Timebase & Acquisition
AssemblyThe timing engine: an FPGA triggers laser pulses against a precision oscillator, bins ADC samples by round-trip time, and averages thousands of traces in dedicated memory to pull backscatter out of noise. A full specification article for this item is being written. Meanwhile its bill of materials and connections are below.
Bill of materials for Timebase & Acquisition
5 top-level lines as of r118251| # | Item / sub-assembly | Part no. | Qty/assy | Ext. qty | Parts | Type |
|---|---|---|---|---|---|---|
| 1 | Acquisition FPGA | otdr-tester-fpga | 1× | 1 | · | part |
| 2 | Reference Oscillator | otdr-tester-ocxo | 1× | 1 | · | part |
| 3 | Trace Memory | otdr-tester-trace-ram | 1× | 1 | · | part |
| 4 | Bare PCB | pcb-bare | 1× | 1 | · | part |
| 5 | SMD Passive (R/C/L) | smd-passives | 80× | 80 | · | part |