Product DescriptionBrief IntroductionThe transmitting
modules of this machine adopt the imported DFB laser named Agere
(ORTEL, Lucent), Mitsubishi, Fujitsu, AOI, and so on. The internal
RF driving amplifier and controlling circuit of this machine can
ensure the best C/N.The perfect and stable circuit of optic power
output and controlling circuit of the thermoelectric refrigeration
device of the laser module assures the user of the best quality and
stable working for a long time. The internal microprocessor
software has many functions such as laser monitoring, number
display, trouble alarm, and on-line management.Once the working
parameter of the laser is out of the fixed range, there will be a
red light glistening to alarm. The RS-232 standard connector makes
it is possible to manage online and monitor in another place. The
machine adopts a 19" standard shelf and it can work with the
voltage from 110V to 254V.Features•High performance: Externally
modulated technology, no laser chirp, low dispersion distortion,
high extinction ratio, with excellent characteristic within
40~862MHz.•Narrow bandwidth (0.65MHz), lower noise, DFB
continuous-wave laser, is propitious to reduce the influence of the
dispersion. •The operating bandwidth is up to 47~862MHz
(47~1080MHz).•CNR ≥ 53dB and excellent CTB, CSO index.•SBS:
13~18dBm adjustable.•ITU standard wavelength, ±200GHz (±1.6nm)
adjustable.•AGC/MGC mode is optional at the spot. OMI can be
optimized at the spot.•Perfect RS232 communication
interface.•Advanced SNMP network management function.•1+1 power
supply backup, switch automatically.•Casing temperature
auto-control.•Excellent P/P ratio.Applications•Used in main links
and distribution network links in large and middle CATV station
head-end. Analog-digital hybrid transmission >200Km (with
dispersion compensation). Pure digital transmission (without
dispersion compensation) >400Km, (with dispersion compensation)
>700Km.•ST1550EU ITU wavelength adjustable, applicable to the
value-added service of DWDM fiber optic CATV system and CFG
dispersion compensation system.•It can be used in branch FTTH that
has high system index demand. Point to Point>65Km, CSO ≤ -65dB.
It can provide highly qualified and reliable value-added service
such as RFTV, IPTV, and VOD for the secondary users. It can also
avoid the limitation of CSO deterioration and transmission distance
caused by laser chirp for adopting a 1550nm direct modulated
optical transmitter Detailed Photos Product Parameters
Performance Index Supplement
Optic Feature Operating wavelength (nm) 1548~1563
ST1550EC ITU-TG.692 ST1550EU Wavelength ADJ. range (nm)
±1.6(±200GHz) ST1550EC Wavelength ADJ. mode ±0.05nm stepping
ST1550EU Wavelength stability (Pm/ºC) -1~0 Tc=20~70ºC Linewidth
(MHz) Typ.=0.65 FWHM(△λ), (-3dB fullwidth) Side mode suppression
ratio (dB) ≥45 SMSR Equivalent noise intensity ≤-160
RIN(20~1000MHz) Number of output port 2 Optional4,6 Output
power (dBm) 10, 8.5, 7.0, 4.5 2×7, 2×9, 2×10, 2×5, 4×7,6×7 Return
loss (dB) ≥50 Optical connector FC/APC Optional
SC/APC, LC/APC RF Feature Work bandwidth (MHz)
47~862 Input level (dBmV) 18~28 AGC Flatness (dB) ≤±0.75
47~862MHz Return loss (dB) >16 Input impedance (Ω) 75
RF port F-Female
Link Feature Transmit channel PAL-D/60CH PAL-D/99CH
CNR1 (dB) ≥53.0 ≥51.5 Back to Back CNR2 (dB) ≥51.5 ≥49.5 65Km
optical fiber, 0dBm receive CTB (dB) ≥-65 ≥-65 CSO (dB) ≥-65
≥-65 SBS restrain (dBm) 13~18 Adjustable
General Feature SNMP network
management interface RJ45 Communication interface
RS232 Power supply (VAC) 90~265 50/60Hz (VDC) -48
30~72VDC Power consume (W) 50 Single power works Work temp. (ºC)
-5~65 Machine temp. control automatically Storage temp. (ºC) -40~85
Operating relative humidity (%) 5~95 size (")
19×14.5×1.75 S-Type 19×17.9×1.75 L-Type Packaging &
Shipping Company ProfileFAQ1. What are the payment terms that
you support? Usually, we accept T/T, PayPal, Western Union,
and Alibaba Trade Assurance. You can select the terms of payment
which is more convenient for you.2. What about the lead
time?Usually, if there's stock, we ship the goods within 3~5
working days after the deposit is confirmed. If it is out of stock,
the lead time depends.3. How about the shipping?When the package is
small, we normally choose FedEx, DHL, TNT, and UPS and so on, while
the goods have high weight and volume, we suggest using air or sea
shipment.4. How can I place an order?(1) Negotiation is agreed upon
for the product price and specifications.(2) The Proforma invoice
will be sent for confirmation.(3) After the agreement on the
proforma invoice, the customer makes the deposit.(4) Manufacturing
will be started as soon as the payment is confirmed by our bank.(5)
Ship out the goods within the agreed delivery deadli
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