BESTOS-2500 FIELD OPTICAL WORK STATION

1.low-noise PHILIPS push-pull amplifier module
2.Four independent forward and reverse channels

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:

1.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)

2.With plug-in combining filter, fixed attenuator, on-line test port, to make the modulation more convenient

3.With four high-level outputs and low distortion

4.Four independent forward and reverse channels, which can be modulated independently

5.Modularized design for the internal devices for easier upgrading and maintaining

6.High-reliability switch power supply, strict anti-thunder system, to make sure that the unit can operate stably through a life-long time

7.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

8.Net management responder can be installed to have the intelligent net management function(this function is reserved for users)

9.Structural techniques is compact and reasonable ,with high-stability performance and convenient modulation

10.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