GE Ultrasonic USM Go - Page 174

Appendix C. EN 12668 Specifications
156 USM Go Operator’s Manual
Paragraph Parameter LSL Typ. USL Units Test Conditions
9.5.3 Equivalent Input Noise - 50 80 nV/
sqrt Hz
Low Pass Selected
-3780nV/
sqrt Hz
4 to 5 MHz Selected
-3380nV/
sqrt Hz
10 MHz Selected
-4080nV/
sqrt Hz
13 MHz Selected
-4580nV/
sqrt Hz
BroadBand Selected
9.5.4 Accuracy of Calibrated Attenuator -1 0.7 1 dB Cumulative Error over 20dB Range
-2 0.7 2 dB Cumulative Error over 60dB Range
Table 2: EN 12668-1:2000 Specifications (cont.)