2 Theory of Operation Integrated Monitor Theory of Operation
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ECG-Out Marker-In The ECG Out/Marker In interface receives the ECG waveform
directly from the ECG/Resp Arrhythmia ST-Segment
physiological algorithm via an RS-422 serial interface and
converts the digital ECG signal to an analog ECG signal. In
addition, the ECG Out controller receives from a connected
device the marker information and forwards this data to the
ECG/Resp Arrhythmia ST-Segment physiological algorithm.
The converted analog signal is used to synchronize a connected
device to the patient’s ECG
RS-422 The serial link RS-422 interface communicates the ECG signal
to the ECG Output/Marker In of the IntelliVue Patient
Monitoring System display unit. The interface is a serial,
differential, full-duplex link. The interface is ESD protected.
PS/2 The PS/2 interface supports the serial protocol of standard PS/2
devices (mouse). The PS/2 serial protocol is interpreted by the
HIF Control interface.
Functional Block Description
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