GlobalTime NTP Products
User manual of GTT-030
6
Table 2-1 Antenna Specifications
Frequency range
1575
±
5MHz;
RF connector
N-type connectors
Polarization
Right-hand
circular polarization
Installation
Thread
(M24
×
1.5)
connection
Antenna gain
≥
3.5dB
；
Volume
φ
96
×
126mm
；
Amplifier gain
≥
37dB
；
Operating
temperature
-45
℃
～
85
℃
；
Noise coefficient
≤
1.5dB
；
Storage
temperature
-50
℃
～
90
℃
；
Interference
suppression
25dB(f0
±
100MHz)
；
Humidity
0
～
100%
Power consumption
3V
×
20mA
；
2.3
Indoor installation
After connecting 220V AC to the master device, the indicator light "Power" on the front panel should be
lit and indicate that the running of power supply is normal. Then the status light starts to be yellow (red
and green) and estinguishes in 1 minute. If GPS receiver is in good running, it will turn green
about 15
minutes later and the system starts to work normally. To measure the BNC antenna socket with a
mutimeter, the feed voltage should be up to 5V. Then connect the antenna cable with the antenna socket.
Next, use a computer to pass through the IP address and network settings of the serial port configuration
time server, save and exit, then restart GTT - 030 Network time server to make the network settings take
effect. After reboot, input the IP address of the PING server in another computer to check the network
settings correct or not. Then log on the network time server from SSH client to
observe the satellite
receiving state, the information on time tracking state of the server and so on. When the server locks the
satellite time ( The indicator light on the panel turns green), GTT - 030 starts to provide time information
to other clients within the network. The specific process of software configuration can refer to the
following chapter.
