oscillator: 12 MHz, 30 ppm crystal oscillator
- PLL Frequency: 250 MHz (4 ns resolution)
- PLL Jitter: typically < 0.1 ns
- Internal Sync Clocks: 3
- Repetition Rate: 0.06 Hz to 1.9 MHz (0.0004 Hz to 7 kHz with max clock divider)
- Pulse Control Modes: freerun, external trigger (rising edge)
- Ext. Trigger Min Pulse Width: 8 ns * clock divider
- Trigger Signal Delay: 20 ns * clock divider
- I/O Resolution: 4 ns * clock divider (e.g., 4 ns, 8 ns, 20 ns, 100 ns, 1 us resolutions)
- Pulse Width: 20 ns to 15 s (5 us to 4,000 s with max clock divider)
- Max Pulse Sequence Length: 16 instruction pairs
- Max Pulse Sequence Repetition: 500,000 iterations
- Single-Channel Jitter: typically < 0.1 ns
- Inter-Channel Jitter: typically < 0.3 ns
- Rise/Fall Time: typically < 4 ns