Radio frequency optical fiber transmission optical workstation for two-way network transformation of cable television
A technology of cable television and two-way network, which is applied in radio frequency optical fiber transmission optical workstation, hybrid optical fiber coaxial cable network two-way network transformation, based on the field of cable TV two-way transmission equipment, can solve the problem of destroying uplink channel data transmission, high average cost per household, video Image distortion, voice and other problems
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[0034] see figure 2 : The connection between the wavelength division multiplexer and the optical module is to separate the optical signal from the front end of the cable TV. One channel of the downlink wavelength 1550nm and the uplink wavelength 1590nm optical signal is connected to the optical module, and the other channel of the downlink wavelength 1490nm and the uplink wavelength 1310nm optical signal is connected to the PON optical signal interface.
[0035] see image 3 : The optical module consists of a downlink optical receiver and an uplink optical transmitter. The optical module is JZPI-PL. The optical module is connected with a wavelength division multiplexer to transmit the downlink wavelength 1550nm optical signal to the downlink optical receiver of the optical module. The uplink optical transmitter sends the 1590nm optical signal to the wavelength division multiplexer.
[0036] see Figure 4 : The downlink signal optical automatic gain control circuit is withi...
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