iDirect iNFINITI 3000, Руководство по установке и пусконаладке

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iDirect iNFINITI series Installation and Commissioning Guide, Release 7.0
If you are implementing a mobile remote, the white fields will all be blank. You must enter the
following information.
7.4 Perform Pulse Width Modulation (PWM) Antenna Pointing
Next, you must fine-tune the antenna pointing. You will attempt to lock onto the downstream
carrier for your network, by sweeping the antenna in azimuth, looking for a value in the range of
12 to 24 volts DC. Readings in this range indicate that you have successfully locked into the
correct satellite.
1. In Remote Location , enter the appropriate latitude and longitude values for your
current geographic location. In mobile remotes, this can be determined by your
GPS unit.
2. In Spacecraft Position , enter the appropriate longitude values for the satellite
that you are using
3. In Elevation Information , enter the appropriate Offset value for your antenna.
The offset for a 1.8 meter antenna is 22.6
°
.
The offset for a 1.2 meter antenna is 17
°
.
When all of the information is entered, iSite automatically calculates your
polarization offset, azimuth, and elevation values.
NOTE
Write these values down, or leave this screen open on your
laptop. You will need these values later to perform the initial
pointing of your antenna.
Table 7-1: Signal Strength Ranges (PWM)
Signal Strength Ranges
volts DC Antenna Status
0 – 2: Not in pointing mode, hardware problem, or off satellite
2 – 10 Detecting RF energy, but not locked on the downstream carrier
12 – 24 Locked on the downstream carrier
NOTE
You can only get a reading of >= 12 volts when you are locked
onto the correct spacecraft or network.