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2G6
Platform
Optical Transmitter
OTyyyyZnn Ultrabroadband Optical Transmitter
Optical Amplifier
RF Amplifier
Return Channel Modules
Network Management Controller
BaalGiga
BaalMega
BaalNano
BaalFTTx
CABLEwatch
Fiber.xSAT
Zubehör
 
 
  2G6      
   
 
OTyyyyZnn
ULTRABROADBAND OPTICAL TRANSMITTER
   
       

Application

  • Electrical to optical conversion of
    multi-channel CATV signals like
    AM-VSB, FM and QAM signals
  • Downstream or upstream
    transmission in HFC networks

Features

  • Low noise DFB laser with pre-distortion technology, 1310nm, 1550nm, CWDM
    and DWDM variants with different
    optical output power
  • OTDWnn: ITU-Grid wavelength with adjustable wavelength: +/- 100 GHz
  • Output powers between +3 and +15 dBm
    (+3 and +6 dBm with un-cooled lasers)
  • OT1550, OTDWnn: SBS suppression and pre-chirping technology
  • Ultra broad bandwidth of up to 5 …1000 MHz
    (5 … 450 MHz for transmitters with
    un-cooled lasers)
  • Dual RF inputs: low and high level inputs
  • All-electronically adjustments: slope, gain, output power, OMI, pre-chirping etc
  • Automatic load control (ALC) for constant OMItotrms
  • RS485 remote supervision and control interface
  • SC/APC or E2000 connector as standard

 
 
     


 
 
 
   
 
Technical Data
1
1
1
1
OTyyyyZnn Mnemonic
Wavelength yyyy
1310 and 1550 (given in nm)
CWmm – CWDM laser (ITU grid channel number mm)
DWmm – DWDM laser (ITU grid channel number mm)
Type Z
S – standard uncooled laser for return path applications
L – linear cooled laser for forward path (narrowcast) applications
N – standard linear cooled laser for forward path (broadcast)
applications
X – extremely linear cooled laser for forward path (broadcast) applications
Optical output power nn
nn denotes output power in dBm
General Performance Data
S Type
L Type
N Type
X Type
Frequency range
5 ... 450 MHz
5 ... 1000 MHz
45 ... 862 MHz
5 ... 1000 MHz
Input level (OMI = 5%)
73 dBµV minimum
(87 dBµV minimum for coupled input)
Gain adjustment
0 … 24 dB
Slope adjustment
-3 (cable equivalent) … +16 dB (cable equalization)
Impedance
75 Ohm
RF return loss
> 20 dB (at 47 MHz) - 1.5 dB/oct, min. 15 dB
> 18 dB for 5 … 65 MHz
Testpoint TP1 attenuation
20 dB
Testpoint TP2 (AC voltage for RF signal and DC voltage for opt. output power indication)
80 dBµV+2ΔPopt ± 2.0 dB at OMI = 5% (AC)
0.1 V/mW ± 0.02 V/mW (DC)
Optical output power adjustment
0 … -3 dB
Output power tolerance
1310 nm:
1550 nm:

±1.0 dB
±1.0 dB


±0.5 dB

±0.7 dB

±0.5 dB
-0.5 … +1,5 dB
Optical wavelength fine tuning
-
-100…
+100 GHz
-
-
Optical return loss
> 35 dB
> 45 dB
> 40 dB
> 45 dB
Power consumption
(Power consumtion in standby mode)
≤ 8 W
(≤ 2 W)
≤ 12 W
(≤ 4 W)
≤ 12 W
(≤ 2 W)
≤ 12 W
(≤ 2 W)
Dimensions
Module width 1 slot for 2G6 chassis
Weight
1,3 kg
 
 
Transmission performance Data
1
1
1
X, N, L Type Transpitter Performance

Version ccc, chanal allocation plan


C42


B36


N77
Channel allocation plan (number of carriers)
Cenelec (42)
PAL B/G (36)
NTSC (77)
Optical modulation index OMI for X-/L-type
Optical modulation index OMI for N-type
4.1 %
3.4 %
4.4 %
3.7 %
3.0 %
2.5 %
Noise bandwidth
5 MHz
5 MHz
4 MHz
CNR X-Type (1310 nm) 1, 2)
CNR X-Type (1550 nm) 1)
≥ 51.5 dB
≥ 51.0 dB
≥ 52.2 dB
≥ 51.7 dB
≥ 51.2 dB
≥ 50.7 dB
CNR N-Type (1310 nm) 3)
≥ 51.5 dB
≥ 52.2 dB
≥ 51.2 dB
CNR L-Type (1550 nm) 1)
≥ 51.0 dB
≥ 51.7 dB
≥ 50.7 dB
CSO X-Type (1310 nm) 1, 2)
CSO X-Type (1550 nm) 1, 4)
≥ 65 dBc
≥ 50 dBc 5)
≥ 68.5 dBc
≥ 56 dBc
≥ 67 dBc
≥ 56 dBc 5)
CSO N-Type (1310 nm) 3)
≥ 62 dBc
≥ 65 dBc ≥ 65 dBc
CSO L-Type (1550 nm) 1, 4)
≥ 46 dBc 5)
-
-
CTB X-Type (1310 nm) 1, 2)
CTB X-Type (1550 nm) 1, 4)
≥ 66 dBc
≥ 62 dBc
≥ 70 dBc
≥ 64 dBc
≥ 68 dBc
≥ 63 dBc 5)
CTB N-Type (1310 nm) 3)
≥ 66 dBc
≥ 70 dBc
≥ 68 dBc
CTB L-Type (1550 nm) 1, 4) ≥ 58 dBc - -
CXM X-Type (1310 nm) 1, 2)
CXM X-Type (1550 nm) 1, 4)
≥ 63 dBc
≥ 55 dBc5)
≥ 63 dBc
≥ 57 dBc
≥ 63 dBc
≥ 57 dBc
CXM N-Type (1310 nm) 3)
≥ 62 dBc
≥ 62 dBc ≥ 62 dBc
S-Type Transmitter Performance      
Laser RIN

≤ -145 db/Hz (typical better -150 db/Hz)

IM2 S-Type 7)
IM3 S-Type 7)
≥ 46 dBc (two tone with OMI = 20 % per carrier)
≥ 54 dBc (two tone with OMI = 20 % per carrier)
 
 
Safety, EMC, Environmental Conditions  
Safety EN 50 083-1 and EN 60 950
Laser Class 1M acc. IEC 60 825-1
(eyesafe for normal viewing)
EMC EN 50 083-2
Equipment operation
environmental conditions
Class 3.1 acc. ETS 300019-1-3 (temperature controlled locations)
 

1) Transmitters with 8 to 15 dBm optical output power: 20 km non-dispersion shifted fiber, optical attenuator and optical receiver with Popt,in = 0 dBm, Ieq = 7.0 pA/√Hz and µ = 0.80 / 0.95 A/W (at 1310/1550 nm) used.
2) Transmitters with 3 to 5 dBm optical output power: 6 km non-dispersion shifted fiber, optical attenuator and optical receiver with Popt,in = 0 dBm, Ieq = 7.0 pA/√Hz and µ = 0.80 / 0.95 A/W (at 1310/1550 nm) used.
3) No fiber, but optical attenuator and optical receiver with Popt,in = 0 dBm, Ieq = 7.0 pA/√Hz and µ = 0.80 / 0.95 A/W (at 1310/1550 nm) used
4) Fiber length (chirp) compensation adjustment set to 10 km
5) When only frequencies up to 600 MHz are measured, CSO value is 6 dB better and CXM value is 2 dB better!
6) CXM measured arrording "C" method: CXM is the ratio between measurement carrier (lowest frequency carrier) and the side lobes arising when we other carriers (besides the meas. carrier) are 100 % modulated with 15.625 kHz modulation frequency
7) No fiber, optical receiver with Popt,in = 0 dBm, Ieq = 7.0 pA/√Hz and µ = 0.95 A/W (at 1550 nm) used

 
   
 
Available Types
S -Type
N -Type
L -Type
X -Type
OT1310S03 and S06
OT1550S03 and S06
OTCW11S03 … CW18S03,
OTCW11S06 … CW18S06
OT1310N03,
OT1310N04,
OT1310N05,
...
OT1310N15
OTDW21L08 and L11,
OTDW22L08 and L11,
...
OTDW58L08 and L11
OT1310X03, OT1310X05, OT1310X08, OT1310X11,
OT1310X13, OT1310X14,
OT1550X08,
OTDW21X08, OTDW23X08,
... OTDW37X08
 
   
BKtel communications GmbH - www.bktel.com - E-Mail: info@bktel.com
Specifications subject to change without notice
 
 
     
 
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