E-mail：monica_lei@pbbcom.com | Tel：+86 755 8614 9811
1550nm external modulated optical transmitter
The PTT5101
Description
The PTT5101 external modulated 1550nm transmitter is designed for HFC networks applications. It can optionally be equipped with an integrated EDFA for CATV applications such as super-trunk, hub Interconnects, video overlays In FTTx networks .
The unit is available in a standard 19”,1 rack unit chassis , with dual optical output, optional ITU-T wavelength for DWDM networks.
Features
■Selectable AGC (automatic gain control) or MGC (manual gain control)
■ Accepts low signal input levels (75dBμV/Channel @ 77 ch NTSC)
■ Unique simultaneously SBS/SPM suppressing
■ Front panel LCD display
■ Microprocessor control and monitor
■ RS-485 interface for remote monitoring and control
■ 45~870 MHz bandwidth
■ Patent RF pre-distortion circuit for excellent CNR and low distortion performance
■ Changeable cooling fan.
Application
■ Broadcast or narrowcast transmission at long or extended distances
■ Hub Interconnects Of Redundant Ring Architectures
■ Video Overlays In FTTx Networks.
|
Description |
Unit |
Value |
Conditions / Notes |
|
Optical Specifications |
|||
|
Laser Type |
|
Cooled DFB LD with isolator |
|
|
Optical Wavelength |
nm |
1555 ± 5 |
|
|
Connector Type |
|
SC/APC or FC/APC |
|
|
Laser RIN Noise Density |
dB/Hz |
≥-160 |
|
|
Optical Power |
dBm |
≤7 / 9 (Optional) |
|
|
Optical Output Port |
|
2 |
|
|
SBS Suppression Threshold |
dBm |
13、16、18 |
|
|
RF Specifications |
|||
|
Operating Bandwidth |
MHz |
45 to 870 |
|
|
RF Input Impedance |
Ω |
75 |
unbalanced |
|
RF Input Return Loss |
dB |
≤-16 |
|
|
RF Input Level |
dBµV/ch |
15 to 25 (80 dBµV/ch nominal value @ 77 NTSC channels loading) |
|
|
CNR |
dB |
52 (typical) |
Link budget is defined by output power to 0 dBm optical input at receiver under 65km fiber link + EDFA、SBS setting=16dBm test conditions. |
|
CSO |
dBc |
≤ -65 @ Port1 ≤ -63 @ Port2 |
|
|
CTB |
dBc |
≤ -65 dBc |
|
|
XM |
dB |
≤ -65 dB |
|
|
OMI |
|
3% ± 0.25 |
|
|
Flatness |
dB |
≤± 0.75 |
|
|
Connector Type |
|
F type female |
|
|
Test Point |
dB |
-10 ± 1 |
Relative to RF input power to laser @59CH PAL-D CW loading |
|
General Specifications |
|||
|
Control Interface |
|
RS-485 or Ethernet |
|
|
Power Supply |
|
90 to 260 VAC, 50/60 Hz, 100W（Max.） |
|
|
Operating Temperature |
℃ |
0 to +50 |
|
|
Storage Temperature |
℃ |
-20 to +60 |
|
|
Operating Humidity |
% |
85% Max |
|
|
Dimensions: (HxWxD) |
mm |
49 x 480 x 350 |
Canton:605mm*540mm*133mm |
