1550 nm Return Transmitter - Standard


About the Product

The RT5S, 1550 nm Return Transmitter - Standard series, is a highdensity module with two lasers. It is designed to plug into PBN’s latest Advanced Intelligent Multi-services Access platform - the AIMA3000.

PBN’s RT5S is currently available in either a dual transmitter configuration. It features a full-spectrum advanced return path transmitter designed for multi-services operators (MSOs) to increase network capacity to satisfy an ever-growing subscriber demand for bandwidth. The module’s operating wavelength conforms to ITU standards and it can work with PBN’s Erbium Doped Fiber Amplifier Module (EDFA). It provides the utmost flexibility for MSOs during the transition to all-digital.

The RT5S employs an advanced RF circuit design and two high quality independent low-chirp lasers. In addition, it has a cutting-edge optoelectronic design for the delivery of high-quality transmissions, over passive fiber optic networks.

All RT5S models can also be conveniently monitored and controlled through a computer connected to one of the Ethernet ports via the ASMM module. All module settings are retained in non-volatile memory to ensure trouble-free operation. Bulk updating, automatic uploading and downloading of configuration files can be done when using PBN’s NMSE web-based management system..

  • Plug-and-play with the AIMA3000 platform 
  • High-quality 1550 nm isolated low-chirp analog DFB lasers
  • RF amplifier gain blocks with advanced GaAs technology for better performance 
  • Conforms to ITU DWDM standards
  • Frequency response of 5 MHz to 204 MHz 
  • Local laser shutdown via web interface 
  • Totally independent and controllable circuits in one module slot 
  • Alarm monitoring via ASMM web interface and PBN NMSE
  • Automatic thermo-cooler control (ATC) for a consistent laser temperature
  • Automatic power control (APC) for maintaining a consistent amount of power amplification for each wavelength
  • Remote firmware upgrade and auto upload/download of configuration files through ASMM web interface or using PBN's NMSE
  • Bulk firmware updates through PBN's NMSE
  • Fully FCC, CE, and RCM compliant
Optical Performance
Optical wavelength   ITU standard wavelength 
Optical outputs 2
Output power 10 dBm
Optical connector SC/APC (1) ,FC/APC, LC/APC, E2000/APC
Laser RIN <-155 dB/Hz
RF Performance
RF bandwidth 5 MHz to 204 MHz
RF flatness ± 0.5 dB
RF input return loss > 16 dB
RF input level (2)  15~25 dBmV per channel
RF impedance 75 Ω
Laser input RF level test point -20 dB ± 1 dB
Isolation between transmitters > 60 dB
RF connectors 2 x GSK-type female
RF test points

4 x Mini-SMB (3)

Alarms and laser status  Front-panel LEDs, SNMP Traps
Link Performance (4)
CNR  > 51 dB
IMD2 > 54.5 dB
Power supply Powered via AIMA3000 backplane
Power consumption < 15.0 W
Operating temperature  -5 ℃ to +55℃
Storage temperature -25 ℃ to +70 ℃
Dimensions (WxDxH) 24.6 x 410 x 152.5 mm
Weight 0.88 kg
Supported network management options PBN's NMSE or through ASMM's Web Interface



(1) Standard option. Contact a PBN Sales Representative for availability of other options. 
(2) dBuV= 60 + dBmV 
(3) Four mini-SMB connectors on front panel: 2 RF inputs test ports and 2 to measure RF input before the laser. 
(4) Measured in a typical system with 4 channels signal source (11.5 MHz, 26.5 MHz, 45.5 MHz and 58.5 MHz), -2 dBm, 6 % OMI, 10 km fiber. IMD2 is measured at 15 MHz and 38 MHz.



1550 nm Return Transmitter - Standard


V Optical ports



W Optical Output Power


10 dBm (10 mW) optical power

X1X2 (1)(2) First Channel   Last Channel











192.1 THz (1560.61 nm)

192.3 THz (1558.98 nm)

192.5 THz (1557.36 nm)

192.7 THz (1555.75 nm)

192.9 THz (1554.13 nm)

193.1 THz (1552.52 nm)

193.3 THz (1550.92 nm)

193.5 THz (1549.32 nm)


195.1 THz (1536.61 nm)

Y Optical Connector Type





SC/APC (3)




Z Bandwidth


5 ~ 200 MHz



(1) Default spacing is 200 GHz. For other wavelength configurations not listed, please contact PBN.

(2) X1 is first channel and X2 is second channel


Dual X1X2 2527, 2525

(3) Contact PBN Representatives for detailed optical channel information.

  • RT5S