2277/EXP | 2277/EXP2 | |
Number of Inputs | 4 or 8 depending on the mode each with 64 leading edges recorded. In mode 2, 4 inputs with 64 leading and trailing edges recorded. | 2 with 128 leading and trailing edge capacity (128 pulses, measuring both leading and trailing edge). |
Inputs | 110 ohm, differential ECL levels; 34-pin header. | 2 front panel Lemo connectors, 50 ohm for fast NIM signals, ORed with 2 front panel 2-pin headers for differential ECL, 100 ohm; 2 NIM (50 ohm Lemo) to differential ECL converters are provided for convenient operation with the 2277, |
3377, 1876 or 1877 TDCs. | ||
Outputs | Differential ECL, designed to match the 2277, 3377, 1876 or 1877. | Same as the 2277/EXP. |
Mode Select | Jumper across the 17th pair of the input connector selects mode 1 (8 input). Without the jumper, the unit is in mode 2 (4 inputs). | N/A |
Double Pulse Resolution | 5 nsec | 2 nsec |
Propagation Delay | 8 nsec | 4 nsec |
Channel-to-Channel Variation | Less than 2 nsec | Less than 1 nsec |
CAMAC | CAMAC is used as a power source only. | CAMAC is used as a power source only. |
Power | 1.7 A at -6 V | 2.4 A at -6 V, 0.1 A at +6 V |