COBHAM SEA TEL 9711IMA-70, Руководство по установке

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9711IMA-70 Setup – Tracking Receiver – VSAT
6-1
6. Setup – Tracking Receiver – VSAT
6.1. Determining the IF Tracking Frequency (MHz)
The IF Tracking frequency parameter is a value entered into the MXP MHZ Sub-Menu. The value itself may be
provided by your air-time provider and the MHz value will be entered directly in this sub-menu.
Or, the RF downlink frequency of a specific carrier on the desired satellite can be obtained from a satellite website
and calculated by using the formula RF- LO = IF. When you take the Satellite Transponder Downlink RF value and
subtract the LNB’s Local Oscillator (LO) Value, the resultant value will equal the Intermediate Frequency (IF). It is
this IF value that will be entered into the MXP for tracking purposes. The MHz and KHz are entered as a single
value.
Example: Assuming an LNB LO value of 11.25GHz: We want to track a satellite downlink carrier at 12268.250
MHz.
12268.250 MHz – 11250.000 MHz = 1018.250 MHz IF
1. Enter the entire six digits of the “megahertz
and kilohertz” is simply entered as one value.
This is done in the Position Antenna screen.
6.2. SAT SKEW
SKEW is used to optimize the polarization of the feed to the desired satellite signal. It is entered when a known
satellite is skewed.
1. Use Polang to peak the polarity.
EAR Controlled - ECCN EAR99