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 BaalFTTx
- Series |
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Fx-ES26XL
External modulated Optical CATV and
SAT-IF Transmitter 1550 nm |
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 print pdf version |
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Application
- Electrical to optical conversion of multi-channel CATV signals like AM-VSB, FM and QAM signals
- Electrical to optical conversion of SAT-IF video signals by separate input
- Downstream transmission in HFC and RF Overlay networks with excellent performance
- Externally modulated 1550 nm DFB laser transmitter
- Enables the usage of optical amplifiers (EDFAs) as boosters or repeaters in order to realize large scale HFC networks
Features
- 2 optical outputs with > 10 dBm optical output power each
- Low noise, narrow linewidth CW DFB laser with DWDM wavelength according to ITU grid
and adjustable wavelength
- Bandwidth of 47…870 MHz for CATV and 950…2605 MHz for SAT-IF input
- Separate RF input for SAT-IF signals
- Automatic load control (ALC) for CATV signal input, separate ALC for SAT-IF signal input
- Adjustable RF slope
- Front panel CATV- and separate SAT-IF test point
- Dual, hot-pluggable power supply modules for 100...240 VAC and ±48 VDC
- Web and SNMP Interface (a-version)
- LC display and LED status indication
- General purpose I/O interface for remote functions
- Very thin, only 1 U design for mounting into 19”, ETSI or JIS racks
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Block Diagram |
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| Technical
Data |
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| General |
Unit |
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Optical
Connector
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Any type of high return loss connectors
front or rear side mounted |
Optical
fiber
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standard single mode 9/125 µm |
RF-connector |
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F-female, front or rear side
mounted |
Control
interface
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a-version: Ethernet 10/100 interface:,
b-version: RS485/232 interface |
Power
supply types
(Dual redundant, hot pluggable)
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100...240 VAC, 50/60 Hz
+/- 36...+/- 72 VDC
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(Real) Power consumption |
[W] |
< 60 / 68 (1/2 power supply unit(s) equipped |
Enlosure |
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19” / 1 rack unit [U]
(optionally compatible to ETSI or JIS standards) |
Weight |
[kg] |
~ 9.0 (depend on power supply)
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Safety
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EN 60950, Laser class 1M according IEC 60 825-1 (eyesafe for normal viewing) |
EMC |
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EN50083-2 |
Climatic specification
Operation
Storage
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ETS 300 019, class 3.1
ETS 300 019, class 1.2
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Optical
Properties |
Unit |
Fx-ES26XL-85 |
FX-ES26XL-100 |
Wavelength
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[nm] |
1548 … 1560 nm or ITU-grid (CH23…
CH37) |
Side
mode suppression
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[dB] |
>30 |
Wavelength
adjustment range |
[GHz] |
-100, -50, 0, 50, 100
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Optical
power |
[dBm] |
2 x 8.5 min.
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2 x 10.0 min, |
Relative
intensity noise
(opt. return loss > 40 dB) |
[dBc/Hz] |
<-158
typ. <–160
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Maximum SBS suppression threshold
CATV & SAT-IF application,
25 km
CATV application, 65 km |
[dBm]
[dBm]
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+15 *)
+19
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Laser
linewidth (typ.)
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[MHz] |
0.3 |
*) SBS suppression threshold should be adjusted application individually as low as possible for best signal
performance, since using +14…+15 dBm threshold may result in 2 dB penatly of CNR for carrier
frequencies 80…110 MHz and 4 dB penalty for band I (47…68 MHz) carrier frequencies.
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Electrical PropertiesCATV
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Unit |
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RF frequency range |
[MHz] |
47 ... 862
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Frequency response flatness |
[dB] |
< +/- 0.75
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Nom. Input level per TV channel |
[dBµV] |
80 |
Input level range (per carrier) |
[dBµV] |
78...96 (for OMI = 5% per CATV carrier) |
True RMS input level range
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[dBm] |
-16...+2 (for ALC correctly working) |
Slope range |
[dB] |
-2 (cable equivalent) ... +8 (cable equalization) |
RF impedance |
[Ω] |
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Return loss |
[dB] |
> 20 (@ 47 MHz) - 1.5 dB/octave, minimum 15
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RF monitor (test point) level |
[dB] |
-20 ( -0.8...+0.2) |
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Electrical PropertiesSAT-IF
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Unit |
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RF frequency range |
[MHz] |
950...2605
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Frequency response flatness |
[dB] |
< +/- 2
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Input level range (per SAT-IF carrier) |
[dBµV] |
82...98 (for OMISAT = 1.0%)
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True RMS input level range
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[dBm] |
-11...+5 (for ALC correctly working)
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RF impedance |
[Ω] |
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Return loss |
[dB] |
>10
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RF monitor (test point) level |
[dBµV] |
66 +/- 2.5 (for OMI = 1.0%)
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Performance Characteristics CATV |
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| Transmitter version |
Unit |
C42 |
D84 |
N77 |
Channel
allocation plan for test |
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CENELEC 42 |
PAL-D
84 |
NTSC
77 |
number
of TV carriers
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42 |
84 |
77 |
Noise
bandwidth |
[MHz] |
5 |
5 |
4 |
CNR
Tx/Rx *)
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[dB] |
54.5 (52.5) |
51.5 (49.5) |
53 (51) |
CNR
Link 1*) |
[dB] |
53.5 (51.5) |
50.5 (48.5) |
52 (50) |
CSO
Tx/Rx and Link 1**)
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[dBc] |
64 |
CTB Tx/Rx and Link 1 |
[dBc] |
63
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*) Values are valid for pure CATV application, value in backets (…) are valid for CATV & SAT-IF
application with 36 QPSK modulated SAT-IF signals with carrier frequencies in the range of
1000 … 2600 MHz
**) Optical output #1
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Performance Characteristics SAT-IF |
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Unit |
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CNR *)
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[dB] |
> 27
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Intermoduation products
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[dBc] |
< -35 (including intermodulation due to CATV signal!)
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Spurious signals *) |
[dBc] |
< -38
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*) Measurement conditions as described in table “Test Condition” under row “Tx/Rx”; moreover
36 QPSK modulated SAT-IF signals with carrier frequencies in the range of 1000 … 2600 MHz and
27 MHz IF bandwidth are used.
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| Test
Conditions |
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Booster EDFA 2) |
1st Fiber Length 3) |
In-Line EDFA 2) |
2nd Fiber Length 3) |
Receiver
Popt,Tx 4) |
Tx/Rx 1) |
no |
no |
no |
no |
0
dBm |
Link
1 1) |
15 dBm |
25
km |
no |
no |
0
dBm |
Transmitter mode for all tests |
ALC of both, CATV and SAT-IF input switched ON! |
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1) RF input level at 80 dBμV per TV carrier
2) EDFA with noise figure N= 5 dB
3) Non-dispersion shifted fiber
4) Receiver Rx with equivalent input noise current density of IEQ= 7 pA/ÖHz and efficiency η = 0.95 A/W |
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Ordering information |
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For more information on this product please contact BKtel communications. Properties for ordering optical transmitter Fx-ES26XL
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Optical output power
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85
100 |
+8.5 dBm
+10.0 dBm |
Freyuency plan *)
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C42
N77
PAL84 |
Cenelec 42
NTSC 77
PAL 84
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NMS-Interface |
A
B |
HTTP/SNMP Ethernet
RS485
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Wavelength
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X
15xx.xx |
1548...1560
15xx.xx ITU wavelength
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Optical connector |
1
2
3
4
5 |
E2000
SC/APC
FC/APC-NTT
FC/APC_JDS
SC/APC with shutter |
RF input / optical output |
F
R |
on front side
on rear side
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Version |
0
OEM |
BKtel
OEM |
Power supply
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230/230
48/48
230
48
230/48
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2 x (100...240 VAC)
2 x (36...72 VDC)
1 x (100...240 VDC)
1x (36...72 VDC)
mixed 230 VAC / 48 VDC
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Power Plug |
0
Eu
US
Sw
UK
Jp
Ch |
No power cable included
Europe (Germany, Spain ...)
USA
Switzerland
UK, Ireland
Japan
China |
*) Other frequency plan on request! |
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| Available ITU grid wavelengths |
ITU Grid Ch. No. |
DWDM Wavelength |
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ITU Grid Ch. No. |
DWDM Wavelength |
23
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1558.98 nm |
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31 |
1552.52 nm |
24 |
1558.17 nm |
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32 |
1551.72 nm |
25
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1557.36 nm |
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33 |
1550.92 nm |
26 |
1556.55 nm |
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34 |
1550.12 nm |
27
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1555.75 nm |
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35 |
1549.32 nm |
28 |
1554.94 nm |
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36 |
1548.51 nm |
| 29 |
1554.13 nm |
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37 |
1547.72 nm |
30 |
1553.33 nm |
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| Other wavelengths on request! |
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BKtel communications GmbH
- www.bktel.com - E-Mail: info@bktel.com
Specifications subject to change
without notice |
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