ISTM-ALL MDVR-2012_Q2_Ver 1.0
14/27
2.5
Antenna (GPS/WIFI/3G) Connection
For the products with WIFI, GPS, 3G functions, the antenna will be shipped with the MDVR together to customers.
Here are some tips for antenna connection and fixation:
（
1
）
The antenna is recommended to be installed on vehicle roof (drill the hole on the roof) to get the good
signal.
（
2
）
The external protection cap is recommended for antenna to avoid human damage.
（
3
）
Each antenna cannot interfere mutually.
（
4
）
If the antenna cannot be installed outside of the vehicle (As some bus companies or bus operators do not
agree to drill a hole on the vehicle roof. In this situation, the antenna should be fixed inside of the
vehicle to guarantee the good signal.
1) How to Connect WIFI Antenna
Currently there main WIFI system includes:
（
1
）
802.11b: Speed is 11M. Frequency is 2.4G HZ. This signal distance for this system is from 200 to
400 meters.
（
2
）
802.11a:
Speed is 54M. Frequency is 5G HZ
（
3
）
802.11g: Speed is 54M and 11M optional. This system is compatible with 802.11b and 802.11a. The
frequency is 2.4GHZ, But when this system is compatible with 802.11a, the frequency is 5GHZ.
2) The Photos for Reference
3) How to Connect GPS Antenna
GPS should be installed on the roof of vehicles for good reception of satellite signals. If drilling the hole on the vehicle
roof is forbidden, then please try to get the GPS cable outside of the vehicle (please put the cable hidden)). The GPS
antenna bottom is magnetic and can be stick to the metal on the roof of the vehicle. It must be fixed by glass cement
and the antenna black side must be upward.
4)
How to Connect 3G Antenna
Attach the antenna to the vehicle window or plastic shell, but not the metal as it will affect the communication signal.
3G Antenna
WIFI Antenna
External GPS
Built-in GPS Antenna
The WIFI
antenna near
dash mounted
panel in bus
