产 品 说 明                                                                                                                    

 

 

激光发射机 双波段CATV+RF发射机+8dBm

The EMLT-1550-WM series of laser transmitters is designed for use with dual-band transmission applications. Based on our patented design, the EMLT-1550-WM incorporates two sets of laser transmitters with 1U rack mount chassis. There are two transmission bands: a standard CATV band and RF band with 12,000MHz bandwidth.

The CATV band transmitter operates as a standard HFC laser transmitter with a frequency range from 45MHz to 860MHz. It is designed for electrical to optical conversion of CATV signals such as AM-VSB, FM and QAM signals. It can transmit up to 65km in distance, while providing excellent CNR, CSO and CTB performance.

The RF band transmitter can perform electrical to optical conversion from 950MHz to above 12,000MHz. Depending on the model, EMLT-1550-WM can also be used for transmitting almost any type of RF modulated signals over optical fiber that include Microwave over Glass, satellite / IF signal, microwave link, WiMax /Mobile signals over fiber.

EMLT-1550-WM series is highly versatile, and high-bandwidth transmission solution for numerous RF signal over optical fiber applications. They are available either single output or dual output model. The output of dual out put can be combined into single output fiber.

 

Features:

- Slim 1U height rack mountable housing

- Two independent transmitter design, each incorporating:

* High power, narrow linewidth DFB laser module

* Broadband external modulator

-Dual-band transmission:

* CATV: 45MHz to 860MHz for analog and QAM channels

* RF: 950MHz to 12,000MHz

- SBS suppression level selectable between +13dBm to +16dBm

- Separate input port for CATV and RF

- 65km standard transmission range

- AGC (Automatic Gain Controls) Input Control for CATV band

 

Model Number

EMLT-1550-WM-08



Technical Specifications




Transmission Range

Up to 65km



Laser Wavelength Range

1550nm ± 10nm (standard), available with 40 DWDM wavelengths



Optical Output Power

8dBm minimum



Number of Optical Output

2, separate output for CATV and RF



Noise Bandwidth

45 to 860MHz for CATV band and 950 to 12000MHz for RF band



Carrier Noise Ratio (CNR)

> 53dB (Direct), >52dB (w/EDFA)



Composite Second Order (CSO)

-63dB minimum



Composite Triple Beat (CTB)

-63dB minimum



SBS Suppression Level

+13.5dBm, 16.5dBm (Optional)



RF Gain / OMI Adjustment Range

+8dB to -8dB for CATV band



Input RF Power Level

15 - 25 dBmV for CATV band



Frequency Plan

CATV + QAM + RF



RF Frequency Range

45MHz - 870MHz for CATV; 950MHz-15,000MHz for RF



Flatness in Frequency Range

+/- 0.75dB in CATV band, +/- 3dB for RF band



Input RF Impedance

75 Ohm for CATV, 50 Ohm for RF Band



Input RF Return Loss

16 dB minimum for CATV, 10dB for RF Band



Mechanical Specifications




Operating Temperature Range

0°C to +50°C



Storage Temperature Range

-40°C to +70°C



Power Consumption

120 W maximum



Power Supply

80 -240 VAC, 43 - 62 Hz



Housing Dimensions

19″ x 14″ x 1.75″



Front Panel Display

LCD



Control / Monitoring

DFB laser temperature, output power



Alarm Status

Over temperature, over current



Optical Connectors

F Type for CATV band, SMA Female for RF band

Technical Specifications