If one satellite has rich transponders, the transponders are located at two polarities: Vertical and Horizontal or Left Hand Circular Polarity (LHCP) and Right Hand Circular Polarity (RHCP). Regular satellite receiver can read the RF bandwidth of 950~2150MHz. There are maximum 32 transponders from 950MHz to 2150MHz.
Twin LNB may have appointed LO frequency by the satellite MSO. The two RF outputs are Vertical (RHCP) and Horizontal (LHCP), each has the bandwidth of 950~2150MHz. If the satellite total transponder number is less than 64, we can use the following solution to distribute this satellite contents to thousands of homes via fiber.
In the above drawing, GLB3500A-2T optical transmitter converts twin LNB RFs and Terrestrial TV (174~700MHz) RF into one 1550nm fiber from one building roof. The optical output of GLB3500A-2T can drive 32pcs optical receivers directly by PLC fiber splitter, where one GLB2000A optical receiver offers satellite and Terr TV signals to one STB and TV in one apartment, GLB3500A-2WR optical receiver supports one Terr TV port for multi-TVs and 4 sat STBs in one apartment. If the subscriber number is more than hundreds or thousands in the community or in the city, we shall have one optical amplifier GWA3530 after GLB3500A-2T optical transmitter. GWA3530 optical amplifier has 8 or 16 or 32 or 64 port, each port can drive 16 or 32 or 64 optical receivers. In other words, GWA3530 can drive 1024 optical receivers or 2048 optical receivers or 4096 optical receivers in 20Km fiber distance. With optional OLT input port, GWA3530 can insert satellite TV RF over the same fiber of GPON or XGPON network.
The advantages of satellite TV FTTH:
- One sat dish for 32 subscribers or thousands of subscribers
- Better Satellite signal quality at each fiber terminal
- Fiber terminal is easy installation in 5 minutes by “plug and play” design
- Regular satellite receiver
If there are more than 32 satellite transponders in each satellite polarity, the lower band and higher band (under 22KHz tone) are introduced to meet regular satellite receiver 950MHz~2150MHz frequency range. Twin wideband LNB GWB104G has 10.4GHz LO frequency and RF output bandwidth of 300MHz~2350MHz, i.e., wideband Vertical RF is equivalent to Vertical Lower (VL) and Vertical Higher (VH) while wideband Horizontal RF is equivalent to Horizontal Lower (HL) and Horizontal Higher (HH). However, wideband RF bandwidth is beyond the RF bandwidth of satellite receiver, we need Digital Channel Satellite Switcher (dCSS) chip to convert wideband RF into the range of satellite receiver. In addition, the satellite receiver must support unicable standard.
In the above drawing, GLB3500E-2T optical transmitter converts twin wideband LNB RFs and Terrestrial TV (Max 7ch VHF, 174~250MHz) RF into one 1550nm fiber from one building roof. The optical output of GLB3500E-2T can drive 32pcs optical receivers directly or thousands of optical receivers by GWA3530 amplifier. At each apartment, one GLB3500E-2WR optical receiver supports 4 unicable satellite receivers.
In Europe, there are more than 7 DTT channels (174~700MHz), we have the following drawing to distribute full contents of satellite (such as Hot Bird 13E) and Maximum 28 DTT channels.
In the above drawing, GLB3500E-3T optical transmitter converts twin wideband LNB RFs and Terrestrial TV (174~700MHz) RF into one 1550nm fiber from one building roof. The optical output of GLB3500E-3T can drive 32pcs optical receivers directly or thousands of optical receivers by GWA3530 amplifier. At each apartment, one GLB3500-3WR optical receiver has one Terr TV port for multi-TVs and one sat port for 4 unicable satellite receivers.