HDO371 Transmitter

The HDO371 is a DWDM DFB laser transmitter for return path fibre optic links in CATV networks. The transmitter is based on 1550 nm DFB laser technology and is available at different ITU wavelengths to support DWDM 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
  • 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
Cooled DFB with optical isolator
Peak wavelength
1530…1542 nm
Output power, nominal value
+8 dBm
Relative intensity noise
-155 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 / 120 mA
6.3 V / 350 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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