ES10 – La ES10 – Xla SSO 689A Optical Transmitter 1550 nm Operating Manual
Safety instructions Attention: Please read the instructions completely and carefully before putting into operation! All operation steps should be carried out in the prescribed sequence! Improper putting into operation can cause serious danger for persons or damage the devices.
Warranty All products manufactured by BKtel communications GmbH are guaranteed to be free from defect in material and workmanship for a period of one (1) year from the date of shipment.
TABLE OF CONTENTS 1 DOCUMENT STATUS 2 PARTS LIST 3 GENERAL DESCRIPTION 5 6 7 3.1 3.2 Introduction Principle of Operation 7 8 4 TECHNICAL SPECIFICATIONS 11 4.1 4.2 4.2.1 4.2.2 4.2.3 4.2.4 4.3 4.4 4.5 4.5.1 4.5.2 4.5.3 4.
1 DOCUMENT STATUS Document Operating Manual ES10-La / XLa Revision 00 01 02 03 04 Date 23.05.02 18.07.02 23.08.02 27.08.02 27.09.02 Responsible Seidenberg Seidenberg Hensel Seidenberg Seidenberg Remarks Document created 84 channel PAL-D specs Operation Operation Instructions 05 04.10.
2 PARTS LIST This Document contains the description for the following units transmitter unit power supply + fan module optical interface modular external modulated 1550 nm optical transmitter basic unit power supply + fan module 100 VAC ... 240 VAC power supply + fan module 36 VDC ...
3 3.1 GENERAL DESCRIPTION Introduction The optical transmitter BK-ES10 represents a family of externally modulated 1550 nm DFB laser transmitters. These products have been developed to fulfil the requirements of modern Hybrid Fiber Coax networks for the transmission of CATV, cable phone and cable data signals. There are currently 2 different base versions available: • ES10-La for applications with moderate fiber length of about < 50 km This version features a SBS threshold of 16.
The optical interface can be ordered with different optical connectors as specified in the parts list (pls. ref. to 2). It is also possible without the need of using special tools to change the optical interface by replacing the optical connector interface plate by another one as specified in the parts list. For an EMS (element management system) or a NMS (network management system) an Ethernet 10/100 MBps interface is available at the rear side of the ES10-XLa.
and/or >130% of the initial laserdiode drive current a B-grade alarm which indicates a warning is generated. At 100% cooler drive current the laserdiode drive current is switched off to protect the laserdiode against irregular temperature conditions and an A-grade alarm indicating a severe malfunction is generated. Both types of alarms are causing the corresponding LED on the front plate of the optical transmitter to emit.
RS 232Interface Ethernet Interface Liquid crystal display + push buttons RS485 Interface Input Monitor RF - Input RF - Monitor Figure 2.
4 TECHNICAL SPECIFICATIONS ES10XLa – xxx ES10La - xxx Optical Transmitter 1550 nm Application Electrical to optical conversion of multichannel CATV signals like AM-VSB, FM and QAM signals Enables the usage of optical amplifiers (EDFAs) as boosters or repeaters in order to realize large scale HFC networks Excellent performance in order to realize links exceeding 100 km (XLVersion) E th e rn e t or R S 485 LC D u P o p t. o u tp u t # 1 o p t.
ES10-XLa Optical Properties Wavelength ITU-grid (CH23… CH33) Wavelength adjustment range [GHz] +/- 100 in steps of 50 Optical power, ES10-XLa-85 [dBm] 2 x 8.5 min. Optical power, ES10-XLa-100 [dBm] 2 x 10.0 min. SBS-Suppression [dBm] Threshold adjustable between +13 and 16.5 (optional 19) dBm Laser linewidth (typ.) [MHz] 0.3 [MHz] 47 –1000 Electrical Properties RF-Frequency Range Flatness [dB] <±0.75 (47...860 MHz) Version xxx <±1.5 (860 MHz...
ES10-La Optical Properties Wavelength 1550.....1560 Optical power, ES10-La-70 [dBm] 2 x 7.0 min. Optical power, ES10-La-85 [dBm] 2 x 8.5 min. SBS-Suppression [dBm] Fixed threshold +16.5 dBm Laser linewidth (typ.) [MHz] 0.65 Electrical Properties RF-Frequency Range Flatness [MHz] 47 –862 [dB] <±0.
General Wavelength Side mode suppression Relative intensity noise (opt. return loss < -40 dB) Opt. Connector Optical fiber Nom. Input level per TV channel dynamic range of AGC RF-connector/ impedance return loss Climatic Specification Operation Storage EMI Power Supply Dual redundant, hot pluggable (3 Versions are available) Power Consumption Enclosure Weight Funea Broadband Services bv version: 11-02 [nm] [dB] [dBc/Hz] [dBµV] [dB] [dB] [W] [kg] 1550 … 1560 >30 <-158 typ.
4.1 Displays and Alarms Modul LED Standard Operation LED green non urgent alarm (warning) LED yellow LED red urgent alarm OUT LED 4.2.1 loss of output power LED green0 LED yellow LED red standby – operation LED dark nominal input power input power out of nominal operation loss of input power IN LED 4.
connected to the RS485 port. Information about the protocol can be obtain from the document RS485 specifications.pdf. 4.2.4 BK device bus interface: RS485 (ES10-L only) The RS485 interface can be used to manage the ES10L, that means to read data and to change some settings. BKtel offers a WINDOWS based software tool to communicate with the transmitter. Additionally, a RS485 to RS232 level converter can be offered.
4.3 Front Panel Figure 4.1 shows an example of the front panel view of the ES10. The RF-input and the optical connectors are optionally available on the rear panel. The handles can be omitted on request. Item # 1 2 3 4 5 6, 7 4.
Figure 5.3.1: 100 ... 240 VAC power supply and fan modules 4.5.2 48 VDC module C€ + - DC-Line Input 36-78V DC 75W max, Fuse T2.0A SV19" 1HE-48V 1910-0101 Ä01 007314 Figure 5.3.2 gives the view on the 48 VDC power supply and fan module. There is a 48 VDC cable terminal in order to connect the supply voltage. It is important to take care of the right polarity of the DC supply voltage. A fuse and a spare fuse are implemented inside the power supply and fan module and maybe replaced if required.
4.5.3 24 VDC module Figure 5.3.3 gives the view on the 24 VDC power supply and fan module. There is a 24 VDC cable terminal in order to connect the supply voltage. It is important to take care of the right polarity of the DC supply voltage. A fuse and a spare fuse are implemented inside the power supply and fan module and maybe replaced if required. There is one LED informing about the status of the power supply module. The power unit O.K.
5 OPERATING THE ES10 5.1 • • • • • Power-Up Sequence Be sure that the BK-ES10 is going to be put into operation under the specified environmental conditions. Avoid temperature shocks after transportation of the BKES10 and allow sufficient time to accommodate with the environmental conditions at the operating site. If not already realised install the appropriate power supply + fan modules, respectively fan-only modules.
Model yy C42 B52 D59 D84 N77 # AM TV channels (0 dBr) 42 52 59 84 77 # FM channels (at –4 dBr) 0 36 0 0 0 # QAM64 channels (-10 dBr) 0 46 0 0 0 TV channel level [dBµV] 80 80 80 80 80 Total rms OMI [%] 19.2 18.4 19.4 19.4 19.2 total level [dBm] -12.5 -10.8 -11.0 -9.5 -9.9 The ES10 has a built in RF power meter function, which monitors the total level at the input of the transmitter as given in the right most column of the table beyond.
Total rms input power for n unmodulated channels with 80 dBµV total rms power in dBm -10,00 -15,00 -20,00 -25,00 Example 1: The ES10Xla-PD84 is specified for 84 TV channels. The nominal input level voltage per carrier is 80 dBµV which corresponds to an input level power of -28.7 dBm for one unmodulated channel only. For 84 unmodulated channels the total input level will be –9.5 dBm. -30,00 The specified, guaranteed AGC range of the ES10 is +3 / -6 dB. The recommended 0 30 77 ...
The BER also depends on the mix of AM, FM and QAM channels. If the QAM load is very small compared to the AM and FM load the OMItotrms might be chosen about 1 dB higher while still obtaining the BER as given in the diagram below. 1.00E+00 1.00E-02 1.00E-04 1.00E-06 1.00E-08 1.00E-10 15.0 17.5 20.0 22.5 25.0 OMItotrms in % direct modulated externally modulated The ES10 is typically factory adjusted to achieve a BER of 10-9 with most frequency plans using the built in AGC function.
5.4 Optical power on /off The transmitter can be configured as a back-up transmitter with optical output power off. This allows to turn on the transmitter within less than 10 seconds in situations where a fast switching to a redundant transmitter is requested. The optical power on/off switching can be performed via the buttons on the front panel or via the Ethernet interface. 5.5 SBS suppression setting (ES10-XLa only) The ES10 enables to change the SBS suppression of the transmitter.
In case of a fan or power supply failure the power supply/fan unit has to be replaced by the customer. BKtel offers fans as regular spare parts. Urgent alarms: MODUL LED red • Laser cooler current =100 %. In this case the temperature of the transmitter is too high. Improve thermal heat flow in order to decrease the operating temperature.
Root-Screen NMS Server (ES10-Xla only) This menu contains all NMS Server specifics Device No.1 (Device's aliasname is shown) This menu contains all items that are specific to the device with the shown aliasname … (if further devices are communicating with the NMS server) Device No.
Parameters Output power RF Input power, total rms RF Input power, nominal RF Gain(only AGC mode) OMI total rms(only Manual mode) Laser Current Shows the optical Output power Shows the el. total rms input power If the el. input power is out of range for the selected OMI- or Gain-settings, a input warning will be generated and the showed value is not valid. Shows the nominal el. total rms input power for specified operation Shows in AGC mode the actual Gain of preamplifier related to nominal. If the el.
• 7 Caution: Do not extend the connector by more than 1 cm from the body of the ES10. TROUBLESHOOTING To avoid problems with the BK-ES10 and 1550 nm transmission there are some general rules which are important to follow. • Use carefully cleaned angled connectors like SC/APC, FC/APC, E2000 and similar ones only for the whole transmission system between optical transmitter and receiver.
