Geophone Output

Pin Signal
A     Case
B     Vertical (+)
G     Vertical (-)
C     North-South (+)
H     North-South (-)
D     East-West (+)
J     East-West (-)
E     Auto Zero
S     Return
N     Calibration V
P     Calibration W
Q     Calibration U
M     Calibration Common
W     12V DC (+)
X     Ground
Mating Connector: [MIL-C-5015] 24-28P (or CA3106F24-28P)