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

	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