DE9941A-375 CML Microcircuits

DE9941A Advanced SDR Demonstrator User Manual UM9941A/1 April 2020 USER MANUAL Advance Information Features Demonstration of SDR wireless data modem supporting multiple Provides a demonstration platform for the bit rates and modulation schemes CMX7364 Multi-mode High Performance Wireless Data Modem Direct Conversion Receiver (CMX994E) and Cartesian Feedback On-board PLL and VCO for 350 to 400 MHz Loop Transmitter (CMX998) Operation 1W Transmitter Operation On-board STM32 ARM microcontroller and script handler + USB interface Designed to meet EN 302 561 / EN 300 113 Small size 87mm x 55mm 1 Brief Description The DE9941A is a small demonstration platform for the CMX994E Direct Conversion Receiver, the CMX998 Cartesian Loop Transmitter and the CMX7364 Multi-mode High Performance Wireless Data Modem. The small form factor of the demonstration/evaluation platform is possible due to the compact nature of the CML IC solutions. The DE9941A can be used to demonstrate Tx and Rx performance with multi-level QAM, FSK and GMSK type modulation. Together with the on-board ARM host controller, a full transceiver can be demonstrated using a Function Image and control scripts. The DE9941A provides a Fractional-N PLL and VCO to provide local oscillator signals for the CMX994E and CMX998. The on-board ARM microcontroller, together with the control scripts, gives the user the ability to program the RF synthesiser to the correct operating frequencies. The design also includes a 1W power amplifier, harmonic filter and Tx/Rx switch. The RF performance is designed to be compliant with EN 302 561 / EN 300 113 and all the circuits are provided with power-down capability to allow standby function ality. The design is aimed to be low cost, with a minimum number of component types/values. 2020 CML Microsystems Plc 16 April 2020 Advanced SDR Demonstrator DE9941A CONTENTS Section Page 1 Brief Description ................................................................................................................................................................. 1 2 Block Diagram ..................................................................................................................................................................... 4 3 Preliminary Information ..................................................................................................................................................... 5 3.1 Laboratory Equipment......................................................................................................................................................... 5 3.1.1 Power Supply....................................................................................................................................................................... 5 3.2 Handling Precautions .......................................................................................................................................................... 5 3.2.2 Contents - Unpacking .......................................................................................................................................................... 5 3.3 Approvals............................................................................................................................................................................. 5 4 Quick Start........................................................................................................................................................................... 6 4.1 Setting-Up............................................................................................................................................................................ 6 4.1.1 ES9941A Software and Driver Installation .......................................................................................................................... 7 4.2 Configuration....................................................................................................................................................................... 8 4.2.1 Tx Configuration .................................................................................................................................................................. 8 4.2.2 Rx Configuration .................................................................................................................................................................. 8 4.3 Operation ............................................................................................................................................................................ 8 5 Signal Lists ........................................................................................................................................................................... 9 6 Circuit Schematics and Board Layouts ............................................................................................................................. 10 7 Detailed Description ......................................................................................................................................................... 11 7.1 Hardware Description ....................................................................................................................................................... 11 7.1.1 Harmonic Filter .................................................................................................................................................................. 11 7.1.2 Tx/Rx Switch ...................................................................................................................................................................... 11 7.1.3 Coupler .............................................................................................................................................................................. 11 7.1.4 Power Amplifier................................................................................................................................................................. 11 7.1.5 Transmitter ........................................................................................................................................................................ 11 7.1.6 Receiver ............................................................................................................................................................................. 12 7.1.7 Local Oscillator .................................................................................................................................................................. 12 7.1.8 Reference Oscillator .......................................................................................................................................................... 12 7.1.9 Power Supply..................................................................................................................................................................... 12 7.1.10 Inductors............................................................................................................................................................................ 12 7.1.11 Adjustments and Controls External/Internal LO ............................................................................................................... 12 7.2 Software Description......................................................................................................................................................... 12 7.3 Application Information .................................................................................................................................................... 12 7.3.1 GUI Description ................................................................................................................................................................. 12 7.3.2 Function Image Load ......................................................................................................................................................... 13 7.3.3 Scripts Handler Tab ........................................................................................................................................................... 13 7.3.4 Typical Receiver Results with CMX7364 FI-4 .................................................................................................................... 20 7.3.5 Typical Transmit Performance with CMX7364 FI -4........................................................................................................... 25 7.4 Troubleshooting ................................................................................................................................................................ 32 7.4.1 Receiver Operation............................................................................................................................................................ 32 7.4.2 Transmitter Operation ...................................................................................................................................................... 32 8 Performance Specification ............................................................................................................................................... 33 8.1 Electrical Performance ...................................................................................................................................................... 33 8.1.1 Absolute Maximum Ratings .............................................................................................................................................. 33 8.1.2 Operating Limits ................................................................................................................................................................ 33 8.1.3 Operating Characteristics .................................................................................................................................................. 34 2020 CML Microsystems Plc 2 UM9941A/1