Source: Li Yuanlin
The author loves radio, electronic control, and is now retired and fell in love with stars. Due to the "Electronic News" 2012 No. 19 published "Test 95? E New Tianxing No.6 US National Defense Channel". I am very interested in thinking that in 9 stars, the new Star Two-star is only 2.8 ?, can make a pot of two-star reception. So use a 45cm deflection antenna with a hand, and the early production open door is 9. Receiver, star 3173 satellite receiver and 2 inch black and white television set into two stars received, location in Foshan. Take the above equipment to the top of the building, install a pot, and the pot top is temporarily set to 520mm. The 9-specific high frequency head and 11300 MHz frequency head are connected to the two receivers. First, the middle 9 high frequency head is joined into the pot. The TV sound video plug first inserts the open-door red machine and turn the open red power. Remote control enters system settings. 88% signal strength appears after confirmation. The signal quality is 0. Slowly turn slowly from south to the west. Soon the azimuth and elevation angle. The ultimate quality is 80%. Notice. Need to mark the antenna base and the ground. Since the opening is the old machine that is not upgraded. After searching, only 5 sets of CCTV and Tibet Tibet are received. Remove the 9th high frequency head to replace the bipolarization 11300MHz high frequency head, add the audio and video line on the edge of the star, boot remote control Enter the satellite setting New (new star) interface. Use the tabs to set up: Double vibration switch is open. The local oscillation frequency h, V is 11300MHz, and the longitude 95 ?, the cursor is moved to the determination, and the new satellite serial number N and the upper set parameters will appear in the satellite list. After exiting, press the F1 key to observe the number of sequence numbers and related parameters of the program. If it does not match, press or change to avoid changing the settings of other stars. The correct subsection is determined to be 1264. MHz, the symbol is 28000bps. The antenna is polarized to the horizontal H. Turning the antenna to south, and the circumference of the circumference is about 5 RN, which has a signal quality reaction, and the signal strength is 75. The surface line is counterclockwise rotates high frequency heads about 30? The signal quality has risen sharply. The elevated link is then compressed 10 mRn. The ultimate quality is 73%. At this point, the option is shifted to the determination. After the remote control confirmation, the host searched two sets of programs, and the other 10 sets did not know. Then use the F4 key to run automatic search and receive the twelve programs. On this basis, it remains unchanged, and the audio and video plug is added to 9 machines on and turned on. Handheld 9 high frequency heads close to the 11300 MHz high frequency head and move slowly. When moving to the right, there is a signal, with a reference movement of about 10 mm in the front end surface of 11300 MHz, further close to the high frequency head of 11300MHz, and 9 signal quality up to 45%, fixed with adhesive tape, see pictures. Back to see the number 6 signal quality of the new day is 48%, and the AV jack will be properly watched after exiting the two. On a large TV, the video 1, video 2 can be changed. The experiment ended. There are two or more points of experiments to improve: 1. Due to the 9 high frequency heads in this experiment. If the high frequency header of the change in volume can reduce the occlusion of the antenna and improve sensitivity. 2. When the feedward focus is not changed, a variable angle is machined, and the distance of the double star clamp will bring convenience to debugging. If you match the finished double star fixture to make debugging easy. It is believed that after two ok improvements, the signal quality of the two stars will be further improved.
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