Fiber to the home ( FTTH ) broadband access is the ultimate
development goal, optical receiver is the target terminal products
for this goal.
This device adopts technology of high isolation WDM in order to
separate CATV and ONU signal. Further more, it also adopts low
optical power receiving and RF-AGC control technique, which could
achieve the requirement of ≤-9dBmCATV receiving for FTTH.
The optical power receiving monitoring indicator LED ( ≥-15dBm) is
provided on the pane and it supports RF outputs constantly ,
convenience of customers use, which is the ideal receiver equipment
for FTTH.
2. Main Performance Parameters
| Item | Unit | Performance Parameter |
| Optical characteristic | input wavelength | (nm) | 1310,1490,1550 |
| Output wavelength | (nm) | 1310,1490 |
| CATV operation wavelength | (nm) | 1540～1560 |
| channel separation | (dB) | ≥40(1310/1490nm and 1550nm) |
| response | (A/W) | ≥0.9 |
| receive power range | (dB) | +2～-18 |
| reflection loss | (dB) | ≥55 |
| fiber linker | / | SC/APC |
| RF characteristic | Bandwidth/flatness | MHz/dB | 47-860/≤±1 |
| output level | dBuv | 70±1/(-4～-13dBm) |
| output level adjustment | dB | 0～-18 |
| reflection loss | dB | ≥14(75Ω characteristic impedance) |
| RF output interface | / | Metric (one way output) |
| CNR/MER | dB | ≥44/34(PAL-D 60CH,OMI3.8%,-9dBm) |
| CTB/CSO/HUM | dB | ≥65/≥60/≥60(-1dBm receive) |
| Other requirement | power supply/consumption | V/W | External AC155～255V→DC12,/5 |
| working/storage temperature | ℃ | -35～50/-40～75(humidity 5～90%) |
| size | mm | 130×60×22 |
3. Direction for Use
3.1 Power Input
POWER IN:It is the external power supply input port, First should
be the DC+12 V external voltage stabilizer output line connected to
the device POWER IN,than put DC+12V external mano-stat insert
100/240 V,DC12V Face posted power light, show power part is
regularly working.
3.2 Optical Fiber Input
OPTICAL IN:It is input interface of optical signal,In optical
access should clean APC TOP by alcohol ,than align adapter sunken
mouth,fiber mouth march link;When optical signal accesses (≥-15dBm)
then lights on in panel, which shows optical part is regularly
working;ONU is 1490/1310nm connection interface, please do not take
off the cover before you use.
3.3 RF Output Level Adjustment
RF OUT:It is RF output port,when optical input -4～-13dBm,RF output
70dBuv±1；ADJ:it is RF Output level attenuator, default value is the
minimum.When the output level and the design requirements has any
deviation, it can adjust the attenuation amount, with the design
requirements.This device is low optical power receive, suggest-12
~-9 dBm advisable.
