Last updated: 19th December 2005, Available in English, French, German, Italian, Spanish, Portugese
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This is a part of a document is intended for providing instructions on installing, operating, and field-servicing of the BusinessCom D-Star VSAT system which is basing on the ViaSat LinkStar architecture. For the complete version please contact your LinkStar-based Service Provider.
The D-Star installation procedure is generally commenced in the following steps:
Optional Steps:
Before a terminal can be operational the network control centre must be informed of certain parameters and your GPS position then the NOC (NCC) can enable your terminal. You must email BusinessCom with the default email supplied at least 2 working days before installation of terminal and send terminal installation questionnaire and enable NOC (NCC) to program system and respond with your Network IP address.
Be very careful with finding a place for installing the antenna. Find a place with south bound view is not enough. Please check the azimuth figures you have calculated, use your compass! You also have to consider the wind load. Use only the recommended antenna mounting material. Please follow carefully the instructions and assembly Manual of the antenna manufacturer. If you do not have a manufacturer's manual, please request it from your BusinessCom representative and they will e-mail you a copy immediately. Further do not underestimate the distance to obstacles. To calculate if you have enough distance, you can use the following calculation:
The azimuth, elevation and polarization tilt values can be calculated online. One of the useful AZ/EL calculators are available at http://www.satsig.net/ssazelm.htm
The Satellite Orbit value is vailable at page 7 of the current manual (Quick Reference paragraph).
Your BusinessCom sales representative can assist you with calculation and confirmation of the AZ/EL values for any of your particular installations.
Incoming signals from the satellite are intercepted by the antenna reflector ("dish") and focused into the feed assembly. The feed assembly collects receive signals and passes them to the LNB.
The anten na geometry is termed an Offset Feed Parabola, with the beam (satellite direction) typically oriented 22.6 degrees above a line perpendicular to the antenna face, as shown above. The antenna mount allows the antenna to be pointed toward the satellite by pivoting around the mounting mast (azimuth) and by tilting about the mounting head (elevation). The entire Antenna Assembly can be rotated about the feed axis to set polarization.
Note that it is not a rule that an antenna offset is 22.6 degrees. Refer to the documentation that accompanies the antenna for the actual offset specification.
Cautions:
1. Ensure installation meets all applicable cable codes, including National Electrical Code (NEC) and local requirements.
2. Do not pull IFL cables using center conductor of the coax. Cable insulation is foam; pulling by center conductor will damage electrical performance. Use full grip only.
(1) Pull the IFL cables, using good installation practices. Leave 3 meters (10 feet) of cable beyond the antenna post for adequate service loops. At the indoor end, allow adequate service loop for easy access and service of the RCST.
(2) At the outdoor end, dress the IFL cables to the antenna mounting post using one of the tie wraps (included in the installation kit) positioned 30 cm (12 inches) from the bottom of the post.
(3) Terminate cable ends with connectors to mating connectors on antenna feed assembly and RCST. Dress cable to the support arm, using tie wraps.
(4) Use standard self-fusing tape on all outdoor connections as to ensure a water-tight system. Approximately 3” of tape is required per connection.
Please be very careful with cabling and connectors. The complete LinkStar set is coming with 2 x crimp and 2 x screw able connectors from Cablecon (www.cablecon.dk). Use the connector very careful. Be informed that the power supply for LNB and BUC is provided via the cabling. Careless mounting can cause short cuts or bad connection for power supply of LNB or BUC. Make a measurement of the cable resistance.
Coax cables: All coaxial cables are 75 Ohm. All connectors are F Type. Cabling Specifications for 2W C-band or 1W/2W KU-band BUC:
IFL Length |
Cable |
Connector |
External Power Supply |
0 - 30m |
RG-6 type |
F Type |
No |
Up to 100m |
RG-11 type |
F Type |
No |
After assembly and mounting of the antenna, pre-adjust the antenna according to the elevation and azimuth figures you have calculated. Connect the LNB with the Satellite meter and fine tune the antenna to the satellite. In case you assume you found the right satellite you have to check this. You should use a analogue or a digital receiver to confirm that you receive the right satellite.
If you do not know how to calculate Azimuth and Elevation values, please contact your BusinessCom representative and they will e-mail you with an already done calculation for your specific location and satellite as well as an appropriate application for your future calculations.
The LinkStar RCST combines a DVB receiver, a burst MF-TDMA modulator, and a terrestrial traffic interface on a single integrated circuit board.
The RCST terrestrial interface is a standard 10/100BaseT FastEthernet. The TCP Acceleration processing engine is built into the RCST software as well as BusinessCom recommends it's proprietary developed PEP Accelerator. The maximum aggregate TCP data transmission rate for each RCST is 10Mbps.
The RCST comes with L-Band IF interfaces and can be rack-mounted. Depending upon the satellite link requirements, the LinkStar RCST is deployable in VSATs ranging from sub-meter 0.96m/1-Watt Ku-band units to 2.4m/.5-Watt C-band
RCST Front Display |
PWR – ON indicates the AC power witch is turned on. The AC power switch is located on the back of the RCST. The AC voltage should be 100 to 240 VAC, 60/50 Hz, 2.0/1.0 Amps.
ALM – ON indicates the RAM used by the firmware to implement the two extra PIDs has failed a critical test for software version 1.0.7. The unit must be returned to the factory for repair before it will operate with 1.0.7.
ODU – ON indicates the RCST is supplying voltage to ODU
SAT – OFF indicates no receive synchronization. BLINKING indicates receive synchronization. ON indicates receive and transmit synchronization. |
Dimensions |
1U High, 13.08” Width, 7.53” Depth |
Power |
110/220 VAC Auto-sensing, Auto-ranging |
Temperature |
0 ° to 40 ° C Operating; -20 ° to 70 ° C Storage |
Humidity |
95% relative humidity non-condensing at 0 ° to 40 ° operating; 90% relative humidity non-condensing at 65 ° C non-operating
|
Susceptibility |
EN50082-1; 1997 |
EMI |
FCC Part 15, EN50022, CE |
Safety |
UL/cUL 1950; EN60950; TUV; VDE |
Power Consumption |
125 VA |
Function |
Rear Panel Label |
Specification |
Power supply |
100-240V~ |
• 50/60 Hz • Auto-range —100 VAC to 240 VAC, IEC 320 |
ODU IF connections |
Tx OUT Rx IN |
• Tx —950-1750 MHz (L band), 75 Ohm, Type F female • Rx —950-1750 MHz (L band), 75 Ohm, Type F female |
LAN Interface |
10/100BaseT |
• 8-Pin RJ-45 Jack —IEEE 802.3 compatible. 10/100 BaseT physical interface |
Auxiliary ODU Power (future) |
AUX. ODU PWR |
• +24 VDC, 4A Max., Barrel Pin Jack (Switchcraft 712RA) |
|
Modulator Output |
Demodulator Input |
GCU |
N/A |
–35 to –75 dBm |
RCST |
–18 to –30 dBm in .125 dBm steps |
–30 to –70 dBm |
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