| L1CAL & CAL-TRK LATENCY | |||||
| updated | Oct 26, 04 | ||||
| Step | delta-t (clk) | delta-t (ns) | cumul-t (ns) | Notes | |
| Bunch Crossing | 0.0 | 0.0 | |||
| Transmit to ADF | |||||
| BC to ADF | 650.0 | 650.0 | measured - scope | ||
| sub-total | 650.0 | 650.0 | |||
| ADF | CLK units (ns) | 16.5 | Calvet Mail - 25-Jun-02 | ||
| Signal synchronization | 91.0 | 741.0 | |||
| ADC value valid | 10.0 | 165.0 | 906.0 | ||
| ADC pins sensed | 0.5 | 8.3 | 914.3 | ||
| Digital input decimated | 5.0 | 82.5 | 996.8 | ||
| Peak at convolver output | 26.0 | 429.0 | 1425.8 | ||
| Peak detect & dec. done | 9.0 | 148.5 | 1574.3 | ||
| Et LUT done | 1.0 | 16.5 | 1590.8 | ||
| Serial stream selected | 1.0 | 16.5 | 1607.3 | ||
| Delay adjustment | 0.0 | 0.0 | 1607.3 | ||
| Parity calc / 8-10 bit select | 1.0 | 16.5 | 1623.8 | ||
| FPGA out valid - ser clk | 0.5 | 8.3 | 1632.0 | ||
| LSB of chan at TAB | 3.0 | 49.5 | 1681.5 | ||
| MSB of chan at TAB | 7.0 | 115.5 | 1797.0 | ||
| sub-total | 1147.0 | 1797.0 | |||
| TAB | CLK units (ns) | 11.0 | |||
| SW Chip Input | need to check code | ||||
| Resynch inputs | 12.0 | 132.0 | 1929.0 | ||
| Parity,etc. | 2.0 | 22.0 | 1951.0 | ||
| Data to/from neighbors | 1.0 | 11.0 | 1962.0 | ||
| Test/Data mux | 2.0 | 22.0 | 1984.0 | ||
| Measurement | made 07/10/04 | ||||
| Algo In to SLDB In | 450.0 | 2434.0 | |||
| SLDB | |||||
| transmitter in to out | 90.0 | 2524.0 | K.Johns - 26-Aug-02 | ||
| sub-total | 727.0 | 2524.0 | |||
| CAL-TRK | K. Johns 01-Aug-02 | ||||
| Deserialize | 40.0 | 2564.0 | TDR - meas w/o 250 ns cable | ||
| 8b - 10b decode | 50.0 | 2614.0 | |||
| DAV to FF MT | 40.0 | 2654.0 | |||
| FF MT to start processing | 19.0 | 2673.0 | |||
| Start proc to FB data | 56.0 | 2729.0 | |||
| FB data to avail (+MTC05) | 396.0 | 3125.0 | MTC05 tri logic - 132 ns | ||
| Data avail to data ready | 38.0 | 3163.0 | |||
| extra | 90.0 | 3253.0 | assumes no MTM for Cal-Trk | ||
| sub-total | 729.0 | 3253.0 | |||
| TOTAL | 3253.0 | ||||
| TFW decision due (Run 2a) | 3300.0 | ||||
| Difference | -47.0 | ||||
| TFW decision due (Run 2b) | 4092.0 | ||||
| Difference | -839.0 |