LB Multi Channel CATV Receiver
LB series multi channel CATV receiver, features 47~862MHz bandwidth, output level from Vo=88dBμV（4Ch Pin=-2dBm）to Vo=103dBuV (2Ch Pin=-2dBm), suitable for FTTP, FTTB, FTTN, FTTC, as RFTV broadcast network’s RX unit. With the special low noise matching circuit Under 3.8% modulation, very low optical power is needed to achieve 45dB CNR. When transmitting in full channels and with receiving power of -10dBm, the CNR can still reach high index of 45dB.
The product built-in RF inter-stage gain adjustment. All receiving optical power in the range of +3dBm to -12dBm has good linearity. According to different receiving optical power, the user can choose high CNR and suitable output level.
The following options are available for different applications.
-F: built-in channel filter, RFTV operating in1550nm wavelength.
-C: built-in CWDM, RFTV operating in 1550nm wavelength, and reach GEPON ONU through 1310/1490nm wavelength.
- Miniature design with multiple outputs.
- Extra-low noise (3.8% modulate, -10dBm receive, CNR ≥ 45dB)
- Receiver Optical power in the range of +3dBm to -12dBm with excellent linearity
- RF 47~862MHz with good flatness (FL≤±1.0dB)
- Built-in inter-stage gain adjustment, high CNR and suitable output level can be achieved according to different receiving optical power.
- Zinc. die-casting metal housing
- Low power consumption, high cost performance
| Optical specifications | Remark | ||
| Operating wavelength | nm | 1210~1600 | LB4CR4888 |
| 1260~1600 | LB4CR48100 & LB2CR48103 | ||
| 1540~1560 | -F & -C Options | ||
| Input wavelength | nm | 1310, 1490/1550 | LB4CR4888-F & -C |
| Pass wavelength | nm | 1310, 1490 | LB4CR4888-F & -C, LB4CR48100-C, LB2CR48103-C |
| Channel isolation | dB | >40 | -F & -C options |
| Responsivity | A/W | >0.85 | 1310nm |
| >0.9 | 1550nm | ||
| Receiving power | dBm | +3~-12 | |
| Optical return loss | dB | >55 | |
| Optical fiber connector | SC/APC | LC/APC for -C option | |
| RF specifications | |||
| Work bandwidth | MHz | 47-862 | |
| Flatness | dB | <±1.0 | |
| Output level | dBuV | 88.0 | Pin: -2dBm, LB4CR4888 |
| 100 | Pin: -2dBm, LB4CR48100 | ||
| 103.5 | Pin: -2dBm, LB2CR48103 | ||
| Output level adjustment | dB | 0~18 | MGC |
| Return loss @ 47-862MHz | dB | 14 | 47~862MHz |
| Output impedance | Ω | 75 | |
| Output port number | 2 | LB2CR48103 | |
| 4 | LB4CR4888 & LB4CR48100 | ||
| RF tie-in | F-Female | ||
| Test channel | Ch | PAL D/59Ch | NTSC /80Ch |
| OM1 | % | 3.8 | |
| CNR1 | dB | 56.6 | Pin= -2dBm |
| CNR2 | dB | 48.5 | Pin= -8dBm |
| CTB | dB | <-63 | Vo<88dBµV-LB4CR4888 Vo<100dBµV-LB4CR48100 Vo<103.5dBµV-L2CR48103 |
| CSO | dB | <-63 | |
| HUM | dB | <-60 | |
| General specifications | |||
| Power supply | V | DC +12V | LB4CR4888 |
| DC +24V | LB4CR4100 & L2CR48103 | ||
| Power consumption | W | <3 | +12VC, 190mA for LB4CR4888 |
| <10 | +24VC, 400mA for LB4CR48100 & L2CR48103 |
||
| Working temperature | ℃ | -20 ~ +50 | |
| Storage temperature | ℃ | -40 ~ +85 | |
| Humidity | % | 5-59 | |
| Dimension | mm | 118×73×29 | LB4CR4888 |
| 133×65×58.5 | LB4CR48100 & L2CR48103 | ||
| Part number | RF Output power (dBuV) | Number of RF outputs |
| LB2CR4803-cdd | 103 | 2 |
| LB4CR4888-cdd | 88 | 4 |
| LB4CR4800-cdd | 100 | 4 |
| c: | C | 1310/1490 & 1550nm CWDM filter |
| F | 1550nm filter | |
| dd: | SA | SC/APC |
| LA | LC/APC |