SPECIFICATION
Product Summary
SR812M series are our universal CATV network optical receiver with network management responder. The pre-amp adopts all-GaAs MMIC amplify and the post-amp adopts GaAs power double amplify module (This series has two models, M model RF attenuation and equilibrium adopt the continuously adjustable design, MF model with different fixed attenuation and equilibrium inserters for user option. Users can also choose more targeted high quality modules according to actual requirements). Optimized circuit design, coupled with our years professional RF design experience, the equipment achieve high performance index. It is an ideal model for CATV network.
Performance Characteristics
●High response PIN photoelectric conversion tube.
●1G bandwidth design.
●Ten bar LED optical power indicators, more accurately display the optical power.
●Optimized circuit design, the pre-stage adopts SMT processing, while post-stage adopts module amplify typical circuit that makes the photoelectric signal transmission more smooth.
●Power double output, high gain and low distortion.
●Optical AGC control, when the input optical power range is －7～＋2dBm, the output level, CTB and CSO basically unchanged.
●Can be extended with a remote network management, convenient access to the network management system.
Technique Parameter
●The technique parameters of this manual according to the measuring method of GY/T 194-2003 <Specifications and methods of measurement on optical node used in CATV systems>, and tested in the following conditions.
●Testing conditions:
Forward optical receive part: with 10km standard optical fiber, passive optical attenuator and standard optical transmitter composed the testing link. Set 59 PAL-D analog TV channel signal at range of 45/87MHz～550MHz under the specified link loss. Transmit digital modulation signal at range of 550MHz～862/1003MHz, the digital modulation signal level (in 8 MHz bandwidth) is 10dB lower than analog signal carrier level. When the input optical power of optical receiver is -2dBm, the RF output level is 108dBμV, with 9dB output tilt, measure the C/CTB, C/CSO and C/N.
●Note: When the rated output level is the system full configuration and the receiving optical power is -2dBm, equipment meets the maximum output level of link index. When the system configuration reduce (that is, actual transmission channels reduce), the output level of equipment will be increased.
Friendly Notice: Suggest you setting the RF signal to 6~9dB tilt output in the practical engineering application to improve the nonlinear index (under the node) of the cable system.
Item | Unit | SR812M-B | SR812MH-B | SR812MF-B | SR812MFH-B |
SR812M-B-1G | SR812MF-B-1G | SR812MFH-B-1G |
Optical Parameters |
Receive Optical Power | dBm | -7 ~ +2 |
Optical Return Loss | dB | >45 |
Optical Receiving Wavelength | nm | 1100 ~ 1600 |
Optical Connector Type | | FC/APC, SC/APC or specified by the user |
Fiber Type | | Single Mode |
Link Performance |
C/N | dB | ≥ 51（-2dBm input） |
C/CTB | dB | ≥ 65 |
C/CSO | dB | ≥ 60 |
RF Parameters |
Frequency Range | MHz | 45~862 or 45~1000 |
Flatness in Band | dB | ±0.75 |
Rated Output Level | dBμV | ≥105(-7～2dBm) | ≥108(-7～2dBm) | ≥105(-7～2dBm) | ≥108(-7～2dBm) |
Max Output Level | dBμV | ≥ 105 | ≥114 | ≥105 | ≥118 |
EQ | dB | 0～15 adjustable | Fixed EQ inserter（selectable） |
ATT | dB | 0～15 adjustable | Fixed ATT inserter（selectable） |
Output Return Loss | dB | ≥14 |
Output Impedance | Ω | 75 |
Generic characteristic |
Power Voltage | V | AC（130~265）V or AC(35~85)V |
Operating Temperature | ℃ | -40~60 |
Consumption | VA | ≤ 15 |
Dimension | mm | 185（L）╳ 140（W）╳ 91（H） |
