Understand and grasp the light transmitter structure, operation principle and performance parameters, on cable TV skills personnel is very important, as long as the grasp of the basic operation principle of the equipment and skills performance goals, to be effective reasonable selection of equipment and do well the usual care.
Now produces light hair factory many, both at home and abroad, more brand category, performance goals and single quotation also vary widely, carries on the reasonable selection to ensure the quality of the optical fiber network and decline of how capital has great advantages.High performance price ratio and reliable quality ensure system, excellent after-sales service guarantee to pick light equipment should comply with the rules.
1, choose is examined by the state, and by the state administration of radio detection qualified goods.
2, reasonable selection of 1310 nm and 1550 nm light transmitter operating wavelength.Town level optical network transmission interval nearly best choose 1310 nm wavelength light hair, less investment, on the transmission interval newsletter, points of light and the contrast of many optical fiber network, choose 1550 nm wavelength light hair as well, the total contributive to less than 1310 nm light plant network.
3, laser is the center of the light hair, light hair, the choose and buy should first pay attention to the selection of laser, the user can specify choose autor, lucent, Fujitsu, laser, etc.
4, investigate the performance parameters of hair light, watch the production technology level in the machine.
5, on the basis of the optical fiber network planning business accounting of the total power required, reasonable combination that light of the Numbers and the output power of each stage light hair, such as the accounting optical network 10 mw2, 12 mw1, users choose and buy 2 10 mw light hair machines, 12 mw1 units.
6, light power wattage intrusive concluded that, after the main transmitter link loss.From mathematics, numerical power contact link loss values are corresponding to interchangeable, such as the 6.5 mw can be reduced to 8.13 DBM, if know that link loss value is 8.13 DBM, but the corresponding conversion of 6.5 mw.
The transmitter output power and light hair not corresponding to the conversion relationship between link loss.Transmitter link loss of DBM value only the skills of making and using the equipment and relevant.That said 6 mw link loss characteristics of light hair, not necessarily is 7.78 DBM, may be DBM 8 or 9 DBM.Different manufacturers, because choose skills, components and processing technology is not the same, the same power of the optical link loss is not the same.That is the same manufacturer, because components and processing technology is not the same, the same power transmitter link loss is not necessarily the same.So when choosing a launch machine, can't only look at the power value, don't care about link loss value, should be refer to the number of power, main is to look at the transmitter link loss value.Must be the same in the same transmission channel number, C/N, CTB and CSO target condition, compare the different manufacturers produce optical link loss machine.As A manufacturer to produce 8 mw of optical link loss for 9 DBM, and B factory produces 8 mw transmitter link loss for 10 DBM.We should choose B manufacturer produces 8 mw light hair.
7, thinking from the aspects of link loss using less than 10 mw light hair good contrast, use less as far as possible more than 16 mw light hair.
8, pay attention to the performance price ratio, selection of good quality, price and cheap light hair.
9, choose good after-sales service company or manufacturer.
This paper released by Wan Shuo optoelectronic equipment co., LTD.