HTC VIVE Tracker 3.0 Developer Manuallines page 7

GPIO Pin Electrical Characteristics (Supply voltage VDD = 3.3 V)
Symbol
V High-level output voltage
OH
V Low-level output voltage
OL
V High-level input voltage
IH
V Low-level input voltage
IL
I High-level output current
OH
I Low-level output current
OL
I High-level input current
IH
I Low-level input current
IL
To establish a stable wireless connection between the VIVE Tracker (3.0) and the dongle, the
OTA performance of VIVE Tracker (3.0) cannot degrade to more than 3dB when an accessory
is attached to the VIVE Tracker (3.0).
The following are recommendations for better RF performance.
.
Figure: Illustrates the "keep out" area where only nonmetallic parts of the accessory should be inside (spherical
VIVE Tracker (3.0)
HTC Corporation
Parameter
radius = 30 mm with the center being the antenna feed point)
Developer Guidelines
Min Typ
VDD - 0.4 --
-- --
0.7VDD --
-- --
--
--
-1 0.5
-1 0.5
4
12/16/2020
Max
--
0.4
--
0.3VDD
2
2
1
1
HTC Confidential and Proprietary
V1.0
Unit
V
V
V
V
mA
mA
nA
nA