- 1550 nm 2-way (VOD) CATV external modulation fiber optical transmitter is a high performance 1550nm direct modulated inter-cut (narrow-bandwidth multiplex) optical transmitter which design and manufacture specially for realizing two-way television interact operation (VOD) for CATV network, mainly used in second service area to inter-cut IP/QAM or local program. In the content distribute network system (CON), this model is the VOD flow rate loading equipment, also often called the edge IP/QAM optical transmitter.
- Fiberbit according to the multi-year application experience in inter-cut system designed all the functions for VOD1504 that Overlay need, which make it convenient for customers to apply and debug.
- Build-in WDM, realizing the multiplex of main signal and inter-cut optical. The panel with main signal optical input port and join-wave output port can extra simplify the connection.
- Build-in electronic-control VOA, customer can set the optical power ratio of inter-cut and main signal according to system demand. After setting, the whole unit system software can in line with the change of main signal optical power, via VOA, adjust the inter-cut output optical power automatically that can make the difference controlled in the range of customer set, extra simplify the system debugging.
- Excellent optical modulation degree controlled automatically, can in line with inter-cut channels automatically, keep the modulation degree consistent. For convenient adjustment, inside equipment adds one set manual operation modulate level control circuit (MGC).
- This model adopts high linearity DFB laser. ITU standard wavelength ±1.6nm adjustable. Excellent predistortion compensation, perfect APC,ATC, AWC control, 1+1 power backup, support hot plug. The advanced SNMP network management function, support remote management and control.
- ITU standard wavelength, ±1.6nm adjustable
- Build-in WDM, the panel with main signal optical input port and join-wave output port, offer simple connection
- The difference of main signal input optical power and inter-cut optical power can be set by panel and SNMP
- Identify and track the main signal optical power automatically, adjust the inter-cut output optical power automatically via VOD, to keep the difference in the range set by customer
- High performance optical modulation degree auto-control, can keep the modulation degree consistent, in line with inter-cut channels
- Independent manual operation modulate level control circuit (MGC), make the system convenient to debug
- High linearity 1550nm DFB laser
- High performance predistortion correction, excellent APC,ATC, AWC control
- Low (No) optical input, inter-cut optical shut automatically
- High performance SNMP network management function, support remote management and control
- 1+1 power backup, support hot plug
- Industrial excellent cost performance
CATV fiber optical transmitter general specifications
Performance Index Sipplement Min Typ. Max Optic
feature
( Main
signal )Main signal work wavelength (nm) 1548.40 1563.86 CR ( Red-Band ) 1528.77 1563.86
XX ( ITU wavelength code )
Pass loss (dB) 1.0 1.0 1.5 DW, CW, BW 1.5 2.0 2.5 MWInput optical power range (dBm) 0 +7Optical power ratio setting range (dB) 0 +8 The main, vice opitcal power ratioInter-out optical operating wavelength (dB) -5 +5 Laser OFF when main signal low than this value Optic
feature
( Inter-out
opitcal )Inter-cut optical operating wavelengthh (nm) 1528.77 1563.86 XX ( ITU wavelength code ) 1528.77 1543.3 CB ( Bule-Band )Wavelength adjustable range -1.6 +1.6 ± 200GHzwavelength adjustable mode
± 0.05nm steppingWavelength stability (Pm/ ℃ ) -1 0 Tc=20~70℃Line width (MHz) 5Side suppression ratio (dB) 45Equivalent noise intensity (dB/Hz) -160Output optical power (dBm) 6 10VOA insertion loss (dB) 1.0VOA adjustable range (dB) -20 0VOA adjustable accuracy (dB) -0.1 +0.1VOA polarization relative loss (dB) 0.3 RF
featureOperating bandwidth (MHz) 47 1000Input level (dBmV) 75 85Flatness (dB) -0.75 +0.75AGC syability (dB) -0.4 +0.4MGC adjustable range (dB) -7.0 +7.0MGC adjustable step (dB) 0.1Reflection loss (dB) 16Input impedance (Ω) 75RF connector F - Female Analog
link Test channel CH 8 PAL-DModulation degree (%) 3.812 CNR (dB) 54CTB (dB) 58CSO (dB) 58 Digital
linkTest channel (CH) 32 QAMModulation degree (%) 12MER (dB) 36 General
featureSNMP connector
RJ45General feature RS232Power supply (VAC) 90 265 50/60Hz (VDC) -48 70~72VDCPower consume (W) 20 Single power worksOperationg temp. (℃) -5 +65 Machine temp. control automaticallyStorage temp. (℃) -40 +85Operating relative humidity (%) 5 59Size (W)×(D)×(H) 483×386×44 (mm)
19×15.2×1.75 (")