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The Test Traffic Measurement Service (TTM) was shut down on 1 July 2014. This information is available for historical reference.
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A good view of satellites and a precise time resolution are the essentials. For your GPS antenna, find a place that has the largest possible clear view of the sky. While choosing that place, keep in mind that you can use up to 300 meters of cat5 UTP cable in the building to reach the test-box.
NOTE 1: Do not use your existing active and/or intelligent cable switching network in the building. You may safely use existing cat5 UTP wiring through mechanical patch panels but active switching equipment would not survive the +30 V DC from the test-box to the antenna. Mechanical routing has been tested to work up to 300 meters. If you have some neighbours testing radar equipment in the next building, your mileage may vary.
NOTE 2: If you use cable other than CAT5, do not extend the unused outputs from the Trimble (pins 6 and 7, and 8 and 10, respectively). This has given interference problems in the past.
Also connect the serial port on the antenna cable with the left-most serial port on the case, using the supplied serial cable.
The test-box will not be directly accessible by the host and should be directly reachable via network once booted. You may anyway need some access for local maintenance. This would be done by plugging in a standard keyboard and a VGA monitor on the back of the testbox.
Please note that this should not be needed in absence of troubles.
Short serial-to-serial cable:
At the back of the test-box you will find three DB9 connectors. One is on the antenna interface card (black female, near four LEDs named 30V, 5V, GPS, PPS) and the others are on the middle (both male). Connect the female one and the corresponding male together using the supplied short serial-to-serial cable and the picture below.
The RJ45 connector near the serial port at the other side of the LEDs is for the UTP cable coming from the antenna. It has nothing to do with any kind of Ethernet except using the same connector type. This is not a design flaw but a choice to allow you to easily make your own custom length antenna cables. Attach it. Label the cable and port (e.g. "NON-ETHERNET", "DO NOT CONNECT ETHERNET") according to your needs.
The standalone RJ45 connector on the right is the Ethernet port. Attach the network cable from your LAN to that one.
When all connections are done, power on the test-box. Wait a reasonable time to boot if you do not watch it booting. It should come up with the network parameters that you gave us in your application form. Try pinging the test-box from several hosts. If you cannot, check your firewall parameters and other related configuration. If everything goes well, send us an e-mail to [email protected]. If you need further help, please do not hesitate to contact us.
How to interpret the LEDs on the antenna interface card
There are four LEDs, all green, on the antenna interface card. They are labeled as 30V, 5V, GPS, PPS.