MCA8000 Description (January 2005)

  • 8.12µs successive approximation ADC (14-bit resolution)
  • Discriminators (computer-controlled in 0.3% increments):
    • Upper Level 0% to 105% of full scale
    • Lower Level <1% to 105% of full scale
  • Zero adjustment ± or full range in increments of 0.0005% (computer controlled)
  • Maximum throughput: 70,000 cps

ADC Non-linearity

  • Differential non-linearity: <±1% over top 99% of range
  • Integral non-linearity: <±0.05% over top 99% of range

Spectrum memory

  • MCA 8001: 250, 500, 1000 channels
  • MCA 8002: 250, 500, 1000, 2000 channels
  • MCA 8004: 250, 500, 1000, 2000, 4000 channels
  • MCA 8008: 250, 500, 1000, 2000, 4000, 8000 channels
  • MCA 8016: 250, 1000, 2000, 4000, 8000, 16000 channels
  • Maximum counts per channel: 231 - 1 (i.e., 2.1E9)

Digital Stabilizer

  • Internal ADC zero and gain stabilization
  • PC-controlled time constants
  • Balanced channel and ROI centroid modes
  • Gain: ±3% range

Multichannel Scaling

  • Input Rate: 5 MHz
  • Dwell Time: 10 ms to 2.1E7 seconds
  • Dead-time: 3µs between passes and 3µs between channels
  • Signal sources: internal SCA, any ROI, external input

Counting presets

  • Real time
  • Live time
  • Integral of all ROIs
  • Integral of selected ROIs
  • Gross ROI statistics
  • Net ROI statistics
  • Total system counts
  • Total SCA counts

Battery backup for

  • Spectrum
  • Setup parameters
  • Clock memory

Computer control

  • Ethernet 10/100 base T
  • RS-232 baud rates:
    • 2400, 9600, 19200, 38400, 57600, 115200
  • Maximum number of units connected to PC: 8

Front panel indicators

  • LEDs for Acquire, Event, Serial Com, AUX I/O in-use, Power, Ethernet Connection, 100Mbps, Collision
  • Dead-time meter: 3-color LED array

Rear panel controls and connectors

  • Power switch
  • 2.5 mm power jack
  • Fuse housing
  • 9-pin D male RS-232 connector
  • 25-pin D female connector for ROI output
  • 15-pin female high-density D-sub auxiliary I/O connector
  • Ethernet interface connector (RJ-45)
  • ADC input (BNC) 0-10V unipolar or bipolar pulse
  • ADC gate input (BNC) (coin. / anti-coin. / off) CMOS/TTL
  • Pile-up reject input (BNC) CMOS/TTL
  • Amp busy input for ext. amp. live-time corr. (BNC) CMOS/TTL
  • SCA ouput CMOS/TTL
  • Peak detect output (BNC) CMOS/TTL
  • ADC busy out (BNC) CMOS/TTL

Weight

  • 4.06 lb (1.85 kg)

Dimensions

  • 0.4 in. (26.4 cm) wide
  • 12.3 in. (31.1 cm) deep
  • 2.75 in. (7.0 cm) high

Power requirements

  • 10-18 V DC, 9.6 watts, external
  • 12 V universal AC converter provided

Software

  • 32-bit QuantumMCA compatible with Windows® 95/98/NT

Accessories

  • QuantumGold™ software for quantitative analysis
  • High-purity germanium detectors
  • Selection of signal, interface, and detector bias cables

The System 8000 is covered by a one year return-to-factory limited warranty.