Transcript
OT212C 2G6
DUAL OPTICAL FORWARD TRANSMITTER
Application Electrical to optical conversion of multi-channel CATV signals like AM-VSB, FM and QAM signals Downstream transmission in HFC networks
Features Dual optical forward transmitter with two individual RF inputs and two testpoints 1310nm and CWDM DFB laser with pre-distortion technology +4 dBm and +8 dBm (CWDM) optical output power High decoupling of RF inputs All-electronically adjustments of gain and OMI Automatic load control (ALC) for constant OMItotrms RS485 control interface SC/APC or E2000 connector as standard Very compact, module width 1 slot for 2G6
CSO
IN 1
OUT 1
RMS
TP 1
RMS
TP 2
CSO
IN2
OUT 2
BOT2900 OT212C
Available Types OT212-1310-04 OT212-1310-06 OT212-Cmm-08/Cmm-08
RS48 5
1310 nm version, +4 dBm optical output power 1310 nm version, +6 dBm optical output power
2G6 – Series
Specifications subject to change without notice - DBe_OT212C.doc
µP
OT212C
Block Diagram
CWDM version, +8 dBm Cmm, Cnn ITU channel number mm, nn
BKtel communications GmbH www.bktel.com e-Mail:
[email protected]
1
OT212C
2G6
Technical Data General Performance Data Frequency range
80 … 1218 MHz
Impedance
75
Input ports’ level (OMI= 5%)
75 dBµV minimum
Input attenuators’ range
0 … 10 dB
RF frequency response 111 … 606 MHz 47 … 862 MHz 5 … 1218 MHz
0.5 dB 0.75 dB 1.5 dB
Input ports’ RF return loss
≥ 18 dB (at 47 MHz) – 1.5 dB/oct, min. 15 dB
Isolation between transmitter parts (at min. RF input level) 111 … 606 MHz ..80 … 1218 MHz
≥ 60 dB ≥ 55 dB
Testpoint attenuation
20 dB
Output power tolerance
-1 … +2 dB
Optical wavelength tolerance 1310 nm version CWDM version
20 nm 6 nm
Optical return loss
≥ 35 dB
Power consumption Normal operation Both transmitters in standby mode
≤5W ≤ 2.5 W
Dimensions
Module width 1 slot for 2G6
Weight
~1.3 kg
Safety, EMC, Environmental Conditions Safety
EN 50 083-1 and EN 60 950 Laser Class 1M according IEC 60 825-1 (eyesafe for normal viewing)
EMC
EN 50 083-2
Equipment operation environmental conditions
Class 3.1 according ETS 300 019-1-3 (temperature controlled locations)
2G6 – Series
Transmission Performance Data Version ccc, channel allocation plan
C42
B36
Number of PAL / pilot / FM / 64QAM / 256QAM carriers
42 / 0 / 0 / 0 / 0
36 / 0 / 0 / 0 / 0
Optical modulation index OMI
3.9%
4.2%
Noise bandwidth
5 MHz
5 MHz
CNR 1) 2)
≥ 51.0 dB
≥ 51.6 dB
CSO 1) 2)
≥ 62 dBc
≥ 64 dBc
CTB ) )
≥ 63 dBc
≥ 64 dBc
1 2
Test Conditions
2
1
)
6km SMF optical fiber, optical receiver with Popt,in= 0 dBm, Ieq= 7.0 pA/Hz and = 0.80 A/W at 1310 nm used; backplane temperature 40°C
2
)
For performance measurement PAL and FM carriers are unmodulated, QAM carriers are modulated
BKtel communications GmbH www.bktel.com e-Mail:
[email protected]
