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| V23814-S1306-M931 Test Board PAROLITM Transmitter AC/DC V23815-S1306-M931 Test Board PAROLITM Receiver AC/DC OVERVIEW Siemens PAROLI Tx and Rx modules provide a 12-channel parallel optical link for high-speed data transmission applications. Two types of PAROLI modules are available - AC and DC versions. The AC version provides a 12-channel asynchronous optical link for 12 electrical data inputs, each with a maximum data rate of 1.25 Gb/s per channel. No data encoding is done in this version. The DC version provides a 12-channel synchronous optical link, but data is transmitted over 11 optical fibers using 22 electrical data inputs. One optical fiber channel is used for clock transmission. Tx module provides 2:1 electrical multiplexing and encode data using 4B/5B encoding. The electrical input data rate per channel can range from 155 to 500 Mb/s with 155-500 MHz clock in STROBE mode and 75-250 MHz clock in SCI mode. This data sheet provides the general guidelines to set up and characterize PAROLI Tx and Rx modules. Although the measurements described here are done in manual mode, electrical interface connectors are provided on the PAROLI test boards for automated measurements. User can develop appropriate test program to automate testing as required. PAROLITM is a trademark of Siemens AG Semiconductor Group NOVEMBER 1998 TRANSMITTER TEST BOARD Figure 1 Test Board PAROLI transmitter AC/DC Figure 2 Switch, jumpers and LEDs on the Tx test board Electrical connectors Layout of the Tx test board is shown in Figure 19. There are 3 multipin connectors provided on the Tx test board. These connectors are used if the test setup is to be automated and controlled via a computer. For manual testing, described in this data sheet, these connectors are not used. Connector 1 D-sub, 37-pin connector is used to provide VCC power supply connections. For manual mode, banana plug sockets are provided for VCC connections. 50-pin connector is used to set the status of slide switch settings Two red LEDs, as shown in Figure 2, provide LASER ON (LCU) status, and for DC modules, the PLL (MOD-UP) status. MODUP LED ON indicates PLL is locked. When LCU LED is ON, the laser controller is ON, and laser is active and emitting. If MODUP LED is OFF it indicates PLL is unlocked, and there may be , PLL problem. MOD-UP and LCU status can be read remotely via computer through the 14-pin connector (ID #10). Table 1 Transmitter board switch and LED functions Switch CLK-SEL (H, L) H L Reset (H, L) H L LED Mod-Up on off LCU on off Jumper (M, A) M A Notes 1. Not used in AC Tx test Strobe mode(1) SCI mode(1) Normal operation Resets module Module up, laser active, PLL locked(1) PLL unlocked(1) Laser control on, laser active Laser control off, laser not operating Manual mode Auto mode Connector 2 Connector 10 14-pin connector is used to read the Module/Laser active status Two BNC connectors (ID #3) provided on the test board are used to measure the time delay between RESET until PLL locks. These BNC connectors have no function in AC module test. Electrical switches and jumpers On the Tx test board, there are 2 slide switches and 2 electrical jumpers as shown in Figure 2. The CLK-SEL switch is used for DC modules to select between STROBE (H) and SCI (L) mode. The RESET switch is use to reset Tx module. The jumpers provide the option of AUTO (A) or MANUAL (M) mode. In AUTO mode, the switch settings are set remotely through a computer via connector (ID#2). The green LEDs (ID#8) located near this connector turn on if AUTO mode is selected. Figure 3 Test board PAROLI receiver AC/DC Semiconductor Group 2 V23814/15-S1306-M931, PAROLITM Test Board Tx/Rx AC/DC RECEIVER TEST BOARD Electrical connectors Table 2 Receiver board switch and LED functions Switch EnSD (H, L) H L OEN (H, L) H L H L H L LED SD11 LED on, signal detect on data channel 11 (fiber #12) LOCK_DET PLL locked on frame signal(2) FRAME_DET LED on, signal present on fiber #1(3) Jumper (M, A) M A Notes 1. Output enable switch. Layout of the Rx test board is shown in Figure 18. There are 4 multipin connectors provided on the Rx test board. All of these connectors are used if the test setup is to be automated and controlled via a computer. For manual testing, described in this data sheet, these connectors are not used. Connector 1 D-sub, 37-pin connector is used to provide VCC power supply connections. For manual mode, banana plug sockets are provided for VCC connections. 50-pin connector is used to set the status of slide switch settings 14-pin connector is used to read the signal and lock detect status 50-pin connector to measure LVDS bias voltages Enables signal/frame detect and SD11 Disables signal detect and SD11 Enables LVDS outputs Sets LVDS data outputs to static LOW(1) Strobe mode(2) SCI mode(2) Receiver active(2) Resets module, LVDS outputs set LOW(2) CLK_SEL (H, L) Connector 2 Connector 10 Connector 16 RESET (H, L) Two BNC connectors (ID #3) provided on the test board are used to measure the time delay between RESET until PLL is detected. These BNC connectors have no function in AC module test. Figure 4 Switch, jumpers and LEDs on the Rx test board Manual mode Auto mode Electrical switches and jumpers 2. Not used in AC Rx test. 3. In DC, frame signal on fiber #1. On the Rx test board, there are 4 slide switches and 4 electrical jumpers as shown in Figure 4. These slide switches provide STROBE/SCI, OEN, CLOCK-SELECT and RESET functions. The jumpers provide the option of AUTO (A) or MANUAL (M) mode. In AUTO mode, the switch settings are set remotely through a computer via connector #2. The green LEDs located near this connector turn on if AUTO mode is selected. In AC module test, CLOCK-SELECT (Strobe/SCI) and RESET switch are not used and have no functionality. Three red LEDs on the Rx test board provide status of SIGNAL DETECT, PLL LOCK DETECT and FRAME DETECT function. In AC module test, the center LED labeled LOCK-DET is not used and has no functionality. The other two LEDs indicate SIGNAL DETECT in fiber #1 and in fiber #12. TEST BOARD CONFIGURATION PAROLI Tx and Rx test boards must be configured correctly before the test is performed. PAROLI Tx test board and Rx test board are designed so that they can be used for both AC and DC versions with minor configuration changes on the test boards. Currently the following restrictions apply with respect to the compatibility of transmitter boards with AC and DC Tx modules. Transmitter Test Board, Current DC Tx Traces identical to those shown in Figure 5 are for the current version of the DC Transmitter modules. Figure 5 Transmitter test board, current DC Tx Semiconductor Group 3 V23814/15-S1306-M931, PAROLITM Test Board Tx/Rx AC/DC Transmitter Test Board, revised AC and DC Tx Traces identical to those shown in Figure 6 are for the revised version of the AC Tx and DC Tx modules. Figure 6 Transmitter test board, revised AC and DC Tx Figure 7 DIP-Switch S4 settings shown for 3V banana plug option Note changes For AC PAROLI Tx and Rx tests, Table 3 lists the 12 applicable differential input and output ports on Tx and Rx test boards. Input and output cables must be connected to the applicable connectors only. Table 3 Applicable channels in AC testing AC Channel 1N 1P 2N 2P 3N 3P 4N 4P 5N 5P 6N 6P Channel # on Board 1N 1P 2N 2P 3N 3P 4N 4P 15N 15P 16N 16P AC Channel 7N 7P 8N 8P 9N 9P 10N 10P 11N 11P 12N 12P Channel # on Board 17N 17P 18N 18P 19N 19P 20N 20P 21N 21P 22N 22P LASER SAFETY The PAROLI Tx module is an IEC 825-1 Laser Class 3A product, and emits invisible laser radiation. To prevent eye injury, DO NOT STARE into the beam or view directly with optical instruments. Handling PAROLI modules are supplied with a 72-pin lead frame designed for hot bar soldering. Appropriate care should be taken during handling and installation of the modules on the test boards. Bending of the leads may result in lack of contact on the test board, which may cause the module to malfunction. PAROLI modules are sensitive to ESD damage. Appropriate precautions should be undertaken during handling and installation. Cooling Cooling is not necessary for AC PAROLI modules. The DC Tx and Rx modules must be cooled appropriately to avoid damage by overheating. Cooling can be provided by installing a small device cooling fan a short distance away from the PAROLI module, or by connecting an air supply at the air inlet provided on the test board. RECOMMENDED TEST EQUIPMENT A variety of test equipment can be used to perform optical and electrical measurements on PAROLI optical modules. As general guidance, we recommend the use of the following test equipment. Table 5 provides only a selection of test equipment needed to characterize modules. POWER SUPPLY REQUIREMENTS The Testing of PAROLI Tx and Rx test boards requires the following power supplies. All power supply connections must be made, and voltages adjusted, prior to the installation of the PAROLI module on the test board. Table 4 Power supply requirement Power supply +3.3 V / 1.5 A Applications VCC to operate the module, separate supplies for Tx and Rx recommended To power display LEDs and buffer pre-amplifier To power buffer pre-amplifier and check PLL locking +2.4 V / 100 mA To supply LVDS High and Low to Tx +5 V / 200 mA -5 V / 200 mA Power supply connections to the test boards can be made either through banana plugs at sockets provided underside the test board, or via D-sub connectors for automated test setups. The blue DIP-switch on the upper left corner is used to select the D-sub or banana plug option. Two sockets on the test boards are provided for VEE ground connections. Semiconductor Group 4 V23814/15-S1306-M931, PAROLITM Test Board Tx/Rx AC/DC Table 5 Recommended test equipment Description Digital Communications Analyzer Pattern Generator Module Error Detector Module Clock Source 2.5 GHz Optical Plug-in Module Optical Power Meter Power Supply Model HP 83840A HP 70841B HP 70842B HP 70311A HP 83487A HP 8153A HP 6624A Application For signal waveforms analysis To generate electrical signal patterns For BER measurements For providing clock signal For optical measurements For optical measurements Provides 4 power supply outputs 5 6 Switch off all power supplies to install PAROLI Tx module. Install PAROLI Tx module. To install Tx module, drop the module in the alignment holes. The module will fit snugly and cannot be moved laterally. Now apply the mechanical clamp to hold Tx module in place (Figure 8). Cooling is not necessary for AC Tx module. Figure 8 Module installation on the Tx test board Besides the test equipment listed in Table 5, other accessories such as electrical jumper cables with SMA type connectors, optical fiber cable with appropriate connectors, and certain plug-in modules may also be required. Siemens supplies the following optical cable assemblies for PAROLI links that are useful in testing PAROLI modules. SMC-SMC Jumper Cable, 10 meter jacketed Siemens Part # V23867-B6474-A10 SMC-SC Fan-Out Cable, 2 meter, w/o jacket Siemens Part # V23867-B6388-A2 The SMC to SC fan-out cable is especially useful for making certain optical measurements on individual channels and also for the testing and diagnostics of either Tx or Rx module. TEST PROCEDURE FOR AC PAROLI MODULES This section describes the step-by-step procedure to set up PAROLI test boards for performing tests on Tx and Rx modules. Testing of AC transmitter module This section describes the step-by-step procedure to power up and test AC Tx module. Check the Tx test board configuration. Generally, test boards are factory set for AC or DC testing. However, changes can be made, if necessary, using instructions in the TEST BOARD CONFIGURATION section of this data sheet. Test procedure 1 Make all required power supply connections, 3.3 V for VCC, 2.4 V for LVDS, +5 V for LEDs and OpAmp. -5 V is used only for DC module. Set blue DIP-switch Figure 7 to 3 V setting and use banana plugs for power supply connections. Apply 2.4 V so that static LOW is applied to LVDS inputs. This is important as static HIGH will turn the laser OFF due to built-in alert circuit for laser safety and you will not see a signal. To apply static LOW, connect +ve terminal to L, and -ve to H, and finally connect H to VEE. The voltage is applied via a high impedance to the Tx input. If a data pattern is applied, it overrides the staic level due to its low impedance 50 path. Set RESET jumper to MANUAL mode. CLK-SEL switch has no functionality in AC Tx test. Turn on all supply voltages and verify voltage levels using a digital voltmeter. 7 Laser enable function is supported only in AUTO mode. To use the test board in MANUAL mode, laser controller must be enabled. Use a jumper to short pin #5 and #6 (3rd row from the left) of the PCI connector #2, as shown in Figure 9 Laser enable green LED will turn ON when power is applied to the test board. Figure 9 Laser controller enable by shorting pin #5 and #6 Pin #5 and #6 Laser enable LEDs LE and -LE 8 Switch on the power supplies and activate Tx reset by toggling RESET switch to LOW and then to HIGH. This will reset the Tx module. LCU LED will be ON. Laser array will be active and emitting. MOD-UP LED has no functionality in AC Tx test. At this point, you can proceed to characterize Tx module only, or proceed to setup for testing parallel link. To perform link testing, proceed to power up the Rx test board described in the next section and then set up the parallel optical link using a ribbon cable. To characterize Tx module only, use a PAROLI fan-out optical cable. This cable has at one end a 12-fiber SMC connector, and at the other end 12 individual SC fiber connectors. This fan-out cable provides a convenient way of separating and testing individual optical channels. Connect SMC connector end into the PAROLI optical port and SC connector at the other end to a digital sampling scope as shown in Figure 10. 9 10 2 Figure 10 Transmitter test setup Pattern Generator Trigger Out Data In Tx Module Opt IN Trig IN Fan-Out Cable Digital Oscilloscope 3 4 Semiconductor Group 5 V23814/15-S1306-M931, PAROLITM Test Board Tx/Rx AC/DC Test procedure - continued 11 Apply LVDS signal to one of the 12 inputs via SMA connectors. Use configuration Table 4 in for applicable input ports. Make sure that the LVDS voltage is adjusted to account for impedance matching as described in LVDS LEVEL SETTINGS. Use corresponding optical fiber of the fan-out cable to monitor signal using sampling oscilloscope. Pattern should be easily recognizable. Figure 13 Pad locations for LVDS level measurements 1F SMA UOH-UO UOH UOL UO 10 k 12 UO Testing of AC receiver module This section describes the step-by-step procedure to power up and test AC Rx module. Check Rx test board configuration for AC module testing. Generally, test boards are factory set for AC or DC testing. However, changes can be made, if necessary, using instructions in the TEST BOARD CONFIGURATION section of this data sheet. Test procedure 1 Make all required power supply connections, 3.3 V for VCC, +5 V LEDs and OpAmp. Set blue DIP-switch (Figure 7) to 3 V setting to apply 3.3 V via banana plugs. Set jumpers to MANUAL mode. CLK-SEL switch has no functionality in AC Rx test. Set all other slide switches, ENSD, OEN and RESET, to level HIGH. Verify all supply voltages using a digital voltmeter. Switch off all power supplies to install PAROLI Rx module. Install PAROLI Rx module and apply mechanical clamp to hold Rx module in place (Figure 8). External cooling is not necessary for AC Rx module. At this point, SD11 LED will be ON, indicating no light on fiber #12. Note: If you are using an earlier version of test board, this functionality is reversed and LED will be OFF. LOCK-DET LED has no functionality in AC Rx test and will be OFF. FRAME-DET is fiber #1 in this case, and this LED will come ON when an optical signal through fiber #1 is applied. Connect optical cable to Rx optical port. Optical signal can be applied either by using a PAROLI fan-out cable and using a modulated optical source as shown in Figure 11, or by using a PAROLI Tx module and PAROLI jumper cable as shown in Figure 12. TEST PROCEDURE FOR DC PAROLI MODULES This section describes the step-by-step procedure to set up PAROLI test boards for performing tests on Tx and Rx modules. Testing of DC transmitter module This section describes the step-by-step procedure to set up and test DC Tx module. Check the Tx test board configuration for DC module testing. Generally, test boards are factory set for AC or DC testing. However, changes can be made if necessary using instructions in TEST BOARD CONFIGURATION section of this data sheet. 1 Make all required power supply connections, 3.3 V for VCC, 2.4 V for LVDS, +5 V and -5 V for LEDs and OpAmp. Set blue DIP-switch (Figure 5) to 3 V setting and use banana plugs for power supply connections. Apply 2.4 V so that static HIGH or LOW is applied to LVDS inputs. To apply static HIGH, connect +ve terminal to H, and -ve to L, and finally connect L to VEE. To apply static LOW, connect +ve terminal to L, and -ve to H, and finally connect H to VEE. Set CLK-SEL switch to HIGH or LOW as required by the application. Setting CLK-SEL to HIGH will select STROBE mode. Setting CLK-SEL to LOW will select SCI mode. Set both electrical jumpers to MANUAL mode. Turn on all supply voltages, and verify voltage levels using a digital voltmeter. See page 10 for LVDS voltage settings. Switch off all power supplies to install PAROLI Tx module. Install PAROLI Tx module. To install Tx module, drop the module in the alignment holes. The module will fit snugly and cannot be moved laterally. Now apply the mechanical clamp to hold Tx module in place. Laser enable function is supported only in AUTO mode. To use the test board in MANUAL mode, laser controller must be enabled. Use a jumper to short pin #5 and #6 (3rd row from the left) of the PCI connector #2, as shown in Figure 9. Laser enable green LED will turn ON when power is applied to the test board. 2 3 4 5 6 7 8 9 2 3 10 4 5 6 Figure 11 Rx test setup using fan-out cable Fan-Out Cable Laser Modulated Source Trig Out Rx Module Digital Oscilloscope Elec IN Trig IN 7 8 Figure 12 Rx test setup in parallel link Data In Pattern Generator Tx Module Trigger Out Trig IN Rx Module Optical Cable Data Out Digital Oscilloscope Elec IN Semiconductor Group 6 V23814/15-S1306-M931, PAROLITM Test Board Tx/Rx AC/DC Figure 14 Air inlet for cooling module Testing of DC receiver module This section describes the step-by-step procedure to set up and test DC Rx module. Check Rx test board configuration for DC module testing. Generally, test boards are factory set for AC or DC testing. However, changes can be made if necessary using instructions in the TEST BOARD CONFIGURATION section of this data sheet. 1 9 Cooling is recommended during testing of DC Tx module. Therefore, either use an external fan or connect air supply to the port provided as shown in Figure 14. Switch on the power supplies, and apply differential clock input at SMA connectors marked CIN and CIP. Activate Tx by toggling RESET switch to LOW, and then to HIGH. This will reset the Tx module, and MOD-UP and LCU LED will be ON. LCU LED ON indicates that the Laser control is ON and laser array is emitting. MOD-UP LED ON indicates that laser is active and PLL is working. MODUP LED OFF indicates PLL problem and possible defect of the module. At this point you can proceed to characterize Tx module only or proceed to setup for testing parallel link. To perform link testing, proceed to power up the Rx test board described in the next section and then setup the parallel optical link using a ribbon cable. To characterize Tx module only, use a PAROLI fan-out optical cable. This cable has at one end a 12-fiber SMC connector, and at the other end, 12 individual SC fiber connectors. This fan out cable provides a convenient way of separating and testing individual optical channels. Connect SMC connector into the PAROLI optical port, and SC connector at fiber #1 to a digital sampling scope as shown in Figure 15. 2 3 4 5 6 Make all required power supply connections, 3.3 V for VCC, +5 V and -5 V for LEDs and OpAmp. Set blue DIPswitch (Figure 7) to 3 V setting and use banana plugs for power supply connections. Set jumpers to MANUAL mode. Set CLK-SEL switch to STROBE or SCI. It should be identical to Tx board setting. Toggle slide switches, EnSD, OEN and RESET to HIGH. Turn on all supply voltages, and verify voltage levels using a digital voltmeter. Switch off all power supplies to install PAROLI Rx module. Install PAROLI Rx module. To install Rx module, drop the module in the alignment holes. The module will fit snugly and cannot be moved laterally. Now apply the mechanical clamp to hold Rx module in place. Cooling is recommended during testing of DC Rx module. Therefore, either use an external fan or connect air supply to the port provided shown in Figure 14. Set up the parallel link as shown and turn on the power supplies. 10 11 12 7 13 8 Figure 17 Test setup for testing DC parallel link Data In Pattern Generator Tx Module Trigger Out Clock In Clock Out Rx Module Elec IN Trig IN Optical Cable Data Out Digital Oscilloscope Figure 15 Tx test setup using fan-out cable Fan-Out Cable Pattern Generator Trigger Out Clock In Tx Module Fiber #1 Trig IN Digital Oscilloscope Opt IN 9 At this time, FRAME DET and LOCK DET LEDs should be ON. SD11 (signal detect on data channel #11, fiber #12) will be OFF, implying presence of optical signal. Note: If you are using an earlier version of the test board, this functionality is reversed and LED will be ON when signal is present. At this point, link is ready to make measurements. Input patterns can be applied and link performance can be evaluated. 14 At this point, optical frame signal can be seen on fiber #1. If STROBE mode is selected, the frame frequency will be a quarter of the clock frequency as shown. For example, for a 200 MHz clock input, the optical frame frequency will be 50 MHz. With no AC input signal applied, you can see 4B/5B encoded signal of f/8 frequency on fiber #2 to #12. This signal is the result of 2:1 electrical multiplexing incorporated in the Tx. The start of the encoded signal may be HIGH or LOW due to the functionality of the encoding scheme and should not be of concern. 10 Figure 16 Frame structure with clock input applied Clock Signal, f Optical Frame, f/4, on fiber #1 Fiber #2 to 12 with no input pattern 4 bits 10 bits 15 At this point, Tx is ready to make measurements. Input patterns can be applied and Tx performance can be evaluated. Semiconductor Group 7 V23814/15-S1306-M931, PAROLITM Test Board Tx/Rx AC/DC Figure 18 PAROLI receiver test board layout 1 3 16 Voltage measurement Lock Det. Reset 2 PCI-Card EnSD OEN 5 S4 8 CLKSel Reset M A OEN Clk Sel Reset EnSD 4 +3V VCC-Module +5V -5V 4 7 6 12 14 13 Frame-Det. Lock-Det. 12 P SDII 11 P 22 P 4 9 1P COP VEE 15 10 11 Description of components and location Label # 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Description of component 37 pin D-sub connector for power supply in Auto mode 50 pin connector to read slide switch status in Auto mode BNC connectors for Reset and PLL delay Banana plug socket for 3.3 V and +/-5 V supply DIP switch for selecting D-sub banana plug option for 3.3 V supply Jumpers for selecting Manual/Auto mode Slide switches LEDs indicators for Auto mode LEDs indicators for module functions 14-pin connector for reading LEDs status in Auto mode SMA connector for clock output SMA connectors for signal outputs Location for checking AC or DC configuration changes Rx module location Connector for air supply for cooling 50 pin connector to read LVDS voltages in Auto mode Semiconductor Group 8 V23814/15-S1306-M931, PAROLITM Test Board Tx/Rx AC/DC Figure 19 PAROLI transmitter test board layout 1 3 4 +3V H 16 L 4 - 5 V+ 5 V PCI-Card 2 5 S4 VCC-Module Module Up Reset 4 8 7 6 12 14 13 9 Mod. Up 10 12 N 11 N 22 N LCU 15 1N Voltage CIN 11 Description of components and location Label # 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Description of component 37 pin D-sub connector for power supply in Auto mode 50 pin connector to read slide switch status in Auto mode BNC connectors for Reset and PLL delay Banana plug socket for 3.3 V and +/-5 V supply DIP switch for selecting D-sub banana plug option for 3.3 V supply Jumpers for selecting Manual/Auto mode Slide switches LEDs indicators for Auto mode LEDs indicators for module functions 14-pin connector for reading LEDs status in Auto mode SMA connector for clock input SMA connectors for signal inputs Location for checking AC or DC configuration changes Tx module location Connector for air supply for cooling 2.4 V Supply for LVDS HIGH / LOW Semiconductor Group 9 V23814/15-S1306-M931, PAROLITM Test Board Tx/Rx AC/DC LVDS LEVEL SETTINGS This section describes how to adjust the LVDS levels of the test equipment to interface with PAROLI modules. Most of the test equipment, including pattern generators, provides output levels for 50 Ohm terminations. PAROLI module inputs require LVDS signals with the input resistance of 100 Ohm. It is, therefore, necessary to adjust the offset and amplitude accordingly at the test equipment. Terminology UOH UOL Ua UO High voltage level Low voltage level Signal amplitude Signal offset Pattern generator interface to LVDS Pattern Generator 50 UiO ULVDS,H = 2UO + Ua/2 ULVDS,L = 2UO - Ua/2 ULVDS,H = 2UO - Ua/2 ULVDS,L = 2UO + Ua/2 ULVDS ULVDS 50 50 50 UiO LVDS level settings U LVDS, H UO=UiO/2 Standard termination for pattern generator Pattern Generator UOH UOL Ua UO Ua = UOH - UOL U LVDS, L 1000 1000 1200 800 Amplitude Ua, mV 600 400 400 600 Offset Uo, mV 650 600 700 550 Low High Level Level UOH,mV UOL,mV 950 800 900 850 350 400 500 250 50 UiO 1600 50 1400 1600 1400 50 UiO UO=UiO/2 50 Siemens Semiconductor Group * Fiber Optics * Wernerwerkdamm 16 * Berlin D-13623, Germany Siemens Microelectronics, Inc. * Optoelectronics Division * 19000 Homestead Road * Cupertino, CA 95014 USA Siemens K.K. * Fiber Optics * Takanawa Park Tower * 20-14, Higashi-Gotanda, 3-chome, Shinagawa-ku * Tokyo 141, Japan www.siemens.de/semiconductor/products/37/376.htm (Germany) * www.smi.siemens.com/opto/fo/fo.html (USA) |
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