BKtel - Produkte - 2G6 - OTyyyyZnn

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Platform
Optical Transmitter
OTyyyyZnn	Ultrabroadband Optical Transmitter

Optical Amplifier
RF Amplifier
Return Channel Modules
Network Management Controller

2G6


OTyyyyZnn ULTRABROADBAND OPTICAL TRANSMITTER		print pdf version

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
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
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 P_opt,in = 0 dBm, I_eq = 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 P_opt,in = 0 dBm, I_eq = 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 P_opt,in = 0 dBm, I_eq = 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 P_opt,in = 0 dBm, I_eq = 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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