EV9750

EV9750 CML Microcircuits Evaluation Kit for CMX975 COMMUNICATION SEMICONDUCTORS UM9750/1 December 2017 USER MANUAL Advance Information Features Demonstrates the CMX975 Fractional-N RF PLL, IF PLL and VHF IF to 1 to 2.7 GHz Up-converter associated VCOs 1 to 2.7 GHz to VHF IF Down-converter On-board reference oscillator with options for an external CMX973 RF Quadrature Transceiver for full source. demonstration of IF / baseband conversion Flexible configuration allows use of off-chip VCOs. Receiver LNA Divided LO outputs Option for IF SAW filter Powered by external 6.0V power supply Figure 1 EV9750 board 1 Brief Description The EV9750 is a demonstration and evaluation platform for the CMX975. The CMX975 provides functionality consisting of RF PLL/VCO + IF PLL/VCO + Transmit Up-convert Mixer + Receive Down-convert Mixer + LNA. It has been designed to interface with the CMX973 to provide a simple and cost effective RF transceiver for operation in the range 1 to 2.7 GHz. The EV9750 design incorporates a CMX973 to allow conversion to and from the CMX975 IF frequencies to I/Q baseband signals. The CMX975 provides a 700MHz to 6GHz 24-bit Fractional-N RF PLL and an internal RF VCO covering 2.8 to 3.6 GHz. A separate integer-N IF PLL and VCO for 900MHz is also provided. An inductor value change can configure the IF VCO to cover other frequencies. The board includes all necessary voltage regulators and is operated from an external 6V dc supply. The EV9750 provides a 38.4MHz reference oscillator together with an additional off-chip VCO module. External frequency sources can also be configured to provide local oscillator signals for the CMX975 mixers. The EV9750 interfaces to the PE0003 Universal Interface Card, to allow read and write access to the CMX975 and CMX973 C-BUS registers. A PC user interface is available for operational set-up and provides for use of control scripts. 2017 CML Microsystems Plc Evaluation Kit for CMX975 EV9750 CONTENTS Section Page 1 Brief Description ....................................................................................................................................................... 1 2 History 3 3 Block Diagram .......................................................................................................................................................... 4 4 Preliminary Information ........................................................................................................................................... 6 4.1 Laboratory Equipment....................................................................................................................................................... 6 4.1.1 Power Supply ..................................................................................................................................................................... 6 4.2 Handling Precautions ........................................................................................................................................................ 6 4.2.1 SSD Devices ....................................................................................................................................................................... 6 4.2.2 Contents - Unpacking ........................................................................................................................................................ 6 4.3 Approvals........................................................................................................................................................................... 6 5 Quick Start ............................................................................................................................................................... 7 5.1 Setting-Up ......................................................................................................................................................................... 7 5.2 Adjustments ...................................................................................................................................................................... 8 5.3 Operation .......................................................................................................................................................................... 8 5.3.1 Receive down-converter ................................................................................................................................................... 8 5.3.2 Transmit up-converter ...................................................................................................................................................... 9 5.3.3 Signal Lists ....................................................................................................................................................................... 10 6 Circuit Schematics and Board Layouts ..................................................................................................................... 13 7 Detailed Description ............................................................................................................................................... 15 7.1 Hardware Description ..................................................................................................................................................... 15 7.1.1 Tx Up-Convert Mixer ....................................................................................................................................................... 15 7.1.2 LNA .................................................................................................................................................................................. 15 7.1.3 SAW filter ........................................................................................................................................................................ 15 7.1.4 Rx Down-Convert Mixer .................................................................................................................................................. 15 7.1.5 Local Oscillator ................................................................................................................................................................ 15 7.1.6 RF VCO /PLL ..................................................................................................................................................................... 16 7.1.7 IF PLL/VCO ....................................................................................................................................................................... 16 7.1.8 Reference Oscillator ........................................................................................................................................................ 16 7.1.9 External VCOs .................................................................................................................................................................. 16 7.1.10 CMX973 ........................................................................................................................................................................... 17 7.1.11 Power Supplies ................................................................................................................................................................ 17 7.1.12 Inductors ......................................................................................................................................................................... 17 7.2 Adjustments and Controls ............................................................................................................................................... 18 7.3 Script/GUI Control ........................................................................................................................................................... 18 7.3.1 The C-BUS Control Tab .................................................................................................................................................... 19 7.3.2 The C-BUS Control Extended Tab (C-BUS Ctrl Ext. 1 and C-BUS Ctrl Ext. 2) ..................................................................... 20 7.3.3 The General Control Tab ................................................................................................................................................. 22 7.3.4 The VCO Calibration Tab.................................................................................................................................................. 22 7.3.5 The RF PLL Tab ................................................................................................................................................................. 23 7.3.6 The IF PLL tab .................................................................................................................................................................. 23 7.3.7 The CMX973 tabs ............................................................................................................................................................ 24 7.3.8 The Script Handler tab ..................................................................................................................................................... 25 7.4 Application Information .................................................................................................................................................. 27 7.4.1 Typical Performance ........................................................................................................................................................ 27 7.5 Troubleshooting .............................................................................................................................................................. 28 7.5.1 RF PLL Operation ............................................................................................................................................................. 29 7.5.2 IF PLL Operation .............................................................................................................................................................. 29 7.5.3 LNA Operation ................................................................................................................................................................. 29 7.5.4 Rx Operation ................................................................................................................................................................... 30 7.5.5 Tx Operation .................................................................................................................................................................... 30 8 Performance Specification ...................................................................................................................................... 31 8.1 Electrical Performance .................................................................................................................................................... 31 8.1.1 Absolute Maximum Ratings ............................................................................................................................................ 31 8.1.2 Operating Limits .............................................................................................................................................................. 31 8.1.3 Operating Characteristics ................................................................................................................................................ 32 Table Page Table 1 RF Connector List .................................................................................................................................................................. 10 2017 CML Microsystems Plc 2 UM9750/1