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APPENDIX A. SPECIFICATIONS
A.1. Performance
Maximum Counting Rate 150 MHz at the IN connector; 1 MHz at the SCA IN connector.
Discriminator Thresholds (IN and CHN ADV IN) Software controlled and variable from
!
1.6 V to +3 V in 1.5 mV steps (minimum pulse amplitude 30 mV). Triggering selectable for
either positive or negative slopes on the fast analog signal IN connector. The external channel
advance input triggers only on a positive slope.
SCA IN Thresholds Upper and lower thresholds independently selectable via the computer
from 0 V to +10 V with 12-bit resolution.
Dwell Time
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Internal Clock Dwell time per channel is computer selectable from the following
ranges, with accuracy within ±100 ppm over the operating temperature range:
100 ns to 1.3 ms in 20 ns steps
1.3 ms to 1.3 s in 20
μ
s steps
1.3 s to 1300 s in 20 ms steps
!
External Clock Input The external channel advance input (CHN ADV IN) determines
the dwell time. The minimum external dwell time is 100 ns per channel.
Channel-Width Uniformity Systematic dwell-time variations over the entire pass length are
<0.1% for the worst case of 100 ns dwell time.
Pass Length The number of time bins (channels) in a single pass is computer selectable from
4 to 65,536.
Pass Preset The instrument can be programmed to stop data acquisition after a preset number
of scans. The Pass Preset can be selected from 1 to 4,294,967,295, or turned OFF.
Memory Capacity 1,073,741,823 counts/channel (30 bits).
Acquisition Modes
!
Sum The data set from each pass is added to the sum of the data sets from the previous
passes.
!
Replace The data set from the current pass replaces the data set from the previous pass.
Содержание Easy-MCS
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