HDO302 Transmitter

The HDO302 is a DFB laser transmitter for return path fibre optic links in CATV networks. The transmitter is based on 1310 nm DFB laser technology and is available at different wavelengths to support WDM applications. Optical output connector can be factory installed at the rear or at the front panel. Other standard features include a field-replaceable fan unit and remote control of all adjustments.

Features at a glance:

  • Small form factor family, 2 RU height
  • Standardised input and test point levels
  • Adjustable input attenuator and equaliser
  • Integrated driver amplifiers
  • Pilot generator as OMI reference
  • Temperature compensated OMI
  • Two output power categories
  • Test signal and modem signal input connectors at front and rear
  • Fibre connectors can be located at the rear or at the front panel
  • Local and remote software control of all adjustments
  • Forced cooling through the unit

Product Specifications

Optical parameters
Light source
Uncooled DFB with optical isolator
Peak wavelength
1310 nm
1430 nm
1450 nm
1470 nm
1490 nm
1510 nm
1530 nm
1550 nm
1570 nm
1590 nm
1610 nm
Wavelength temperature coefficient
0.1 nm/°C
Output power, nominal value
+3 dBm or +5 dBm
Relative intensity noise
-145 dBc/Hz
Number of optical outputs
RF parameters
Frequency range
5…300 MHz
RF impedance
75 Ω
Input return loss
18 dB
±0.5 dB
Laser test point level for
10 % OMI 80 dBμV
Input level
80 dBμV
External inputs
20 dB
Level adjustment range
15 dB
Equaliser adjustment range
0…6 dB
Pilot frequency
4.5…6.5 MHz
Pilot level
4 % OMI
Noise and distortion performance
3rd order distortion
-60 dB
2nd order distortion
-55 dB
contact for information
Power consumption
5 W
Supply voltages
25 V / 130 mA
6.3 V / 300 mA
RF connectors
F female
Optical connector
SC/APC or E-2000/APC
2U x 7HP x 380 mm
1.5 kg
EMC compatibility
EN 50083-2
Operating temperature range
0…+45 °C
Storage temperature range
-20…+60 °C
Operating relative humidity
0…85 %
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