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凭借其采集速率达100平均谱图/秒的能力,FASTFLIGHT-2成为LC/TOF-MS/和GC/TOF-MS应用中优异的数据采集解决方案。色谱技术正在向更短的保留时间发展,使得飞行时间质谱(TOF-MS)获取平均谱图的速度越来越快。对比代的数字信号平均器,FASTFLIGHT-2 将TOF谱图处理速度提高了10倍,因而有能力适应更快的色谱仪。
由于使用了采样ADC以及硬件数字信号平均器,FASTFLIGHT-2能处理LC/TOF-MS, GC/TOF-MS, Ion-Trap/TOF-MS 和 MALDI I TOF-MS中碰到的高速离子而不用像在时间数字转换器(TDC)中遭受死区时间的困扰。对比瞬时数字转换器以及数字采样示波器,他们都面临缓慢的软件平均速度,FASTFLIGHT-2传递平均谱图的速度比它们快了好多个数量级。
其创新的,自动关联噪声消减特性意味着FASTFLIGHT-2在QqTOF-MS低速离子应用中也是有效的解决方案,这一领域以前一直被认为都是TDC和时间转换器所。
Hardware | - |
PERFORMANCE | - |
Amplitude Digitizing Resolution | 8 bit- ADC nominally spans 500 mV at the Analog Input. |
Precision Enhancer | Extends the limiting ADC resolution to 12 bits (for input noise <2 mV) when circa 256 or more records are averaged3. Optionally, on or off. |
Differential and Integral Non-Linearity (DNL and INL) | Measured from 5% to 95% of full scale using a 500 mV, 70 µs ramp, with Precision Enhancer on. DNL within ±0.1 LDB referred to the 8-bit ADC. INL within ±0.4% of full scale. |
Analog input Bandwidth | DC to 500 MHz; rise adn fall times <1 ns. |
Equivalent input Noise | (Measured with 500 ps sampling and 50 µs record lenght.) Uncorrelated with the Trigger <2 mV rms. Correlated with the Trigger <0.02 mV (typically 0.01 mV rms) with Automatic Correlated Noise Substruction. |
Automatic Correlated Noise Substruction | Automatically assesses the correlated noise in each spectrum and substracts it without compromising data throughout rates. Optionally, on or off. |
Analog DC Offset (Vertical Offset) | Zero offset of the ADC is computer adjustable from -250 mV to +250 mv with 0.03 mV resolution, referred to the Analog input. |
Sampling intervals | Hardware 500 ps, 1 ns or 2 ns real-time sampling with one scan per pound; 250 ps interleaved sampling with two scans per second4. Software can display 250 ps interpolated sampling from a spectrum sampled at 500 ps. |
Record Size (Hardware) | 8 bits per sampled point and up to 1.5 M points per record (at 250, 500, 1000 ir 2000 ps/point. Record length selectabel from a minumum of 10 µs to a maximum of 1.5 M points in steps of 512 points. |
Spectrum Size (Hardware) | Identical to Record Size, except 24 bits per sampled point, providing rapid hardware summing of up to 65,535 records ub a spectrum. |
ADC Sampling Interval (ps) | Min. Spectrum Length (µs) | Max. Spectrum Lenght (µs) |
250 | 10 | 375 |
500 | 10 | 750 |
1000 | 10 | 1500 |
2000 | 10 | 3000 |