C3866

Specifications

Parameter		C3866	C6465
Input Impedance		50	50
Discrimination Level (Converted Into Input)		-0.5 mV to -16 mV	-2.2 mV to -31 mV
Gain Requierd in PMT (Recommendation)		3 * 106	5 * 106
Prescaler		÷1, ÷10	-
Maximum Count Rate (Random Pulse: -10 % deviation)	÷1	4 * 106 s-1 (Typ.)	1 * 106 s-1 (Typ.)
	÷10	1 * 107 s-1 (Typ.)
Pulse Pair Resolution	÷1	25 ns	60 ns
	÷10	10 ns
Output Pulse		TTL Compatible positive logic (C-MOS 5 V)	TTL Positive logic
Output Pulse Width	÷1	10 ns	30 ns
	÷10	Depending on count rate
Supply Voltage		+5.2 V ± 0.2 V, 150 mA -5.2 V ± 0.2 V, 300 mA	+5 V ±0.2 V, 60 mA -5 V ±0.2 V, 120 mA
Connectors	Input	BNC	BNC
	Output	BNC	BNC
	Remote	BNC	-
	Power Supply	HIROSE SR30-10R-4S	DIN (6 PIN)
Operating Temperature		0 °C to +40 °C	0 °C to +40 °C
Storage Temperature		-15 °C to +60 °C	-15 °C to +60 °C
Size (W * H * D)		88 mm * 32 mm * 170 mm	60 mm * 43.2 mm * 105 mm
Weight		Approx. 320 g	Approx. 250 g

NOTE:
  : Selectable by the switch or remote control.
  : C6465 does not have a prescaler.
  : Output stage C3866: ADVANCED C-MOS (National Semiconductor 74AC153), C6465: ADVANCED C-MOS (TOSHIBA TC74ACT04)
  : Fitting plug (HIROSE SR30-10PQ-4P) with cable is supplied with C3866 (1 m)
  : Fitting plug with cable is supplied with C6465 (1.5 m)


Description

Photon counting units C3866 are designed to convert single photoelectron pulses from a photomultiplier tube into 5 V digital signals by use of the built-in amplifier and discriminator circuits. Photon counting with a high S/N ratio can be performed by simply connecting a counter to the output of the photon counting unit.

The C3866 uses a high-speed electronic circuit that allows measurement with an excellent output linearity up to 10⁷ s^-1. The C3866 also has a prescaler (division by 10) eliminating the need for a high-speed counter.

The C6465 provides an output linearity up to 10⁶ s^-1 and an output pulse width of 30 ns, making it suitable for use with a generalpurpose counter.