ZOLL R Series Monitor Defibrillator Rev J - Manual (Page 155)

R Series Service Manual
9650-0903-01 Rev. J 5-3
Analog System Board
The R Series Analog System Board contains both the isolated Core ECG circuitry and the non-isolated power supplies, power management, and analog
support functions for the R Series defibrillator.
Core ECG circuitry
The Core ECG circuit consists of both analog and digital circuitry. The ECG analog front end subsystem comprises two individually isolated and shielded
sections:
• Multifunction (MFE)/Paddles Front End, and Patient Impedance Measurement.
The MFE/Paddles section provides an ECG signal derived from the defibrillator pads/paddles for quick evaluation before and after defibrillation. This
section also provides the means for the measurement of the patient's transthoracic impedance.
• Diagnostic/Monitoring ECG.
The Diagnostic/Monitoring ECG section provides 3 Lead monitoring, 3 Lead monitoring while pacing (MwP), 5 Lead Diagnostic ECG, and 12/15/18
Lead diagnostic ECG (if this circuitry is populated). The front end detects the type of cable plugged in and configures itself accordingly.
The Core ECG digital circuitry is comprised of the following functionality:
• An isolated system interface for system clock synchronization, system communication, and programming ECG FLASH. System communication
includes transmission of ECG data, transmission/reception of commands, status, and ECG cable identification. The ECG algorithm, including internal
Sync Detect, is executed in the digital signal processor (DSP). Patient impedance is also processed by the DSP.
Analog support functions
In addition to the core ECG circuitry described above, the R Series Analog System Board contains DC power supplies, power management, and analog
support functions for the R Series defibrillator. The major functional blocks are listed below and details can be found in 9301-0506-TO.
• 12 bit serial A/D module which includes battery monitoring, CPR monitoring, power supply monitoring, barometric pressure monitoring (for EtCO
2
)
and legacy M Series accessory identification.
• Power supplies including 2VDD, S3VDD, S5VDD, -5VSS, 5V_L, V9P5 (printhead), isolated ECG_P1/ECG_P2 and isolated MFE_P1/MFE_P2 for
the Core ECG module, and isolated V12P5 and 12VA for the Core P/D module.
• Power management including reset and on/off logic.
• Pathway for external sync input/output, analog ECG out, and for 1-wire identification of R Series electrodes.