Model	2249A	2249SG	2249W	2259B	4300B*
No. of Channels	12	12	12	12	16
No. of Bits	10	10	11	11	11
CAMAC Size	#1	#2	#1	#1	#1
Charge (Q) or Voltage (V)	Q	Q	Q	V	Q
Analog Inputs	DC-coupled, 50 ohm, Linear range -2 mV to -1 V. Note 1	DC-coupled, 50 ohm, Linear range -2 mV to -1 V. Note 1	AC-coupled, (2 msec Tc) 50 ohm, Linear range 0 to -2 V. Note 1	DC-coupled, 50 ohm, Negative going pulse � 50 nsec rise time or bipolar pulses with negative lobe first. Note 1	DC-coupled 50 ohm
Full Scale	-256 pC �5%	-256 pC �5%	-512 pC �5%	-2 V �5%	-480 pC �5%
Maximum Resolution	-0.25 pC	-0.25 pC	-0.25 pC	-1 mV	-0.25 pC
Gate Input	Common gate, 50 ohm, -600 mV or greater to enable. Width 10 to 200 nsec. (Actual limit approx. 2 �sec with reduced accuracy.) Notes 2,3	Separate gates, 50 ohm, -600 mV or greater to enable. Width 10 to 200 nsec. (Actual limit approx. 2 �sec with reduced accuracy.) Notes 2,3	Common gate, 50 ohm, -600 mV or greater to enable. Width 30 nsec to 10 �sec. Notes 2,3	Common gate, 50 ohm, -600 mV or greater to enable. Width 100 nsec to 5 �sec. Notes 3,5	Common gate, differential GOR levels. Width 50 to 500 nsec. Note 6
Conversion Time	60 �sec	60 �sec	106 �sec	106 �sec	8.5 �sec (11 Bits)
Special Features	n/a	Separate gates input	Wide range of gate widths	n/a	Includes high speed data output bus

Model	2249A	2249SG	2249W	2259B	4300B*
No. of Channels	12	12	12	12	16
No. of Bits	10	10	11	11	11
CAMAC Size	#1	#2	#1	#1	#1
Charge (Q) or Voltage (V)	Q	Q	Q	V	Q
Analog Inputs	DC-coupled, 50 ohm, Linear range -2 mV to -1 V. Note 1	DC-coupled, 50 ohm, Linear range -2 mV to -1 V. Note 1	AC-coupled, (2 msec Tc) 50 ohm, Linear range 0 to -2 V. Note 1	DC-coupled, 50 ohm, Negative going pulse � 50 nsec rise time or bipolar pulses with negative lobe first. Note 1	DC-coupled 50 ohm
Full Scale	-256 pC �5%	-256 pC �5%	-512 pC �5%	-2 V �5%	-480 pC �5%
Maximum Resolution	-0.25 pC	-0.25 pC	-0.25 pC	-1 mV	-0.25 pC
Gate Input	Common gate, 50 ohm, -600 mV or greater to enable. Width 10 to 200 nsec. (Actual limit approx. 2 �sec with reduced accuracy.) Notes 2,3	Separate gates, 50 ohm, -600 mV or greater to enable. Width 10 to 200 nsec. (Actual limit approx. 2 �sec with reduced accuracy.) Notes 2,3	Common gate, 50 ohm, -600 mV or greater to enable. Width 30 nsec to 10 �sec. Notes 2,3	Common gate, 50 ohm, -600 mV or greater to enable. Width 100 nsec to 5 �sec. Notes 3,5	Common gate, differential GOR levels. Width 50 to 500 nsec. Note 6
Conversion Time	60 �sec	60 �sec	106 �sec	106 �sec	8.5 �sec (11 Bits)
Special Features	n/a	Separate gates input	Wide range of gate widths	n/a	Includes high speed data output bus