HDO761 Transmitter
The HDO761 downstream dual transmitter supports frequencies up to 1218 MHz and is available with an output power of 10 dBm. HDO761 is a 1550 nm DWDM transmitter for long distances. It supports broadcast and narrowcast and services in digital format.
Features at a glance:
- DOCSIS 3.1 compatible 1.2 GHz bandwidth
- ITU wavelengths in 100 GHz grid
- Electrical dispersion compensator provides a good CSO performance at longer transmission distances
- Standardised input and test point levels
- Low power consumption and high performance
- Four identical inputs with individual level and slope adjustments
- High isolation between inputs
- Unused 2nd inputs can be switched off for power saving and noise reduction
- Drive amplifier can be set to power save mode in narrowcast load conditions
- Integrated input amplifiers and laser driver amplifiers
- Automatic power control providing constant total OMI as a standard feature
- Optional integrated DWDM filtering to combine two different ITU wavelengths into one common output and enabling optical daisy chaining of multiple HDO761 transmitters
- Fibre connectors can be located at the rear or at the front panel
- Small form factor family, 2 RU height
- 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…1560 nm (ITU ch59…21)
Output power
+10 dBm
SBS suppression, max. launch power
Standard option A
High power option Y
Standard option A
High power option Y
+16 dBm
+18 dBm @ max. fibre length 20 km
Relative intensity noise
-154 dBc/Hz
OMI per channel
2.6 %
Link length setting
0…40 km
Pass band of optional xWDM filters
Pass channel
Reflect channel, DWDM
Pass channel
Reflect channel, DWDM
±0.12 nm
1520…1565 nm except the pass channels
Number of optical ports
2
RF parameters
RF inputs
Two identical inputs
Frequency range
47…1218 MHz
RF impedance
75 Ω
Input return loss
18 dB
Flatness
±0.4 dB
Automatic power control (APC)
Yes
Laser test point level for 4.5 % OMI
78 dBμV
Input level
77 dBμV
Level adjustment range
-15…0 dB
Equaliser adjustment range
-6…+1 dB
Isolation between inputs
50 dB
Noise and distortion performance
MER
40 dB
Noise and distortion performance MER 40 dB BER
<-10^9
General
Power consumption
13 W, (17) W
Supply voltages
25 V / 510 mA (670 mA)
6.3 V / 0 mA
6.3 V / 0 mA
RF connectors
F female
Optical connector
SC/APC, E-2000
Cooling
Field replaceable fan
Dimensions (h x w x d)
2U x 7HP x 380 mm, Occupies 1/12 of HDX002
Weight
1.5 kg
EMC compliance
EN 50083-2
Enclosure classification
IP20
Operating temperature range
0…+45 °C
Storage temperature range
-20…+60 °C
Operating relative humidity
0…85%
