Calibration
98-148248-C Chapter 6: Configuration 6-15
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4. Click Apply.
Example: To access the web interface of the modem using HTTPS, select
HTTPS tunnel to modem (port 8443) and click Apply.
In the address bar of your browser, enter:
https://<ACU IP address or hostname>:8443
You should now see the web interface of your modem in your browser.
6.3.5 Operation in gyro-free mode
If input from a gyro compass is not available (Heading input: none), information from the
GPS position is used when searching for a satellite. If the antenna does not have ship
heading input from the vessel's gyro compass, the azimuth direction of the satellite is not
known. In this case the antenna will start a 360 degrees sky scan and scan until it finds a
satellite. The search time to find the satellite and start tracking is therefore increased
considerably. If the ship is on a steady course and sails at a speed over ground above 5 kn,
the system can use an estimated heading from the current GPS position. This will reduce
the search time, but it will still be a longer search time than with heading input present.
If the system loses the signal from the satellite, for example due to blockage, and the
duration of signal loss is longer than approximately 1 minute, the system without heading
input must do a new sky scan to find the satellite when the antenna is out of blockage.
6.3.6 Fixed TX IF principle
The SAILOR 600 VSAT Ka uses a TX IF gain concept. After calibration it provides a fixed
average gain from the TX-port of the ACU to the input of the BUC. Advantages of the fixed
TX IF gain principle are:
• Average TX IF gain independent of antenna cable length
1
• Compatibility with the TX Power control feature
When installing the SAILOR 600 VSAT Ka you make a cable calibration. At that point every
installation adjusts to the same average TX IF gain regardless of the ADU cable length.
Additionally the SAILOR 600 VSAT Ka system also compensates for variations of the cable
characteristics or loss over frequency.
CAUTION! If you remove the check marks, there is no access to the X7
and you cannot make an OTC.
1. You find the maximum allowed cable loss at Prerequisites on page 3-19.
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