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Sensor ReadyState Verification Test

This automated WHCK test ensures the target sensor device/s enters the ‘Ready’ state within the expected time. For the expected ready state times for different sensor devices, refer to the table in More information (the table can also be found in the requirements doc).

For GPS sensor device, the test performs both HOT FIX test and COLD FIX testing. For the Hot Fix and Cold Fix times, please refer to the table in More information. The Cold Fix or the Cold Start test is repeated 5 times and the criterion for passing is 80%

Test details

 

Associated requirements

Device.Input.Sensor.ALS.SupportRequiredData
Device.Input.Sensor.Base.SupportDataTypesAndProperties

See the device hardware requirements.

Platforms

Windows RT 8.1
Windows 8.1 x64
Windows 8.1 x86

Expected run time

~2 minutes

Categories

Basic
Certification

Type

Automated

Running the test

Before you run the test, complete the test setup as described in the test requirements: Sensor Device Testing Prerequisites.

If this test is being run against a GPS sensor device node, make sure that you are running the test in an environment in which you can receive a GPS signal.

Troubleshooting

For troubleshooting information, see Troubleshooting Device.Input Testing.

More information

Sensors shall not transition to the SENSOR_STATE_READY state until valid data is available.

Sensors must complete power-up initialization tasks and transition to the SENSOR_STATE_READY after being opened by a client or resuming from system standby within the following times:

 

Sensor Type Maximum time allowed to enter ready state

Accelerometer

1 second

Gyrometer

3 seconds

Compass

3 seconds

Inclinometer

3 seconds

Orientation sensor

5 seconds

Ambient Light Sensor

2 seconds

GPS

See the following table

GPS Startup requirements under clear sky conditions:

 

Startup type Time elapsed from position request (in seconds) Acceptable sensor states Acceptable error radius

Cold start

0

SENSOR_STATE_INITIALIZING

n/3a

Cold start

45

SENSOR_STATE_READY

Under 50 meters

Warm start (powered off with assistance

0

SENSOR_STATE_INITIALIZING

n/a

Warm start (powered off with assistance

10

SENSOR_STATE_READY

Under 300 meters

Warm start (powered off with assistance

20

SENSOR_STATE_READY SENSOR_STATE_READY

Under 50 meters

Hot start

0

SENSOR_STATE_INITIALIZING or SENSOR_STATE_READY depending if fix was maintained

Under 300 meters

Hot start

2

SENSOR_STATE_READY

Under 50 meters

Cold Start TTFF: Time Unkown, Current ephemeris unknown, position unknown.

Hot Start TTFF: Time known, Almanac known, Ephemeris known, Position within 100km of last fix.

GPS devices shall be able to acquire first fix under two seconds when 1) The radio is on, 2) Flight Mode is off, and 3) Under clear sky conditions.

GPS devices under clear sky conditions shall be able to report position from a cold start within 45 seconds.

A-GPS devices shall be able to report position within 10 seconds with 100-300 meter accuracy and within 20 seconds with 30 meter or less accuracy.

Location device shall be in initializing state after it is enabled and change to ready after acquiring the current position.

Location devices shall fire valid location data events with valid location data when in the ready state.

Location devices shall not fire data events when the device is not in either ready state or initializing state.

표시:
© 2014 Microsoft