low-noise DFB laser at the reverse transmitting part, low-noise PHILIPS push-pull amplifier module at forward stage
Summary:
OS-2500 is field bidirectional optical receiving equipments, developed and researched especially for metropolitan area networks; with building block design for the whole structure, and nice flexibility to meet user’s networks requirements; with excellent detecting circuit, networks system which is compatible with HMS standards, and to monitor the networks through network responder.
Features:
l Adopt the high-sensitivity optical detector at the receiving parts, low-noise DFB laser at the reverse transmitting part, low-noise PHILIPS push-pull amplifier module at forward stage and PHILIPS power-doubled amplifier at the backward stage( designed according to users’ requirements)
l With plug-in combining filter, fixed attenuator, on-line test port, to make the modulation more convenient
l With four high-level outputs and low distortion
l Four independent forward and reverse channels, which can be modulated independently
l Modularized design for the internal devices for easier upgrading and maintaining
l High-reliability switch power supply, strict anti-thunder system, to make sure that the unit can operate stably through a life-long time
l Inset excellent channel separation circuit to reduce to the mini rate the cross talk of the forward signal, backward signal and the net management signal
l Net management responder can be installed to have the intelligent net management function(this function is reserved for users)
l Structural techniques is compact and reasonable ,with high-stability performance and convenient modulation
l Water-proof aluminum-cast shell and nice heat loss function can make the unit work in terrible surroundings
Parameters
Items | Units | Parameters | |
Forward optical receiving part | |||
Optical parameters | Optical receiving power | dBm | -6~+2 |
Optical wavelength | nm | 1290~1600 | |
Return loss | dB | ≥45 | |
Optical connector |
| FC/APC or SC/APC | |
Optical fiber |
| Single | |
Link parameters | C/N | dB | ≥51 |
C/CTB | dB | ≥65 | |
C/CSO | dB | ≥60 | |
RF parameters | Frequency rage | MHz | 45/87~750/870 |
Flatness in band | dB | ±0.75 | |
Output level | dBuV | ≥108 | |
Input return loss | dB | ≥16(45-550MHz); ≥14(550-870MHz) | |
Output impedance | Ω | 75 | |
Reverse optical transmitting part | |||
Optical parameters | Optical wavelength | Nm | 1310±10 |
Optical output power | mw | 1-2 | |
Optical connector |
| FC/APC or SC/APC | |
RF parameters | Working frequency | MHz | 5-30/42/65(according to users’ requirements) |
Flatness in band | dB | ±0.75 | |
Input level | dBuV | 75~85 | |
Input return loss | dB | ≥16 | |
Output impedance | Ω | 75 | |
Noise-power ratio(NPR) | dB | ≥10(NPR≥30) | |
Common indexes | |||
Working temperature | °C | -40~60 | |
Working voltage | V | 35~90 or 135~270(AC 50Hz) | |
Storing temperature | °C | -40~65 | |
Relative humidity | % | Max 95% no condensation | |
Power consumption | W | ≤60 | |
