Chapter 3. Internet Services; Tcp Client - Javad HPT404BT Operator's Manual

I
NTERNET SERVICES

1. TCP client

TCP client service is used to receive RTN corrections from the specified TCP server via GPRS network.
The downloaded RTN corrections are routed to the communication ports (UART, USB, BT) and/or
broadcasted by UHF transmitter to multiple UHF receivers. Using this service it is possible to provide the
local GPS receiver (connected to UART, USB or BT) and remote UHF receivers (for example the
receivers which are not equipped with GSM/GPRS module) by downloaded RTN corrections
simultaneously. To restart the TCP client after next boots automatically the RTN auto running feature can
be used (refer to RTN AUTORUN command's description).
Example of TCP client configuration:
Let's assume we need to download RTN corrections from the TCP server which has the
following parameters:
• IP address – 92.43.102.1;
• Port – 3615;
• Login – user;
• Password – pswd.
The TCP client should download corrections from TCP server, route them to UART and
broadcast by UHF transmitter simultaneously. Suppose the parameters of UHF transmitter are as
follows:
• Wireless protocol – JAVAD GNSS Transmitter;
• Output power – 25 dBm;
• Modulation – DQPSK;
• Channel spacing – 25 kHz;
• Frequency channel – 1;
• Scrambling vector – 255.
The following is the step by step configuration of HPT404BT to configure and run described
TCP client:
Configure the UHF modem
Select the TCP client as an active RTN service
Set the host name/IP address to connect
Set the host port of remote machine
www.javad.com
Internet services
TCP client
LINK PROT 2
LINK PWRB 25
LINK MOD 2
LINK SPACE 0
LINK CHAN 1
LINK SCRAM 255
RTN TYPE 0
RTN HOSTNAME
92.43.102.1
RTN HOSTPORT 3615
25