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GPS-related issues
Q:
GPS module exists but no coordinate information?
A:
1. Check whether GPS module exists, if it does not exist check whether the hardware is
installed and in good contact.
2. Make sure that the GPS antenna contacts are good. If antenna is broken it is
recommended to be located in places with strong signal. Note that some car glass
shielding film will block GPS signals.
3. If the test is in the room, the signal of the GPS antenna in the room will be obscured.
it is recommended that the GPS antenna is placed outdoors.
Q:
Deviation of GPS location on map?
A:
It means the signal is valid if the GPS module is already positioned. There may be many
reasons for the deviation, such as government restrictions, permissible error, GPS signal
interruption, etc. The actual satellite map may have deviation for security reasons; general
map can solve the problem by using GPS correction.
3G wireless module
Q:
If I use the 3G wireless module for dial-up, what do I need to pay attention to?
A: 1. Choose the built-in wireless module WCDMA or EVDO, corresponding module settings
are not the same. The modules supported by different machines models are not the same,
so please make sure whether your module and SIM is in correspondence. Do not use
telecom SIM card on WCDMA machine.
2.Check whether the settings of the Server IP and port are correct, if the 3G signal is
strong enough for dialing and then check whether the 3G dial-up is successful or not.
3. When dialing is unsuccessful, please check the 3G antenna is in good contact. The dial
up may fail because of weak signal. Please check whether the SIM card has enough traffic,
if no traffic dial-up will be unsuccessful.
Q:
3G has no report or video, what should be done first?
A:
Press INFO key to enter the system information page, check whether the SIM card exists
and view the signal strength as well as dial-up status. Check the antenna is in good contact
and then check the SIM to see whether it is out of traffic. The most basic judgment is to
replace the SIM card. If the dial up failed with signal, then check whether the settings of
center number and the port are correct. Check whether the device number of the product is
already occupied.
Q:
3G signals is intermittent, and the video jammed?
A:
At present the signal coverage of WCDMA and EVDO is rather wide, however there are
some remote areas without signal coverage and some suburban areas have weak signal due
to the local network constraints. As a result of this it will be jammed during watching the
video, or worse case the video will not be watchable at all. The greatest impact of this
situation is from the local network. Check whether the frame rate setting of sub-stream is
too high, because the video may also be affected in a situation when the network is poor and
frame rate setting is high.
