Geophone Output

Pin Signal
A      North-South (-)
B     North-South (+)
C     Vertical (-)
D     Vertical (+)
E     East-West (-)
F     East-West (+)
H     Calibration Input N-S
J     Calibration Input Z
K     Calibration Input E-W
L     Calibration Common
Mating Connector: [MIL-C-10544] U127/U (or Nato-Nr. 5935-577-0304)