GHREEB
24-09-2007, 03:17 AM
بسم الله الرحمن الرحيم
تحية لجميع الاخوان في هذا المنتدى الرائع اقدم لكم في هذا الموضوع كيفية تركيب مايكرويف لنك بين قاعدتي ارسال في نظم الجي اس ام وقد تحصلت عليه من احددى المواقع اتمنى ان ينتفع به الاخوان في هذا المنتدى الرائع
For Introduction, maybe I want to give briefly explanation about this things. Minilink is a kind of antenna, which is produced by Ericsson. Ericsson's Minilink 4-MMU, have a capacity up to 4 E1. It means the total traffic that can be carried by this device is about 4 x 2.048 Mbps. This device is used to connect between two Network Element in Mobile Communication System such as BTS to BTS. It operate in 7GHz frequency, with the diameter 0.6m, Gain=7dB, with maximum hoop=12 km
This is the shape of Ericsson's Minlink
http://cute_chink.blogs.friendster.com/cute_chink_/images/310507_1351.jpg
http://cute_chink.blogs.friendster.com/cute_chink_/images/310507_1354.jpg
The installation process consists of several steps and tests:
1
We have to install Minilink antenna according to the site planning. In one hoop, we need 2 antenna to build a Transmission link. So there are two site (tower) have to be installed with this antenna. In the picture below, you can see that the antenna is kind of radome antenna with mounted RAU (power amplifier). After we have installed the antenna, then we have to connect the cable on it
http://cute_chink.blogs.friendster.com/cute_chink_/images/310507_1350.jpg
2
Connect the cable (from antenna) to the MMU (modem) in door unit. It's kind of
modem which can transfer up to 8 Mbps. (4 E1). MMU has several ports, choose the coax port
http://cute_chink.blogs.friendster.com/./photos/uncategorized/310507_1334.jpg
3
Connect the MMU to the power supply. Caution: "we have to make sure the voltage phase, in order not to be reversed
http://cute_chink.blogs.friendster.com/./photos/uncategorized/310507_1333.jpg
4
Configure the site name, frequency carrier (Tx and Rx), power transmit, and sensitivity from the software interface. Note that this whole process (1 - 4) is done on the both site
http://cute_chink.blogs.friendster.com/./photos/uncategorized/310507_1337.jpg
5
After both site have been configured and UP. Now we can check and set the azimuth and elevation of the antenna, in order to get good clearance factor and the best power receive. We can monitor the receive power from software interface
http://cute_chink.blogs.friendster.com/./photos/uncategorized/310507_1407.jpg
6
We can also measure the voltage (power) level directly on the antenna using AVO meter
http://cute_chink.blogs.friendster.com/./photos/uncategorized/310507_1408.jpg
7
After the optimum power transmit and receive have been obtained, we can do Bit Error Rate test using BER meter. BER test can be done on one site, but we have to loop back MMU traffic in the other site (see the picture below). So we get the actual traffic that we have to measure
http://cute_chink.blogs.friendster.com/./photos/uncategorized/310507_1359.jpg
if the BER Transmission requirement is about 10^(-8), and the equipment capacity is 8.192 Mbps. Then we have to measure it for at least, 12.5 second in order to achieve the correct measurement. Longer we measure, then better measurement can be achieved
http://cute_chink.blogs.friendster.com/./photos/uncategorized/310507_1508.jpg
ارجو اثراء الموضوع بالنقاش واضافة مايمكن ان ينفعنا كمهندسي اتصالات تقبلو تحيتي اخوكم غريب
تحية لجميع الاخوان في هذا المنتدى الرائع اقدم لكم في هذا الموضوع كيفية تركيب مايكرويف لنك بين قاعدتي ارسال في نظم الجي اس ام وقد تحصلت عليه من احددى المواقع اتمنى ان ينتفع به الاخوان في هذا المنتدى الرائع
For Introduction, maybe I want to give briefly explanation about this things. Minilink is a kind of antenna, which is produced by Ericsson. Ericsson's Minilink 4-MMU, have a capacity up to 4 E1. It means the total traffic that can be carried by this device is about 4 x 2.048 Mbps. This device is used to connect between two Network Element in Mobile Communication System such as BTS to BTS. It operate in 7GHz frequency, with the diameter 0.6m, Gain=7dB, with maximum hoop=12 km
This is the shape of Ericsson's Minlink
http://cute_chink.blogs.friendster.com/cute_chink_/images/310507_1351.jpg
http://cute_chink.blogs.friendster.com/cute_chink_/images/310507_1354.jpg
The installation process consists of several steps and tests:
1
We have to install Minilink antenna according to the site planning. In one hoop, we need 2 antenna to build a Transmission link. So there are two site (tower) have to be installed with this antenna. In the picture below, you can see that the antenna is kind of radome antenna with mounted RAU (power amplifier). After we have installed the antenna, then we have to connect the cable on it
http://cute_chink.blogs.friendster.com/cute_chink_/images/310507_1350.jpg
2
Connect the cable (from antenna) to the MMU (modem) in door unit. It's kind of
modem which can transfer up to 8 Mbps. (4 E1). MMU has several ports, choose the coax port
http://cute_chink.blogs.friendster.com/./photos/uncategorized/310507_1334.jpg
3
Connect the MMU to the power supply. Caution: "we have to make sure the voltage phase, in order not to be reversed
http://cute_chink.blogs.friendster.com/./photos/uncategorized/310507_1333.jpg
4
Configure the site name, frequency carrier (Tx and Rx), power transmit, and sensitivity from the software interface. Note that this whole process (1 - 4) is done on the both site
http://cute_chink.blogs.friendster.com/./photos/uncategorized/310507_1337.jpg
5
After both site have been configured and UP. Now we can check and set the azimuth and elevation of the antenna, in order to get good clearance factor and the best power receive. We can monitor the receive power from software interface
http://cute_chink.blogs.friendster.com/./photos/uncategorized/310507_1407.jpg
6
We can also measure the voltage (power) level directly on the antenna using AVO meter
http://cute_chink.blogs.friendster.com/./photos/uncategorized/310507_1408.jpg
7
After the optimum power transmit and receive have been obtained, we can do Bit Error Rate test using BER meter. BER test can be done on one site, but we have to loop back MMU traffic in the other site (see the picture below). So we get the actual traffic that we have to measure
http://cute_chink.blogs.friendster.com/./photos/uncategorized/310507_1359.jpg
if the BER Transmission requirement is about 10^(-8), and the equipment capacity is 8.192 Mbps. Then we have to measure it for at least, 12.5 second in order to achieve the correct measurement. Longer we measure, then better measurement can be achieved
http://cute_chink.blogs.friendster.com/./photos/uncategorized/310507_1508.jpg
ارجو اثراء الموضوع بالنقاش واضافة مايمكن ان ينفعنا كمهندسي اتصالات تقبلو تحيتي اخوكم غريب