Terrasat Rx 1+1, Operation Manual

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Installing the Rx 1+1 System
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3-21
Antenna Alignment
Ensure that the desired transponder is in operation.
To find the satellite and peak the receive signal,
1. Apply power to the LNB.
2. Point the antenna at an empty sky in order to determine a noise floor reference for
your equipment.
3. Sweep the antenna as close to the satellite azimuth and elevation as possible.
Note:
This must be done very slowly in order to locate the desired satellite.
4. Begin scanning in 1° increments from left to right and from up to down until you
maximize the receive level.
5. Simultaneously monitor the receive signal level at the demodulator.
Wideband signals such as video carriers are easiest to find and should be used
whenever possible. Look for a satellite beacon frequency (a stable signal used for
tracking purposes).
6. Tune the antenna and adjust its polarization according to the antenna
manufacturer’s instructions until the desired satellite is located and the receive
signal level is maximized.
Setting the Rx Frequency
All transmit and receive frequencies are set in the modem. When using a direct
connection to an L-band modem, follow the modem manufacturers’ instructions for
setting the transmit and receive frequencies.
Receive L-band Output Measurements
To check the receiver,
1. Ensure that 15 VDC to 24 VDC (LNB bias) is present at the modem or IFU Rx
input.
WARNING
When aligning the antenna, there must be no
transmission.