Alice PDx

Specifications

Physical characteristics

Physical characteristics

Size	5 L x 3 W x 2 H (12.7 x 7.62 x 5.08) "/cm
Weight	Approximately 8 oz (230 grams), weight does not include batteries

Channels

Channels

Total channels	Up to 21 with Optional EXG and ExG Yokes channels
Standard channels	Pressure Based (w/snore) and Thermal Airflow, zRIP Effort (2), Body Position, SpO2 (also Pleth and Pulse Rate), Respironics Therapy Device Parameters, Pressure and Flow from non-respironics therapy devices. channels
Optional Yokes/Channels (a)	ECG Yoke; 3-lead ECG providing 3 measured and 4 derived channels for a total of 7 channels
Optional Yokes/Channels	ExG Yoke: 4 Neuro Channels (EEG or EOG) and 3 Differential EMG, plus references and ground.

Input impedance

Input impedance

EMG	2 Mω per Electrode 4 Mω differential
ECG	10 Mω per Electrode 20 Mω differential
EEG	2 Mω per Electrode 4 Mω differential

Bandwidth

Bandwidth

ECG (a)	0.318 to 81 Hz
EEG b	0.318 to 35 Hz
EMG a	9.7 to 86 Hz

Input Signal Range

Input Signal Range

ECG b	± 4 mV
EEG c	± 500 µV
EEG d	± 150 µV

Digital Resolution

Digital Resolution

Up to	16 bits

Initial Sample Rate

Initial Sample Rate

Up to	1 Hz

Max Storage Rate

Max Storage Rate

ECG/ExG	200 Hz
Effort and Thermal Flow	100 Hz
Pressure Flow	200 Hz
Snore	500 Hz
Body Pos.	1 Hz

Communication interfaces

Communication interfaces

Serial Protocol	USB PC cable
SleepLink and Serial	communication cables for our therapy devices

System Power Requirements

System Power Requirements

Alkaline batteries	Three AA (1.5V) 0.43 watts typical