SPA Dongle Description
Contents
1. GG ALP Nano USE 1 eg LMHO387 Nano General Control Output Driver Launch Amplitude CLI 4 114 ee ee ALP Framework FIGURE 7 LMH0387 Registers Tab Each register can be examined in detail by either double clicking on the desired registers fold bar with the address and the register name e g 0x00 General Control or by single clicking the icon at the right of the fold bar two inverted carats The Refresh button will re read the currently selected register and the Refresh All will read all registers in the device Changes may be made to the registers by checking or un checking the individual register bits or typing in a new register value in the Value field After setting the appropriate register value the Apply button must be pressed to apply the changes The detailed view of the General Control register is shown in Figure 8 with Verbose Descriptions checked and Figure 9 with Verbose Descriptions un checked SD387EVK User Guide 12 of 23 Rev 1 1 2010 National Semiconductor Corp National Semiconductor Analog LaunchPAD E Ed Tasks ALP Nano USB 1 1 LMHO0387 Nano Xx Information Functional Registers Scripting E ALP Nano USB 1 lt g LMIHO387 Mano value Apply Refresh All verbose Descriptions Display Bits Tvpe Default Mame Description R Carrier Detect Read only O Ma carrier detected on BC IO pin 1 Carrier detected on B2. Ard N LMHO0387 Evaluation Board i April 29 2010 User Guide Overview The SD387 Evaluation Kit EVK enables evaluation of the LMH0387 3G HD SD SDI Configurable I O Adaptive Cable Equalizer Cable Driver A graphical user interface allows managing the SPI registers for the input mode equalizer and can also be used to control the device s I O mode Evaluation Kit SD387EVK Contents The EVK contains the following parts e SD387EVK board assembly with the LMH0387 configurable I O SPA dongle SPI gt USB card USB cable 6 pin parallel cable SD387EVK User Guide Evaluation Board Description Figure 1 shows the SD387 evaluation board and highlights some of its features SD387EVK User Guide 1 of 23 Rev 1 1 2010 National Semiconductor Corp SPI Header JP2 Controls SD HD TX_EN CD n DC Power Connectors PEP 0 E 500 SMA SDI Input LMH0387 Connectors 750 BNC aum Bidirectional I O Y a 50Q SMA SDO Output Connectors B C j Carrier Detect am pNational b Semiconductor D a sd387 FIGURE 1 SD387 Evaluation Board Inputs and Outputs BNC O Input Output SDI Input and SDO Output The bidirectional I O J1 is a 75Q BNC connector When the LMH0387 is configured as an input the input signal on the BNC_IO pin should conform to the SMPTE 424M SMPTE 292M or SMPTE 259M standards When the LMH0387 is configured as an output the BNC IO pin will drive SMPTE SDI signal le
3. LAYOUT NOTE Group LEDs in line LED Green Red 0803 PAG R18 100Kohm FAULT SHDN SS DIODE CC 0ohm open II DO NOT LOAD R21 If R21 is loaded DO NOT MOUNT R20 DO NOT MOUNT U4 This will allow use of 3 3V from U1 internal reguator Bootloader Activation Atmel Dongle Card Document Number Atmel Dongle Card Rev 1 Thursday November 06 2008
4. PS2 GND VCC Cia 0 1uF GND a 5 5 28s e zo 5 G2 C4 SDI R1 ZDIFF100N 1 Z50 1 J2 R2 4 7uF Up 7165 SMA_R_EDGE 75 ace VCC 4 7uF C14 GND 0 1uF C5 SDI 01s 1 ZDIFF100P 1 Z50 2 0 1uF 2 GND SMA R EDGE CENE 4 7uF G 4 1 0 5 GND 6 Ji C 7 Z75 1 275 2 8 MISO 9 BNC EDGE 4 7uF 10 11 C6 SDO ZDIFF100P 2 Z50 3 J4 GND SM R EDGE 4 7uF Cu C SDO ZDIFF100N 2 Z50 4 J5 SMA_R_EDGE 1uF 4 7uF R3 220 V SEEN V GND R6 GND c11 GND Zero VCC GND 1uF VCC SD HD SDHD TX ENABLEX_ENABLE CD CDb HDR 4X2 a VCC g o LAYOUT NOTE CD Z50 n W 40MIL ZO 504 595 SPI HEADER D1 JP1 Y LED GREEN LAYOUT NOTE LAYOUT NOTE Z75 n W 20MIL ZO 75 5 R4 ZDIFF100P n ZDIFF100N n DIFFERENTIAL 1000HM IMPEDANCE 300 GND Tite 6D387 Evaluation Board for the LMH0387 Sheet 1 of 1 National Size B REVA Semiconductor Date 4 19 2010 File SD387 SchDoc http www national com Copyright National Semiconductor 2010 1 2 3 4 5 6 SPA Dongle Bill of Materials Reference Designator Qty Description Manufacturer Manufacturer Part No CAP CER 1UF 50V 10 X7R 0603 CAPACITOR TANT 1 0UF 16V 10 SMD CAPACITOR TANT 4 7UF 16V 10 SMD Osram Opto LS M670 H2L1 1 0 10 D1 1 LED TOPLED 628NM SUP RED CLR SMD Semiconductors R18 Z Osram Opto LSG T670 JL 1 0 JL 1 0 D5 D2 2 LED TOPLED 628 570 RED GRN 4PLCC Semiconductors 10 R18 Z Fairchild RI R4R5 R16 R20 RIT00 6 RES ZERO OHM 1 10W 5
5. 0603 SMD RES 22 OHM 1 16W 3300PPM 5 0603 RES 47K OHM 1 16W 1 0603 SMD RES 1 0K OHM 1 16W 1 0603 SMD RES 100K OHM 1 16W 1 0603 SMD RES 120K OHM 1 16W 1 0603 SMD Panasonic ERA 3AEB124V Atmel SPA Dongle Schematic SD387EVK User Guide 22 of 23 Rev 1 1 2010 National Semiconductor Corp lt gt 56 8 RESETB vec LAY OUT NOTE C1 next to pin 52 of U1 PA T 0 LAYOUT NOTE VEC C5 next to pin 3 LAYOUT NOTE LE Ferrite amp capacitors 5 LAYOUT NOTE close to the MCU D D resistors close to the MCU 1uF 48 c SO UVCON lt VBUS UV ie PE J on ERU R2 22 0hm 0603 D 4 Nm 7 CI T P 22 000 0603 D e mm 1 x Y GND G f dco HT TE BELL VBUS g AT90 AVR 8 Bit o G O X o Lan PCB SHIELD zac PBO 0 Q v R1 R2 lt 8 E 8 202 cr A ETE p a a Ooo gc 5 z Su Zire 36 5RN o O99 uF PB4 E a o R N R4 0803 PB6 46 ane 93 N p gt 2 00 KLL poi7 0 Q AGND R5 0603 a 00 gt PBI7 0 PB Vas OO O C3 Si og O C3 LAYOUT NOTE 0 7 Resistor close ls to the device ia la ala AP NNNNNNSNNPD O0 aj EE 7 PD 7 0 Lu p lt P lt 65 JP7 GND JP8 PBi MCK SPI Yi GND 2 MOSI SPI 6 PB4 CS I2S PBS MISO SPI oO PDO SCL 12S PBO SS SPI Ar 9 1 SDA I2S GND H6MHz CRYSTAL LAYOUT NOTE 10 11 C6 next to pin 2 of U1 F i 5p i 5pF RESETB Reset Circuit PA 7 0 lt __ gt PAIZ 0
6. Configures the LMH0387 for the input mode equalizer enabled and cable driver disabled This is the default setting The LMH0387 equalizer is set to auto sleep and if TX EN is connected to PAO then PAO will drive TX EN low to disable the LMH0387 cable driver If this TX EN gt PAO connection is not made then the LMH0387 cable driver should be manually disabled by setting a jumper to tie TX EN to GND Output Tx Mode Configures the LMHO0387 for the output mode cable driver enabled and equalizer disabled The LMH0387 equalizer is forced to sleep If TX EN is connected to PAO then PAO will drive TX EN high to enable the LMH0387 cable driver If this TX EN gt PAO connection is not made then the LMH0387 cable driver should be manually enabled by pulling the jumper between TX EN and GND TX EN should be open SD387EVK User Guide 8 of 23 Rev 1 1 2010 National Semiconductor Corp Tx Loopback Mode Configures the LMH0387 for the output mode with a loopback path cable driver and equalizer both enabled The LMH0387 equalizer is set to auto sleep If TX EN is connected to PAO then PAO will drive TX EN high to enable the LMH0387 cable driver If this TX EN gt PAO connection is not made then the LMH0387 cable driver should be manually enabled by pulling the jumper between TX EN and GND TX EN should be open In this mode the cable driver output on the BNC O pin is looped back to the LMH0387 equalizer outputs SDO and SDO so the cable drive
7. allows control of the SD HD pin for setting the slew rate for the BNC IO pin while the LMH0387 is in the output mode cable driver This pin may be connected to GND for the faster HD 3G slew rate or connected to Vec for the slower SD slew rate The LMH0387 SD HD pin has an internal pulldown to enable the HD 3G slew rate by default SPI Header JP1 JP1 is the SPI Serial Peripheral Interface header It allows access to the SPI pins SS MISO MOSI and SCK to control the SPI registers of the LMH0387 equalizer To use the SPI interactive GUI plug the 6 pin parallel cable between this header and JP7 on the SPA dongle to connect the pins one for one as shown in Table 1 The SPA dongle requires special software and must be connected to the PC via the USB see the Software Setup section TABLE 1 SPI Connections between SD387 and SPA Dongle SD387 JP1 SPA Dongle JP7 Pin 4 Name Pin 4 Name Carrier Detect LED D1 D1 shows the status of Carrier Detect at the LMH0387 equalizer input This LED is GREEN when an input signal has been detected at the BNC IO pin and OFF when no input is detected SD387EVK User Guide 3 of 23 Rev 1 1 2010 National Semiconductor Corp SPA Dongle Description The SPA dongle is required to use the SPI interactive GUI The SPA dongle connects between the LMH0387 SPI pins and the USB input of a PC The SPA dongle is shown in Figure 2 JP7 is the SPI Header The SPA dongle is powered through the USB and the D1
8. exe file to a temporary location that can be deleted later Make sure the SPA dongle is not connected to the PC The following installation instructions are for the Windows XP Operating System Install the ALP software Execute the ALP Setup Wizard program called ALPF monthdayyear major version minor version exe ex ALPF 04062010 128 0002 exe that was extracted to a temporary location There are 7 steps to the installation once the setup wizard is started 1 Select the Next button 2 Select accept the agreement and then select the Next button 3 Select the location to install the ALP software and then select the Next button 4 Select the location for the start menu shortcut and then select the Next button 5 There will then be a screen that allows the creation of a desktop and Quick Launch icon After selecting the desired choices select the Next button 6 Select the Install button and the software will then be installed to the selected location 7 Uncheck Launch Analog LaunchPAD and select the Finish button The ALP software will start if Launch Analog LaunchPAD is checked but it will not be useful until the USB driver is installed Connect JP1 of the SD387 evaluation board to JP7 of the SPA dongle via the 6 pin parallel cable as shown in Table 1 Power on the SD387 evaluation board with a 3 3 VDC power supply Connect the SPA dongle to the PC with the USB cable The Found New Hardware Wizard wi
9. set for normal mode Note that the indicator shows the status of the register bit not whether the device is actually in extended 3G reach mode or not If extended 3G reach mode is set the equalizer will remain in this mode until the input cable is physically changed or power is cycled For example extended 3G reach mode is forced and then it is turned off The indicator will show it is off but the equalizer will still be in extended 3G reach mode until the input cable is changed or the device power is cycled The GUI provides a simple way to reset the extended 3G reach mode the Extended 3G Reach Mode Reset button This button toggles the equalizer sleep mode and has a similar effect to removing and re applying the input cable SD387EVK User Guide 10 of 23 Rev 1 1 2010 National Semiconductor Corp Equalizer Input Launch Level Control FE KE deua Note The GUI automatically sets the nominal equalizer launch amplitude setting upon osten ua startup specifically it writes 30h to SPI register 02h This nominal setting is required od O 6dB for correct equalizer operation with the default SMPTE 800 mV pp launch amplitude Launch Amplitude Fine Tuning and no external attenuation If the equalizer launch amplitude setting is changed it can be instantly set back to this nominal setting by clicking the Set To Default button The Equalizer Input Launch Level Control is useful to compensate for attenuation of the input signal prior to the equaliz
10. LED is RED when the SPA dongle is connected to a PC via the USB to indicate the board is powered PAO SPI Header MADE IN USA CEN F Fw 3 b 2 Qi egery 1 Raahe A e O Be JEL BRL dM m if i USB A Connector Power Indicator FIGURE 2 SPA Dongle Figure 3 shows the connection between the SD387 and the SPA dongle For proper operation the SPI pins must be connected between the SD387 JP1 and the SPA dongle JP7 Optionally a single wire may be connected between the SD387 TX EN pin JP2 and the SPA dongle PAO J7 to enable software control of the LMH0387 cable driver enable functionality and allow the GUI to fully control the LMH0387 I O Mode as described on page 8 If this connection is not used then the TX_EN can be controlled manually with a jumper x WE 2 C E i Fa ra a m i jf OOO O ooo0a AE T Hfr 5 Wl ares LM ye yuveo 20009 90000 m S T SPI connection 19NOQ V Sees ZES o i E gt x om i iom wn 1 i required COD m TX EN gt PAO connection optional FIGURE 3 SD387 Connection to SPA Dongle SD387EVK User Guide 4 of 23 Rev 1 1 2010 National Semiconductor Corp Software Setup System Requirements Operating System Windows XP or Vista USB 2 0 Installation Download the latest software from the LMH0387 Evaluation Board page Extract the ALPF monthdayyear major version minor version exe ex ALPF 04062010 128 0002
11. MC IO pin save RW DxO O Normal operation 1 Equalizer outputs muted RW x Reserved Reserved as D Always write 0 to this bit RW xl Sleep Mode Equalizer sleep mode control Sleep has precedence over Mute 00 Never sleep Disable sleep mode Force equalizer to stay enabled 01 Auto sleep Sleep mode active when no input signal detected 10 Force sleep Force equalizer into sleep mode powered down regardless of whether there is an input signal or nat 11 Reserved z0 RW Oxo Extended 3a Extended 36 reach mode to extend the Reach Mode cable length for 2 97 Gbps applications D Normal operation 1 Extended 36 reach mode if Jol Rew oxo Reserved Reserved as 00 Always write 00 to these bits 5 O01 output Driver 5 Ox02 Launch Amplitude ES D03 CLI ALP Framework FIGURE 8 LMH0387 Registers Tab with Verbose Descriptions National Semiconductor Analog LaunchP AD Tash ERE ALP Nano USB 1 1 LMHO387 Nano GE ALP Nano USB 1 qu LMHU38 Mann T Carrier Detect amp Mute S Reserved 4 3 Sleep Mode 2 Extended 3G Reach Mode if Jol Reserved 4 Ox01 output Driver E Ox02 Launch Amplitude ES x3 CLI ALF Framework FIGURE 9 LMH0387 Registers Tab without Verbose Descriptions SD387EVK User Guide 13 of 23 Rev 1 1 2010 National Semiconductor Corp The Display button provides another view of the register set and is depicted in Fi
12. MH0387 equalizer at 2 97 Gbps with 120m Belden 1694A cable on the input The input signal is a 2 97 Gbps PRBS10 from the Agilent 86130A BERT The input is connected differentially to the SDI SMA inputs on an SD302 eval board with matched 3 SMA cables The SD302 output signal is driven through 120m of Belden 1694A cable and received at the BNC_IO input on the SD387 The SD387 SDO SMA output is connected via a 3 SMA cable to the 50Q SMA input on the Tektronix DSA7125 12 5 GHz Oscilloscope 100psidiv 1 0TS s ET 1 0ps pt FastAcq Sample l 569 240 acqs RL 1 0k Auto April 28 2010 16 46 09 C2 50 0mVidiv 500 4y 12 5G FIGURE 12 LMH0387 Equalizer Output at 2 97 Gbps with 120m SD387EVK User Guide 16 of 23 Rev 1 1 2010 National Semiconductor Corp Input and Output Return Loss Figure 13 shows the LMH0387 input and output return loss measured at the BNC_IO on the SD387 The return loss is measured on the Rohde amp Schwarz ZVR 75 4GHz network analyzer with a 75Q BNC to 75Q Type N connector on the input For the input return loss the equalizer is active and the cable driver is disabled TX EN 0 For the output return loss the equalizer is forced to sleep and the cable driver is enabled with an 8 MHz clock input signal applied to the cable driver inputs CHI SLESM dB MAG 5 dB REF 15 dB lt 23 08 np ATH TT dg Bu JITLA SFAR y we mpm l START 5 MHz 200 MHz SIOE a GHz FIGURE 13 LMH0387 Input an
13. O38 Mana LMHO387 I O Made Cable Driver TX EM 9 Input Rx Mode Cable Driver Disabled CO Output Tx Made Extended 3G Reach Mode Reset CO Tx Loopback Mode Equalizer Sleep Mode Equalizer Sleep Status Qon Oor Carrier Detect BMC IO Coarse Amplitude 5 Suto Signal Present nds O 6dB Set To Default Launch Amplitude Fine Tuning Equalizer Nat Sleeping Equalizer Input Launch Level Contral Equalizer Cable Lenath Equalizer Gutput Swing Equalizer Gutput Offset Qutipul Swing 700 Output Offset Offset From Nominal ALF Framework FIGURE 6 LMH0387 Functional Tab I O Mode Control 1 0 Mode Control The I O Mode Control can be used to control the I O Mode of the LMH0387 LMHO387 1 0 Mode Cable Driver TX EN provided an additional wire is connected between the SD387 TX EN and the input Rx Mode B Gable Driver Disabled SPA dongle PAO as shown in Figure 3 The connection between TX EN and Output Tx Made PAO allows software control of the LMH0387 cable driver enable functionality D Tx Loopback Made If the SD387 TX EN is not connected to the SPA dongle PAO then TX EN may be controlled manually with a jumper and the I O Mode Control will have no effect on the LMH0387 cable driver The default LMH0387 I O Mode setting is the Input Rx Mode or equalizer mode This default setting allows full control of the LMH0387 equalizer The three I O modes are described below Input Rx Mode
14. ate and have only LMH0387 Nano under the Devices pull down menu SD387EVK User Guide 19 of 23 Rev 1 1 2010 National Semiconductor Corp I National Semiconductor Analog LaunchPAD Tasks Ge ALP Nano USE 1 qq LMHO387 Nano n Connector 4 aa BA Connector 3 O Srg o as I n H B Switch Block nm h Cereactor aan Rae i E i i ou LI x LL 4 EBESNES Oig E ns E ipm Ad a a 5 s a i EE E 23 m pf E Fa ds i CN Nos wu i Sa a ee git m GA Li L ai Analog LaunchPAD ALP100 1 VIER LLL at Lr a ALP Framework ar FIGURE 18 Analog LaunchPAD Screen with Demo Mode Off SD387 Bill of Materials Reference Designator Qty Description h Manufacturer Manufacturer Part No ECJ 0EBOJA75M ECJ 0EBOJ105M ECJ 0EB1C104K ECJ 0EB1C103K LTST C190GKT 31 6009 J2 J3 J4 J5 4 SMA 50 ohm edge launch Components 142 0701 851 929834 02 36 Resistor 715 ohm 1 16W 1 0402 Resistor 75 ohm 1 16W 1 0402 Resistor 220 ohm 1 16W 1 0402 Resistor 100 ohm 1 16W 1 0402 Resistor 0 ohm 1 10W 5 0402 PRO National U1 1 LMH0387 Configurable IO Semiconductor LMH0387SL SD387 Schematic SD387EVK User Guide 20 of 23 Rev 1 1 2010 National Semiconductor Corp 2 3 4 5 6 PS1 VCC vcc
15. d Output Return Loss SD387EVK User Guide 17 of 23 Rev 1 1 2010 National Semiconductor Corp Trouble Shooting If the following window Figure 14 opens after starting the ALP software double check the hardware setup No Devices Detected FIGURE 14 Analog LaunchPAD No Devices Error It may also be that the USB driver is not installed Check the device manager There should be an NSC ALP Nano Atmel device under the Universal Serial Bus Controllers as shown in Figure 15 Device Manager File Action View Help Hes 2 Sound video and game controllers System devices Universal Serial Bus controllers E Generic USB Hub Generic USB Hub Intel R ICHE Family USE Universal Host Controller Intel R ICHE Family USE Universal Host Controller E Intel R ICHS Family USE Universal Host Controller E Intel R ICH8 Family USE Universal Host Controller Intel R ICHE Family USE Universal Host Controller Intel R ICHE Family LISB2 Enhanced Host Controller 2836 Intel R ICHE Family LISB2 Enhanced Host Controller 283A ea HSC ALF Nano Atmel Sierra Wireless MCS725 Device LISB Root Hub LISB Root Hub E USE Root Hub LSB Root Hub gt LISB Root Hub LISB Root Hub LISB Root Hub FIGURE 15 Windows XP Analog LaunchPAD USB Driver The software should start with only LMHO0387 Nano in the Devices pull down menu If there are more devices then the software is most likely in
16. demo mode When the ALP is operating in demo mode there is a Demo Mode indication in the lower left of the application status bar as shown in Figure 16 SD387EVK User Guide 18 of 23 Rev 1 1 2010 National Semiconductor Corp 2050 2051 eua 2634 2035 NM National Semiconductor Analog LaunchPAD Tasks o ul ALP Board 1 m LMHO340 qq LMHO341 qu LMHOS40 qu LMHO341 07 T iz ALP Board 2 d apa qq DS32ELXD124 Latus Connector 4 O TL Connector 3 I DS532ELXO124 pium DS32ELxO0421 Seg a a ebur UE do pesos T a a S Es cece e ar Er omr z ALP Board 3 SU Only ge LMH6512 GS ALP Board 4 u T na i j 7 T mJ i ae qm DPS3640 ew zx e in qe DPa8364 i d S e JS ul ALP Board 5 poe I uL j Xem LMHO340 m x fa ret E d ER EE TE T I 3 oe LMHO341 ae use G Semicondtpnc ni is qq LM49350 i LIM g h Analog LaunmchiP AD a G opi amp ALP Nano 1 T z a react 1 aa Poon cas E p 2 ALP Mana 2 z qib LMHO303 Fares i e m Connector 1 aF ALP LPT MDIC 1 com aes Ee s gr Eej DPG3849 i LU Port 1 7 Port 2 Opal Kelly x noe 3 q P Tt i cmh n FIGURE 16 Analog LaunchPAD in Demo Mode Disable the demo mode by selecting the Preferences pull down menu and un checking Enable Demo Mode Enable Demo Mode FIGURE 17 Analog LaunchPAD Preferences Menu After demo mode is disabled the ALP software will poll the ALP hardware The ALP software will upd
17. er due to a passive splitter or non ideal input termination network The Coarse Amplitude control shows the current setting of the Coarse Control register and may be used to set the input for either O dB default or 6 dB of input attenuation At the default setting of O dB the equalizer operates normally and expects a launch amplitude of 800 mVp p With the Coarse Amplitude set to 6 dB the equalizer is optimized for input signals with 6 dB of input attenuation 400 mVp p Offset Fram Nominal The Launch Amplitude Fine Tuning may be used to further fine tune the equalizer E input compensation from 0 2 dB to 4 1 dB The Launch Amplitude Fine Tuning may be set either by clicking on the or buttons or by grabbing and spinning the handle on the knob for a quick adjustment Equalizer Cable Length apelet eene Lenet The Equalizer Cable Length shows the interpreted Belden 1694A cable length of the CLI register both with a visual bar graph and a decimal readout The Equalizer Cable Length is only valid when an input signal is detected and is greyed out when there is no input to the LMH038 equalizer 120 m SD387EVK User Guide 11 of 23 Rev 1 1 2010 National Semiconductor Corp Registers Tab The Registers tab displays all registers for the LMH0387 equalizer Figure 7 shows the Registers tab The Value field indicates the value of the currently selected register National Semiconductor Analog LaunchPAD Tasks
18. gure 10 The Display dialog supports the Windows copy command Ctrl c Register Display ALP Mano USB 1 LMH0387 Mano Connector 1 Register Display ALP Mana USB 1 LMHOS87 Mana Connector 1 Register Data Mame Ox0000 xe8 General Control Ox0001 xe4 Output Driver Ox0002 O30 Launch Amplitude Ox0003 0x66 CLI FIGURE 10 LMH0387 Register Display The Load and Save buttons provide a handy mechanism for restoring or saving the register set external to the evaluation board SD387EVK User Guide 14 of 23 Rev 1 1 2010 National Semiconductor Corp Typical Performance Cable Driver Output Figure 11 shows the typical output waveform from the LMH0387 cable driver at 2 97 Gbps The input signal is a 2 97 Gbps PRBS10 from the Agilent 86130A BERT The input is connected differentially to the SDI SMA inputs on the SD387 with matched 3 SMA cables The LMH0387 cable driver slew rate is set for HD 3G mode SD HD 0 The SD387 BNC O output is connected through 1m of Belden 1694A cable to the TCA75 75Q input module on the Tektronix DSA7125 12 5 GHz Oscilloscope C c2 100mV div 500 By 4 0G A f 320mv 62 5ps div 1 6TS s ET 625fslpt Horz Diy 3 408125ns FastAcqg Sample 386 656 acqs RL 1 0k Auto April 28 2010 15 06 57 FIGURE 11 LMH0387 Cable Driver Output at 2 97 Gbps SD387EVK User Guide 15 of 23 Rev 1 1 2010 National Semiconductor Corp Equalizer Output Figure 12 shows the typical output waveform from the L
19. ll open on the PC Proceed to the next section to install the USB driver Install the USB driver There are 6 steps to install the USB driver 1 Select No not at this time then select the Next button 2 Select Install from a list or specific location then select the Next button 3 Select Search for the best driver in these locations Uncheck Search removable media and check Include this location in the search 4 Browse to the Install Directory which is typically located at C Program Files National Semiconductor Corp Analog LaunchPAD vx x x Drivers and select the Next button Windows should find the driver 5 Select Continue Anyway 6 Select the Finish button The software installation is complete The ALP software may now be launched as described in the next section SD387EVK User Guide 5 of 23 Rev 1 1 2010 National Semiconductor Corp Software Description Startup Make sure all the software has been installed and the hardware is powered on and connected to the PC Execute Analog LaunchPAD from the start menu The default start menu location is Programs National Semiconductor Corp Analog LaunchPAD vx x x Analog LaunchPAD The application should come up in the state shown in Figure 4 below If it does not see Trouble Shooting at the end of this document Click on LMH0387 Nano to select the device and open up the device profile and its associated tabs I National Se
20. miconductor Analog LaunchPAD Tasks ul ALP Mana USE 1 eg LMHO387 Nano mi Connector 4 J i i i i ii i nt L 8 Switch Block r t a ds m uauuER EEEE pu s LIT i ir 2lnlii as BS Lu 11 NN 26400 ie Os ee X Er EET wwe a ai i Ef k GR sg E E LI J 2 ef Connector PeT a Fm agl apm I il T WoW Ha o aM T ALP Framework a FIGURE 4 ALP Startup Screen for the LMH0387 Information Tab The Information tab is shown in Figure 5 SD387EVK User Guide 6 of 23 Rev 1 1 2010 National Semiconductor Corp National Semiconductor Analog LaunchPAD Tasks ALP Nano USB 1 1 LMH0387 Nano Information Functional Registers Scripting GS ALP Nano USB 1 L HH0387 E LMIHO38 Nana 3 Gbps HD 5D SDI Configurable I U Adaptive Cable Equalizer Cable Driver LMH0387 Contigurable I O Cable Driver Return Loss Network Cable Equalizer ALP Framework FIGURE 5 LMH0387 Information Tab Functional Tab The Functional tab is the main tab of the GUI and presents a high level view of the LMH0387 equalizer as shown in Figure 6 SD387EVK User Guide 7 of 23 Rev 1 1 2010 National Semiconductor Corp National Semiconductor Analog LaunchPAD Sele Xx Tasks BE ALP Nano USB 1 1 LMHO387 Nano i x ce ALP Mana LISB 1 IO Made Control Equalizer Gutput Mute Extended 3G Reach Mode Off Off Qe LMH
21. ng is 700 mVp p The Equalizer Output Swing may be set either by clicking on the or buttons or by grabbing and spinning the handle on the knob for a quick adjustment Output Swing 700 my SD387EVK User Guide 9 of 23 Rev 1 1 2010 National Semiconductor Corp Equalizer Output Offset Scale wud aez The Equalizer Output Offset control shows the current value of the LMH0387 equalizer output common mode voltage and allows adjustment in 200 mV increments from 1 05V to 1 85V At the Max setting the outputs are referenced to the positive supply and the output common mode is 2 1V The default setting is 1 25V The Equalizer Output Offset may be set either by clicking on the or buttons or by grabbing and spinning the handle on the knob for a quick adjustment Output Offset 1 25 V Equalizer Output Mute Equalizer Output Mute The Equalizer Output Mute indicator shows the mute status and the button may be used to cil toggle the mute function The indicator is GREEN to indicate mute equalizer outputs are muted and OFF to indicate normal mode outputs are not muted Extended 3G Reach Mode Extended 36 iar Mode The Extended 3G Reach Mode indicator shows the status of the Extended 3G Reach Mode register bit and the button may be used to toggle this register bit The indicator is GREEN when the bit is set for extended 3G reach mode and OFF when the equalizer is ae oe ee
22. r output may be observed both at BNC_IO pin and at the SDO SDO output pins The Cable Driver TX EN indicator shows the current status of the TX EN control only if TX EN is connected to PAO It is GREEN to indicate TX EN is driven high and the LMH0387 cable driver is enabled or OFF to indicate TX EN is driven low and the LMH0387 cable driver is disabled Equalizer Sleep Mode and Carrier Detect Equalizer Sleep Made dap det ese Er The Equalizer Sleep Mode control shows the status of the Sleep Mode Oon Scil Micros register bits and allows control over the sleep mode The Equalizer Sleep O off EHI une me Mode settings are as follows 5i P t Auto Moe On Force the equalizer into sleep mode powered down regardless of whether there is an input signal or not Off Disable sleep mode force equalizer to stay enabled Auto Sleep mode active when no input signal detected default mode The Equalizer Sleep Status indicator shows the current sleep status of the equalizer It is GREEN to indicate sleeping or OFF to indicate not sleeping The Carrier Detect shows the status of the BNC_IO input carrier detect It is GREEN to indicate the input signal is present or OFF to indicate the input signal is absent Equalizer Output Swing Eae tasr CLUB E The Equalizer Output Swing control shows the current value of the LMH0387 equalizer output amplitude and allows adjustment in 100 mV increments from 400 mV p p to 800 mVp p The default setti
23. vels 800 mVp p into 75 The SDI input connectors J2 and J3 are 5002 SMA connectors This cable driver input includes a 100 differential termination resistor R5 at the LMH0387 device and is optimized for 100 differential input The SDO output connectors J4 and J5 are 50 SMA connectors When using only one side of this equalizer output pair the other side should be terminated with a 50 SMA termination For example when only using the SDO output SDO should be terminated with a 500 SMA termination SD387EVK User Guide 2 of 23 Rev 1 1 2010 National Semiconductor Corp DC Power Connectors The VCC and GND power connectors should be powered with a DC input voltage of 3 3V 5 3 6V maximum JP2 Controls CD JP2 allows monitoring of the Carrier Detect CD at the BNC_IO pin while in the input mode equalizer CD is asserted low when an input signal is detected at the BNC IO pin and high when no input signal is present TX EN JP2 allows control of the TX EN pin to enable or disable the cable driver The LMH0387 TX EN pin has an internal pullup to enable the cable driver by default so this pin may be left unconnected when using the LMH0387 in the output mode To disable the cable driver place a jumper to tie TX EN to GND When using the LMH0387 in the input mode the cable driver must be disabled by tying TX EN low TX EN may optionally be controlled via the GUI using the SPA dongle as described below SD HD JP2
Download Pdf Manuals
Related Search