Revision B 120 Series Maternal/Fetal Monitor 4-19
2015590-001
Theory of Operation: Main Motherboard
Table 4-9. Remote Mark Jack—PH2
Pin Number Description
Inner Conductor Remote Mark Input Line
Outer Ring Remote Mark Ground
Table 4-10. Fetal Acoustic Stimulator (FAST) Jack—PH3
Pin Number Description
Inner Conductor FAST Mark Input Line
Outer Ring Mark Ground
Table 4-11. FECG/MECG Jack—PH1
Pin Number Description
Tip Conductor 1 FECG 80 dB Output Line
Center Conductor 2 MECG 60 dB Output Line
Outer Ring Ground
Table 4-12. Legplate Connector—J1
Pin Number Description
1LA
2 ECG Common (RL and RA)
3 ECG Common