928 EASY-NIM multi-function MCA/counter/timer/count rate meter

All in one

independent

928

MCB/Four-way counter/
Combination of dual timer modules

928-MCB

onlyMCB

928-COUNT2

only2counters/1timers

928-COUNT4

only4counters/2timers

ADC

Successive approximation type with sliding scale linearization

resolution

16,384channels, software selectable16,384、8,192、4,096、2048、1024and512。

Dead time for each event

2 μsIncludes memory transfer.

integral nonlinearity

before the dynamic range99％，<+0.025％。

differential nonlinearity

before the dynamic range99％，<±1%。

gain instability

<+50 ppm/°C。

Dead time correction

The software can be based onGedcke-Halemethod orZDTLive time correction for extended live time
Interval correction, which monitors the count rate and adjusts for dead time during count rate fluctuations.

data memory

512 kb。

ADCinput

Accepts positive unipolar, positive gated integrator, or0to+10 VBipolar analog pulses that are predominantly positive within the dynamic range;+12 V；0.25Arrive30 μsThe semi-Gaussian time constant of3Arrive30 μsthe time constant of the gated integrator shape, or the delay line shape, where the width>0.25 μs。Z_in =1kΩ DC coupling. No internal delays,BNCconnector.

ADCdoor

OptionalTTLEnter. The computer can choose conform mode, anti-conform mode, or off. The signal must occur before and exceed the pulse peak0.5-μs；BNCconnector.
Z_in =1kΩ。

OptionalTTLinput

The computer can choose conform mode, anti-conform mode, or off. The signal must occur before and exceed the pulse peak0.5-μs；BNCconnector.Z_in =1kΩ。

PUR

Stack rejection input; acceptTTLSignal; the signal must occur before peak detection.Z_in =1kΩ。BNCconnector.

busy

Busy input used by the live time correction circuit. acceptTTLSignal; the signal must occur before peak detection.Z_in =1kΩ。BNCconnector.

real time/living time

20Multiple of milliseconds.

area of interest

Peak count/Points counting.

Data overflow

When any channel exceeds2³¹-1Data collection will be terminated.

peak uncertainty

Acquisition stops when the statistical or counting uncertainty of the user-selected net peak reaches a specified value.

nuclideMDA

When the user specifiesMDAThe minimum detectable activity (MDA) value reaches the specified value, data collection will stop.

Count rate

200 MHz。

Number of counters

4(2one in928-COUNT2middle).

Number of timers

2(1one in928-COUNT2middle).

Counting capacity

32Bit.

Pulse pair resolution

7 ns。

Counter input1、2、3、4

Fast analog signal inputs are available on the front panelBNCThe connector accepts amplitudes up to ±5 Vof analog or digital pulses. Pulses are counted when they exceed the discriminator threshold. The computer selects to trigger on positive or negative slope. The threshold can be determined by computer at-1.6 Vto+3 VAdjust within the range, the step size is1.5 mV(minimum pulse30 mV). Computer optional50Ω or1000Ω input impedance, DC coupled. At the discriminator threshold, the minimum input pulse width is3.5 ns. The count rate is200 MHz。

Input1、2、3、4、5、6

front panelBNCInput acceptsTTLinput signal. Each input is<0.8 Vis considered low when the>2 Vis considered high level. The input impedance is1000Ω is grounded. Each input can be configured as described previously for counter and timer settings.

Output1、2

rear panelBNCoutput, used as a generalTTLoutput terminal.<0.4 Vis low level.>+2.4 Vis high level. The output can be driven50 Ω. As mentioned before, the outputs can be configured via software.

Reading control

Real-time values of timers and counters can be read from the computer at any time. Additionally, each counter or timer has a128LiteralFifo(First-out) buffer used to hold the previous final counter result when a counter or timer is reset. UseFifo, the counter can be configured to reset after the timer reaches a preset value. The current counter value is stored in itsFifo, so the computer can read consecutive values without worrying about losing results because the computer is slow.

USB-2.0

StandardUSBConnection is via the included10ft. of cable implemented.

indicator

ADCinstructionsADC-1activity.
Counter: Will light up if any of the four counters are counting.

MCBSoftware control

(Use the includedMAESTROperform operations - See datasheet for details. )
ADC LLD： The computer can be accessed from0Arrive100% of full scale for control.
ADC ULD： The computer can be accessed from0Arrive100% of full scale for control.
Live Time: Correction Gedcke-Hale，ZDT。
Door:Conform, anti-conform, close.

Required power supply

+6 V, 350 mA; -6 V, 225 mA; +12 V, 100 mA; –12 V, 100 mA。

weight

Net weight 0.9Kilogram (2pounds).Shipping weight 2.25Kilogram (5pounds).

Size

NIMStandard, single width,3.43 x 22.13cm (1.35 x 8.714inches) front panel, conforming toDOE/ER0457Trequirements.

Model

Description

928

MCB/Four-way counter/Combination of dual timer modules. includeMAESTRO MCASimulation software, front panel software andUSBcable.

928-MCB

Instrumental onlyMCBsection (no counter/timer function). includeMAESTRO MCAsimulation software andUSBcable.

928-COUNT2

module only2counters/1timer section (noneMCBfunction). Includes front panel software andUSBcable.

928-COUNT4

module only4counters/2timer section (noneMCBfunction). Includes front panel software andUSBcable.