PCA Descriptions
6-4 Theory of Operation
SpO
2
PCA
The SpO
2
PCA serves as the interface to the SpO
2
sensor, including:
z Generation and control of voltages to drive the LEDs in the sensor.
z Receiving and processing the signals from the SpO
2
sensor.
Battery PCA
The Battery PCA provides the contacts with which the battery mates. It also
has the main fuse, and it provides the function of detecting whether the
installed battery is an M3516A battery or not (see "Contacts/Battery Type" on
page 6-12). It also detects the temperature of the battery.
Battery
The M3516A battery differs from similar batteries in that it is capable of pro-
viding much higher current without causing an internal protection device to
open and disconnect the battery.
Power Supply
The Power Supply provides regulated DC power to the unit and charges the
battery.
Printer
The printer provides hard copy output of text, waveforms, event data, etc. It
senses when the paper is out, or the door is left open.
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