The Patient Session
3-26 ST80i Stress Test System Instructions for Use
The source signal of the analog ECG and TTL Sync for each output channel can be selected by
software from any of the available ECG leads separately. The amplify ratio for the Analog
ECG Output can also be configured independently.
To change Analog and/or TTL Output settings during a patient session, see “Gear (Quick
Settings)” on page 2-30.
To configure Analog and TTL Output, see the ST80i Installation and Configuration Guide.
WARNING Both analog ECG output and TTL sync output are not in real time: there is a delay between the
patient’s physiological activity and the appearance of its representative signal at the external port.
This signal should not be used for analysis.
NOTES ST80i monitors interference and signal strength and automatically selects a clearer frequency band
when excessive interference exists.
Software design also ensures that the waveform or lead label can be correctly displayed, stored, and
printed, to avoid data conversion or lead combination errors.
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