... , cement&engineering test. DB Acoustic AnalyzerDB series (DB4, DB8, DB16) type multi-function acoustic meter is designed in line with the three ... flex emissivesource etc. The main technical requirements: 1. Trigger: trigger type: CH1, CH2, CH3, CH4, priority trigger, external trigger, computer trigger ... .5, 1, 2, 4 Ms;10. Negative latency points (for multi-channel): 2, 4, 8, 16, 32, 64, 128 byte (DB4 ...