EV9900A (CMX990) Evaluation Kit User Manual
Contents
1. Wy 64 PER 19 au un Zh Can EN ve ax Las Spy CET 451957 Dior eztu Dor 1495 4equinn P aN CN 0 1 259 a wr Zal 9ldl Lidl gea x095 Sidi Sidi UM9900A 3 top Figure 4a PCB Layout 14 2007 CML Microsystems Plc Evaluation Kit for CMX990 EV9900A LE or TP4 Ed 16V C121 Ton T u11 a C221 me riso AE zz HU00H00Z 02 U13 Le C127 C131 f0nF 100uF 16V2. Temp Sensor Uncommitted Optional Elements buffer amplifiers Default U npopulated Seno as gt VCTCXO D Optional paths p p p v Yy gt Temp Sensor AUX ANU Aux VCO Ki BF TX OUT CMX990 f e External e LO lt gt t Inputs RF ANT a ZN Switch Optional ae Main VCO Filter lt J Module Attenuator Ne RXIN J ne Crystal Discrete Main j 2 Filter T vco IF OUT IF IN Figure 1 Block Diagram 2007 CML Microsystems Plc 2 UM9900A 3 Evaluation Kit for CMX990 CONTENTS Section 1 Brief Description ste A eaa anarie ates 2 Preliminary Information 2 1 Laboratory Equipment 2 2 Handling Precautions 0 0 00eeennna rn 2 3 Approvals 20 in se MN ire einer dites res 3 QUICK Start a nan as 3 1 Setting Up 2 5552 55e a est miennes 3 2 Adjustments 2 3 3 QOperatiO g AR A aeda oE EKAA a aA Saa 4 Signal ISS nasa ina ar 5 Circuit Schematics and Board Layouts 6 Detailed Description 6 1 Hardware Description 6 2 Adjustments and Controls 6 3 Firmware Description 6 4 Software Description 6 5 Application Information 6 6 Evaluation Tests 6 7 Troubleshooting T Performance Specifications 7 1 Electrical Performance POC OMIM isss sinna nan aa sina agna A aa A
3. operation over an 65dB range approximately 8 to 57dBm This is to permit the loop to lock prior to commencing power ramping Evaluation Tests The EV9900A is intended to allow evaluation of CMX990 RF and baseband performance The following is a list of typical tests from radio modem standards e g EN300113 Some guidance notes on likely EV9900A performance at 410 430MHz are provided Frequency Error Compliant based on a selected 14 4MHz VCTCXO 2007 CML Microsystems Plc 19 UM9900A 3 Evaluation Kit for CMX990 EV9900A Adjacent Channel Power ACP 60dB adjacent channel power can be demonstrated for 12 5kHz channels with G M FSK B 0 27 and 8kbit s To achieve this an external LO is required and a TxIF of 45MHz selected 70dB adjacent channel power can be demonstrated for 25kHz channels with GMSK B 0 5 and 9 6kbit s Compliance with FCC 47CFR90 210 emission mask D can also be demonstrated using the on board Main VCO module as shown in the following plot A 45MHz TXIF was used This is a 12 5kHz channel mask and requires a change in baud rate to 8kbit s register 29 46h and BT to Marker 1 T1 RBW 100 Hz RF Att 10 dB Ref Lvl 21 30 dBm VBW 1 kHz Mixer 20 dBm 30 3 dBm 420 10000000 MHz SWT 25 8 Unit dB 0 30 5 AB Offset Vil T1 21 30 dB 440 10000000 MHz LN 1SA 100 Center 420 1 MHz 5 kHz Span 50 kHz Date 25 0CT 2007 15
4. 45 05 Figure 5 FCC 47CFR90 210 emission mask D Spurious Emissions EV9900A is not designed to be compliant with spurious emissions limits as transmitter filtering is not included Maximum Usable Sensitivity Typically 117dBm for 1 BER 9 6kbit s BL 0 5 Co channel Rejection With an interferer on the same frequency this is typically 7dB for 25kHz channel spacing operation 9 6kbit s 2007 CML Microsystems Plc 20 UM9900A 3 Evaluation Kit for CMX990 EV9900A Adjacent Channel Rejection ACR ACR performance is limited by local oscillator phase noise Typically 72dB ACR can be demonstrated for 25kHz channels with GMSK B 0 5 and 9 6kbit s using the on board VCO Enhanced performance can be achieved using an external low noise main LO Intermodulation Typically greater than gt 65dB tested as EN 300 113 Spurious Response Rejection A front end SAW filter is not provided on the default configuration EV9900A so spurious response rejection is not guaranteed However the option to fit a filter to reject such responses type selected by user is available The resulting performance will depend upon the operating band used and the particular rejection characteristics of the chosen filter Blocking or Desensitisation Blocking performance is approx 86dB 2007 CML Microsystems Plc 21 UM9900A 3 Evaluation Kit for CMX990 6 7 6 7 1 Troubleshooting The CMX990 is a complex RF and Baseband system
5. CLVO769E LF PMBT4403 100RJR 128 TK R122 10k JR 121 moo R181 us R182 R183 g E VSGOMCO3LF 42 BBO woz AN ssia S98 Cs C206 R156 270R gL4 T2 150R R139 C233 TR4 R179 BCW60D C230 EF TF F g amp FA AE 6 8K C16 C15 C228 22nH C194 C195 6 2pF 8 2pF n A94 AOL val ll L26 Figure 4b PCB Layout bottom 2007 CML Microsystems Plc 15 UM99004 3 Evaluation Kit for CMX990 EV9900A 6 1 Detailed Description The CMX990 datasheet not included but available at www cmimicro com should be referred to for a detailed description of the CMX990 device The EV9900A functionality includes e Demonstration of the CMX990 RF func
6. Temperature sensor voltage 5 0V regulator output for VCO Table 4 Test Points 2007 CML Microsystems Plc 12 UM9900A 3 Evaluation Kit for CMX990 EV9900A JUMPERS Link Default D crotion Ref Position p EV9900A is not configured to use this port EV9900A is not configured to use this port Table 5 Jumpers Notes I P Input O P Output Bl Bidirectional TL Test Loop TP Test Point 2007 CML Microsystems Plc 13 UM9900A 3 EV9900A d Board Layouts Ics an it Schemat Ircul For clarity circuit schematics are available as separate high resolution files The layout on each side is shown in Figure 4 below C Evaluation Kit for CMX990 5 Yoraod VAL Le ELA PTE ba D Y8Lo ae 889 0919 929 810 0819 erly ED ST ELT a 8219 S6LH Shy i Re pou SAREES arr Jor SI Fa Pratl ge 294
7. akain RESA daie agna EA Fi Ranna EV9900A It is always recommended that you check for the latest product datasheet version from the Datasheets page of the CML website www cmlmicro com 2007 CML Microsystems Plc 3 UM9900A 3 Evaluation Kit for CMX990 EV9900A 2 1 2 2 2 2 1 2 2 2 2 3 Preliminary Information The EV9900A provides a platform for the evaluation of the CMX990 To use the EV9900A a separate micro controller or PC for example is required to program the CMX990 via its parallel interface This controlling device is not included on the EV9900A however a CML product is available to provide the controlling functionality the EV9902 Laboratory Equipment The following laboratory equipment is needed to use this evaluation kit Dual Power Supply Spectrum Analyzer RF Attenuator RF Signal Generator For more detailed design or investigation work the other RF test equipment may be required Power Supply The supply input voltage to the PCB for all circuits except the PA is 7 2V 5 25V to 7 6V acceptable On board regulators are provided to generate all voltage rails used on the PCB 3V and 5V rails are used The supply to the PA is directly connected to the PA a voltage of 3 6V is recommended The 7 2V supply should be rated at 1A and the 3 6V supply rated at 2A NOTE Care should be exercised with the supplies as they are not protected for reverse polarity For optimum RF performance the PA supply is
8. connected directly to the RF5110G device so care is required to ensure the RF5110G manufacturer s ratings are not exceeded Handling Precautions Like most evaluation kits this product is designed for use in office and laboratory environments The following practices will help ensure its proper operation Static Protection This product uses low power CMOS circuits that can be damaged by electrostatic discharge Partially damaged circuits can function erroneously leading to misleading results Observe ESD precautions at all times when handling this product Contents Unpacking Please ensure that you have received all of the items on the separate information sheet EK9900A and notify CML within 7 working days if the delivery is incomplete Approvals This product is not approved to any EMC or other regulatory standard Users are advised to observe local statutory requirements which may apply to this product and the radio frequency signals that may emanate from it 2007 CML Microsystems Plc 4 UM9900A 3 Evaluation Kit for CMX990 EV9900A 3 Quick Start This section provides instructions for users who wish to experiment immediately with the evaluation kit more complete description of the kit and its use appears later in this document The EV9900A includes a CMX990 device that is described in its own separate datasheet Accordingly the user should read the CMX990 datasheet before using the EV9900A 3 1 Setting Up The fo
9. interface on the CMX990 which is brought out on connector J13 on the EV9900A The CMX990 datasheet gives details of the registers and commands To operate the CMX990 some typical command sequences are given below Data Rate The default data rate with a 14 4MHz reference is 6000bps Data rates can be configured using the clock control register in the CMX990 C BUS address 29 The following example C code shows a typical configuration for common data rates register_write CLOCK_CONTROL 0x45 119600 bps e g 25kHz channel register write CLOCK CONTROL 0x85 114800 bps e g 12 5kHz channel register_write CLOCK_CONTROL 0x46 118000 bps e g 12 5kHz channel Receive Mode The following example C code shows a typical configuration for reception register_write POWER_UP_2 0x08 Reset register write POWER UP 2 0x01 Vbias on register write POWER UP 1 OxEE Clock BB Vreg Rx on amp Opampst Tx off register write POWER UP 2 OxF1 DACs on register write AUX DAC 1 MSB 169 AFC to mid rail 1 65V Set up synths set_main_synth 0x8480 0x807530 1 750MHZ low side Rx Freq 420 1MHz assuming ref 14 4MHz amp comp 12 5kHz set_aux_synth 0x8090 0x870C 1180 4MHz for 45 1MHz IF assuming ref 14 4MHz amp comp100kHz register_write CONTROL OxE9 AGC max gain amp run IQ offset fine AFC Slow PLL Narrow register_write MODE OxD2 NRQ enabled scrambler enabled INNV bit enabled Main ADC enabled
10. the VCTCXO These are connected to the CMX990 Aux ADC inputs O and 1 respectively Tx Rx Switch Although not configured in the default EV9900A build circuits are provided to implement a Tx Rx switch using PIN diodes See section 6 2 1 Interface The EV9900A provides access to the CMX990 parallel interface via connector J13 The EV9900A has test pins to allow measurement of aux DAC outputs and test pins that allow the user to apply test signals to the aux ADC inputs All RF connectors are SMA type The power connector provides two separate power connections one for the power amplifier and the other to supply all other circuits Adjustments and Controls The user has the ability to configure the EV9900A for a number of different operational scenarios Tx Rx Switch The following modifications need to be implemented on the EV9900A PCB546F evaluation board to enable a classical series shunt RX TX switch Ref 410 430MHz Des value R194 100R C172 1n0 C94 1n0 L21 100nH 1008CS C212 1n0 L16 15nH 0603CS C213 6p8 C226 6p8 The receiver path components L16 C213 C226 form a lumped quarter wave section and will need to vary dependent upon the users operating band L21 would also require a value change The switch will give less than 1dB insertion loss The main consequence with this topology is that only one control line is required and the logic is as follows TX_ON 3V HIGH g
11. EV9900A CML Microcircuits Evaluation Kit COMMUNICATION SEMICONDUCTORS User Manual UM99004 3 December 2008 Features e Complete 400 MHz Transceiver Initial e Test Access for Important Signals Configuration for 410 430MHz Tx 410 430MHz Rx 14 4MHz Reference for 9600bps 8000bps 4800bps etc data rates e Configurable for 800 MHz e g 819 e Parallel Interface to a uC 825MHz Tx 864 870MHz Rx Transceiver ne EV9900 7498 Haag oe 106 i aie y r dep cr f Cisr x Na 882 343 z oe m Ld 4 r 1 Brief Description The EV9900A allows evaluation of the CMX990 Baseband and RF Modem IC The design is a flexible platform to allow users to configure and evaluate the CMX990 for various applications and frequency bands Initial configuration is for 410 430MHz operation with 25kHz channel spacing and 9600bps A number of RF circuits such as VCO s PA and LNA are provided on the EV9900A to facilitate easy evaluation The PA and LNA are configurable for different operating bands through component value changes contact CML for further information Serial numbers 198189 198203 are supplied configured for external Auxiliary LO operation please refer to the Addendum at the end of the document for further information 2008 CML Microsystems Plc 25 November 2008 Evaluation Kit for CMX990 EV9900A Parallel Control External Reference Interface r Input gt
12. EV9900A If incorrectly programmed or modified results will be at variance from datasheet performance Please study the datasheet this manual and the associated schematics and layout drawings carefully when troubleshooting This section provides some suggestions to help users resolve application issues they might encounter Receiver Operation Error Observed Possible Cause Invert current setting of INV bit No packets are received however synthesisers are locked and the receiver otherwise appears to be operating correctly INV bit incorrectly set Incorrect baud rate set Select correct clock control register value Receiver sensitivity is 30dB less Sign bit is incorrectly set Invert current setting on Sign than anticipated bit DC Degraded receiver performance Degraded receiver sensitivity and or imbalance in adjacent channel power in the transmitter i e ACP high is much better than ACP low or vice versa Poor sensitivity on some channels or BER results variable 2007 CML Microsystems Plc Incorrect offset correction There is a_ frequency offset between EV9900A reference oscillator and the test equipment Note EV9900A requires an approximate AFC value to be programmed into the DAC1 A value of 0x95 in register OxOB is a good starting point The main Tx VCO is not powered down and can drift into the Rx band 22 Ensure DC offset correction
13. Rx mode register_write POWER_UP_2 0xF5 Turn LNA on register_write COMMAND 0x60 Acquire DC offset amp AFC DelayBy 90000 NNait for Offset to complete Following the above routines the user may initiate reception of data using the modem task commands in Command register 01 2007 CML Microsystems Plc 7 UM9900A 3 Evaluation Kit for CMX990 EV9900A Transmit Mode The following example C code shows a configuration for the CMX990 transmitter register write POWER UP 2 0x08 Reset register write POWER UP 2 0x01 Vbias on register write POWER UP 1 OxE0 Clock BB Vreg on amp Opamps Tx Rx off register write COMMAND RESET give modem reset command register_write CONTROL 0x00 II register write MODE 0xB1 ARG Tx Mode Scrambler amp Main DAC enabled The user should also ensure that the synthesisers are set to appropriate frequencies and enabled The transmitter is now ready to start transmission but the offset loop is unlikely to lock without modulation being generated To achieve lock write task TSO Transmit Scrambler Output which will result in a continuous sequence of random data being generated by the baseband modem The transmitter is enabled by setting the TxIFRF bit in POWER_UP_1 register register write COMMAND TSO Transmit Scrambler Output register write POWER UP 1 0xE1 Clock BB Vreg Opamps off Tx RFIF on The above sequence just enables the transmitter The pow
14. citors C3 C4 this port may be used to monitor the on board 14 4MHz reference or the external reference input Input to receiver LNA By selecting components this port may be used as an LNA output or input to the receiver mixer NB This port is a test port solder pads designed to allow connection of a coax cable 1 Mixer Output or input to IF filter F2 Output of IF filter F2 or input to CMX990 receiver IF stages EV9900A is not configured to use this port EV9900A is not configured to use this port Monitor point for Tx VCO feedback signal 400MHz 800MHz transmitter output Input or output monitor for main local oscillator Input or output monitor for auxiliary 180MHz local oscillator normally not connected 7 2V power supply input 3 5V power supply for RF power amplifier Power supply ground 8 bit parallel interface from CMX990 to host controller or PC See schematics and CMX990 datasheet for details EV9900A is not configured to use this port EV9900A is not configured to use these pins DAC3 output DAC2 output ADC5 input ADC4 input Void EV9900A is not configured to use this connector TX RX Switch Output Default configuration of EV9900A does not use this connector Table 1 Signal List UM9900A 3 Evaluation Kit for CMX990 EV9900A CONNECTOR PINOUT for J13 Connector Signal Signal dr Connection to digital ground Connection to digital ground CMX990 Addres
15. er amplifier can now be enabled using the DACO Output This DAC has an automatic ramping circuit to allow an accurate power ramping profile to be applied to the power amplifier register write AUX DAC 0 MSB 0x39 Turn PA on at minimum power to all lock For some operating frequencies the free running frequency of the Tx VCO needs to be within certain limits of the desired Tx frequency as described in the datasheet On the EV9900A this can be achieved using the pre charge facility as follows Register write 0x24 0x11 Enable Tx VCO Charge Delay 1000 IWait while VCO tunes Register write 0x24 0x01 Disable Tx VCO Charge The power amplifier may now be either ramped up or for basic testing enabled to the required power An output power of 1W is generally achieved with a DACO value of Oxb0 register_write AUX_DAC_0O_MSB 0xb0 PA output approx 1W 2007 CML Microsystems Plc 8 UM9900A 3 Evaluation Kit for CMX990 4 Signal Lists EV9900A CONNECTOR PINOUT Connector Connector Signal Signal Description Ref Pin No Name Type i RF Clock Clock input output By selecting coupling 2007 CML Microsystems Plc IFOUT IF IN TXI TXQ TX VCO O P TXOUT MAIN LO AUX LO 7 2V 3 5V GND HOST INTERFACE TX RX I Q TX RX I Q DAC3 DAC2 ADC5 ADC4 VOID N A RF_ANT RF RF BASEBAND BASEBAND RF RF RF RF DC DC DC BASEBAND BASEBAND BASEBAND BASEBAND BASEBAND BASEBAND N A N A RF capa
16. hesizers The aim is to cover the frequency bands of 410 430MHz Rx and Tx This requires the following local oscillator frequencies based on the following frequency plan Rx Band MHz Tx Band MHz Tx IF MHz Rx IF MHz LO Range MHz 410 430 45 1 729 8 769 8 410 430 45 730 770 Table 6 Local Oscillator Frequencies The VCOs are packaged parts from Z Communications who provide a range of VCO s in the same package outline so that the user can evaluate other frequency bands if required These VCOs have some performance limitations and are marginal for EN 300 113 adjacent channel requirements for transmitter and receiver The facility to use a discrete high performance low phase noise VCO circuit is also provided TR11 TR12 and coaxial resonator TL6 However this is not enabled in the default configuration This may be re tuned by component changes if required by the user The aux VCO is a discrete design operating at around 180MHz Again this may be re tuned by component changes if required by the user 2007 CML Microsystems Plc 17 UM9900A 3 Evaluation Kit for CMX990 EV9900A 6 2 6 2 1 Differential Amplifiers Simple circuits are provided to allow evaluation of the differential amps on the CMX990 R117 R118 R119 R120 R121 R122 R123 R124 C156 and C157 Temperature Sensors Two temperature sensors are provided one U21 adjacent to the PAs and the other U19 adjacent to
17. llowing procedure is recommended 1 Connect test leads as required including the host Controller to parallel interface J13 The power amplifier output should be connected to a suitable 50Q load THE USE OF AN EXTERNAL 50Q LOAD IS ESSENTIAL TO PREVENT POSSIBLE DAMAGE TO THE PA STAGE 3 Power should be applied to the main supply 7 2V nominal 4 The CMX990 device should be reset by issuing a RESET task to the host Controller parallel interface using the TASK bits b3 b0 of the Command register address 01 5 Power should be applied to the power amplifier supply connector 3 5V The board is now ready for operation An example of typical connections to the EV9900A is shown in Figure 2 30dB RF Attenuator RF Spectrum Analyzer 7 2V Power Amplifier 3 5V Ground RF Signal Generator Figure 2 Typical Connections for EV9900A 2007 CML Microsystems Plc 5 UM9900A 3 Evaluation Kit for CMX990 EV9900A a MI A ABA BAA GA 42 4 Figure 3 EV9900A top and bottom views 3 2 Adjustments None 2007 CML Microsystems Plc 6 UM99004 3 Evaluation Kit for CMX990 EV9900A 3 3 Operation The CMX990 is a complex RF and Baseband Modem IC It is recommended that the user familiarise themselves with the datasheet of this device prior to attempting to use the EV9900A To use the EV9900A the user will need a mechanism to send and receive data and commands via the 8 bit parallel host uController
18. on 7 1 Electrical Performance 7 1 1 Absolute Maximum Ratings Exceeding these maximum ratings can result in damage to the Evaluation Kit Min Max Supply Voltage Vin Vss 0 0 7 6 Supply Voltage Vpa Vss 0 0 4 0 Current into or out of Vin Vpa and Vss pins 0 2 0 Current into or out of any other connector pin 20 20 7 1 2 Operating Limits Correct operation of the Evaluation Kit outside these limits is not implied Notes Min Max Supply Voltage Vin Vss 5 25 7 6 Supply Voltage Vpa Vss 3 0 3 6 Xtal External Clock Frequency 24 2007 CML Microsystems Plc 24 EV9900A Units mA Units MHz UM9900A 3 Evaluation Kit for CMX990 7 1 3 Operating Characteristics For the following conditions unless otherwise specified Evaluation Device Xtal Frequency 14 4MHz Bit Rate 9 6k bits sec VIN Vss 7 2V VPA Vss 3 6V Tamb 25 C Notes Min Typ Max DC Parameters Excluding PA Supply Ibp CMX990 powersaved 1 135 IDD Tx 1 200 Ibp Rx CMX990 internal mixer LNA enabled 1 260 AC Parameters Tx Output Tx output impedance 50 TX output power 30 Rx Input Rx input impedance 50 Rx Sensitivity 2 112 Maximum Input Level without damage 0 Xtal Clock Input Reference Clock Frequency 14 4 Reference Clock Level 3 1 HC Interface See CMX990 Datasheet Notes 1 PCB current consumption not current consumption of the CMX990 2 1 BER 3 Typically clipped sine wave 7 1 3 Operating Characteri
19. s A5 CMX990 Address A4 GNDD GNDD ADDRESS5 ADDRESS4 ADDRESS3 ADDRESS2 ADDRESS1 ADDRESSO GNDD GNDD READN WRITE CSN IRQN OMAN DA BR ON gt kA CT NO CMX990 Address A3 CMX990 Address A1 CMX990 Address A0 Connection to digital ground Connection to digital ground CMX990 read strobe CMX990 write strobe CMX990 chip select input A4 A3 CMX990 Address A2 A1 CMX990 open drain Interrupt output 10k pull up resistor to 3 3V R193 fitted on PCB Connection to digital ground Connection to digital ground CMX990 Data D7 CMX990 Data D6 CMX990 Data CMX990 Data D4 D5 CMX990 Data D3 CMX990 Data D2 CMX990 Data D1 CMX990 Data DO Connection to digital ground Connection to digital ground TX Enable for PIN switch high TX low RX default configuration does not use this signal Spare pin Spare pin Spare pin Spare pin Spare pin Spare pin Spare pin Leave unconnected Leave unconnected Leave unconnected Leave unconnected Leave unconnected Leave unconnected Leave unconnected Table 2 Host Controller Interface 2007 CML Microsystems Plc UM9900A 3 Evaluation Kit for CMX990 EV9900A TEST LOOPS Test Loop Default D scribtion Ref Measurement P LNAON control line from CMX990 EV9900A is not configured to use this port EV9900A is not configured to use this port EV9900A is not configured to
20. sequence has been executed To check if a frequency error exists measure the frequency of the main local oscillator either using the measuring equipment in question or compare results from EV9900A with those from the measurement equipment To overcome a frequency error either a Use a external reference for the EV9900A b Tune to control voltage on the AFC output DAC1 In a normal modem design the Tx VCO U18 would be powered down during Rx mode This is not implemented on EV9900A To overcome the problem the Tx VCO should be disabled during Rx BER testing This can be done by removing R67 UM9900A 3 Evaluation Kit for CMX990 EV9900A 6 7 2 Transmitter Operation Error Observed Possible Cause Remedy Transmitter loop does not lock No modulation is present Ensure the transmitter is outputting data The TSO command can be used to continuously send data for testing Note also the modem needs to be in transmit mode and main DAC enable register 03 Transmitter loop does not lock The PA is not turned on Check the feedback coupling level to the CMX990 Ensure the correct coupler for the band of interest is selected Poor modulation spectrum in An incorrect filter has Select the correct filter using transmit been chosen for the bits 5 and 6 of the Aux PLL M selected Tx IF div MSB register 26 2007 CML Microsystems Plc 23 UM9900A 3 Evaluation Kit for CMX990 7 Performance Specificati
21. st equipment to ensure compliance with this product specification Specific testing of all circuit parameters is not necessarily performed CML Microcircuits UK Ltd COMMUNICATION SEMICONDUCTORS CML Microcircuits USA Inc COMMUNICATION SEMICONDUCTORS CML Microcircuits Singapore Pte Ltd COMMUNICATION SEMICONDUCTORS Tech Support techsupport cmimicro com us sales cmlmicro com Tech Support us techsupport cmlmicro com sg sales cmlmicro com Tech Support sg techsupport cmimicro com Singapore China Tel Tel Tel Tel 44 0 1621 875500 1 336 744 5050 65 67450426 86 21 6317 4107 Fax 800 638 5577 86 21 6317 8916 44 0 1621 875600 Fax Fax Fax Sales 1 336 744 5054 65 67452917 86 21 6317 0243 sales cmlmicro com Sales Sales Sales cn sales cmlmicro com cn Tech Support sg techsupport cmimicro com www cmimicro com
22. stics Timing Diagrams Please refer to CMX990 Datasheet for details 2007 CML Microsystems Plc 25 EV9900A Units mA mA dBm dBm dBm MHz Vp p UM9900A 3 Evaluation Kit for CMX990 EV9900A Addendum EV9900A PCB serial numbers 198189 to 189203 are supplied configured as follows R82 680R R85 470R and R89 OR have been removed to disable the on board Auxiliary VCO R92 has been fitted OR to allow an external Auxiliary LO to be applied via J11 This is due to a problem with the PCB construction that has caused unreliable operation of the Auxiliary VCO when in transmit using a 9OMHz IF The problem can be avoided by using an external source for the AUX LO EV9900A PCB s with other serial numbers are unaffected This does not affect the user s ability to evaluate the CMX990 IC The user should apply 180 4MHz at 3dBm for receive and 180MHZ at 3dBm for transmit operation to J11 2007 CML Microsystems Plc 26 UM9900A 3 Evaluation Kit for CMX990 EV9900A Handling precautions This product includes input protection however precautions should be taken to prevent device damage from electro static discharge CML does not assume any responsibility for the use of any circuitry described No IPR or circuit patent licences are implied CML reserves the right at any time without notice to change the said circuitry and this product specification CML has a policy of testing every product shipped using calibrated te
23. t TX mode TX_ON OV LOW gt RX mode This signal is buffered by TR13 and TR14 due to the current required for low transmit through loss 2007 CML Microsystems Plc 18 UM9900A 3 Evaluation Kit for CMX990 EV9900A 6 2 2 6 2 3 6 3 6 4 6 5 6 5 1 6 6 External Local Oscillator To evaluate the performance of the CMX990 it is recommended that a low noise external oscillator be used for the main LO This is particularly important when performing blocking and adjacent channel tests An external main LO can be supplied via J10 The following changes are recommended e Remove R78 R81 R164 and R200 supplies to on board VCO s e Ensure C98 1nF and R149 18Q are fitted Intermediate Signal Connections The EV9900A allows a user to connect signals at various points in the signal path of the IC Details can be found on the schematic and in the list of connectors Users can choose appropriate matching and configurations to suit their requirements Note that just connecting test equipment to the ports may not give the expected results correct RF matching arrangements are required Firmware Description The EV9900A has no embedded firmware Software Description CML products DE9901 and EV9902 not included can be used with the EV9900A and include related software Application Information TX Loop Operating Power Levels The range of input powers to the feedback port TxFB of the offset loop is designed to allow
24. tionality at 400MHz or 800MHz by component changes Please contact CML for further information e Demonstration of EN 300 113 receive performance e Interfaces that allow the card to be connected to a host uController to allow real time control or to a PC a separate interface may be required e An interface allowing the connection of an external reference clock In summary the EV9900A allows the user to create experiments to investigate all aspects of the CMX990 device The EV9900A is designed to allow user modification to support detailed investigation of each user s specific and different applications Hardware Description Front End LNA The PCB includes a 400MHz discrete bipolar LNA using TRS which is designed for 410 430MHz and to meet EN 300 113 requirements The LNA includes some front end band pass filtering L26 L27 C186 C187 C188 C189 C192 C193 and C194 This can be re configured for operation on other bands with value changes A 1 8dB Pi attenuator R162 R173 R174 follows the LNA output SAW Image Filter By fitting or not fitting certain components the user is able to select either a SAW filter FL1 or additional T attenuation R206 R207 R139 to simulate the typical system loss of such a filter As built the SAW filter is not fitted with the attenuator values fitted to give around 3dB loss Mixer Input The signal from the LNA and filter is then applied to the differential input of the CMX990 RX mixer
25. use this port EV9900A is not configured to use this port EV9900A is not configured to use this port Control port chip select line This pin is useful to trigger measurements on command inputs to the CMX990 registers DAC 0 PA Ramping DAC 1 AFC Void Void Void Void Test point for differential amplifier 2 output Test point for differential amplifier 2 inverting input 2 5V power supply Power amplifier control voltage Table 3 Test Loops 2007 CML Microsystems Plc 11 UM9900A 3 Evaluation Kit for CMX990 EV9900A TEST POINTS Test Point Default Description Ref Measurement p EV9900A is not configured to use this signal EV9900A is not configured to use this signal EV9900A is not configured to use this signal EV9900A is not configured to use this signal EV9900A is not configured to use this signal EV9900A is not configured to use this signal EV9900A is not configured to use this signal EV9900A is not configured to use this signal Transmitter PLL VCO control line EV9900A is not configured to use this signal Main PLL VCO control line Auxiliary PLL VCO control line 2 5V regulator output 5 0V regulator output for digital baseband Analogue ground Analogue ground Digital ground Digital ground 5 0V regulator output for analogue baseband 3 3V regulator output 3 3V regulator output for VCO EV9900A is not configured to use this signal PA output power detector voltage PA Temperature sensor voltage AFC
26. via a balun transformer T3 The input is matched for the particular band of interest L5 L33 L28 IF Filter The IF filter F1A F1B is a 45 1MHz 4 pole crystal filter The pass band of the filter fitted to the EV9900A is approximately 7 5kHz designed for 25kHz channel spacing however other filters are available in the same package outline offering different bandwidths e g 3 75kHz for 12 5kHz channel spacing Correct matching of the filter is necessary to achieving optimum performance Reference Oscillator A 14 4MHz VCTCXO is provided on the PCB U1 If U1 is disabled lifting R1 C4 is removed and C3 fitted an alternative clock source can be applied to J1 2007 CML Microsystems Plc 16 UM9900A 3 Evaluation Kit for CMX990 EV9900A Transmitter The transmitter provides at least 30dBm in the default configuration 410 430MHz The 420MHz PA is tuneable by component changes over the range 150 to 900MHz however lower output power is available over 750MHz The transmit VCO U8 also has very broad tuning range typically from below 400MHz to above 450MHz with a 3 3V charge pump U8 would need to be changed for operation on other bands for example 800MHz contact CML for further information The CMX990 RAM DAC output DAC 0 is connected to the PA control line via a diode and transistor D10 and TR4 to provide sufficient current to the PA control pin Local Oscillators VCO s are provided for the main and aux synt
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