Myriad-RF 1 (Reference Board)

Myriad RF-1 Reference Hardware

Created by Azio – order a board ($299)design files on GitHub.

The Myriad–RF 1 board is a multi-band, multi-standard RF module, based on the state of the art LMS6002D transceiver IC by Lime Microsystems. It has one RF broadband output, one RF broadband input with digital baseband interface, established via standard connector FX10A-80P. The board also provides the user with pin headers for power supply, reference clock, analog I/Q input/output and SPI interface connections. It contains everything needed for it to be connected to baseband (BB) chipsets, FPGAs or to run in an standalone mode.

The Myriad-RF 1 board enables developers implement their products for a wide variety of wireless communication applications quickly and efficiently, given the flexibility of the solution. In addition, the designer can make use of the freely available ready-made board implementation, modify and manufacture to accelerate the development time.

Summary

Transceiver                             LMS6002D

RF Bandwidth (BW)                300 MHz to 3800 MHz

Baseband BW                          Programmable (16 selections); 0.75 – 14 MHz, Bypass mode

RF Module Control                 Via SPI interface

Analog Inputs                          I/Q differential analog input for transmitter

Analog Outputs                       I/Q differential analog output from receiver

Reference Clock frequency      23 – 41 MHz  

Input Voltage                           5 V (recommended)

Power

The Myriad–RF 1 board can be powered via the digital interface connector or using an external power supply. The power source is selected manually.

External power supply has to be able to supply 800 mA current, below this the board may be unstable. The maximum voltage level is 6 V.

The power pins are described in detailed the Myriad-RF development manual.

Output and Input

The figure and table below provide key Input/Output configurations, connector assignments and descriptions. The analog differential IQ interface is available on Myriad-RF board and provided via X3 and X4 connectors. X6 and X7 are the RF connectors for receive input and transmitter output, clearly marked in the picture. The board is tuned to support band 1 (Tx 2140 MHz and Rx 1950 MHz) as well as broadband operation. The front end switches are configurable for selecting Receiver inputs and Transmitter outputs via GPIO’s which in turn can be controlled via the X3 connector.

For a detailed information on the setup, please refer to section 3.7 of the Myriad-RF development manual.

Connector

Name

Description

X2

+5 V supply

External +5 V supply.

X3

Digital I/O

The FX10A-80P is a standard connector used to interface the RF board directly to interface board or any other baseband board.

X4

TX  Analog I/Q

Connector used to supply Transmit analog I/Q signals.

X5

RX  Analog I/Q

Connector used to measure Receive analog I/Q signals.

X6

RXTEST

SMA connector provides connection to low band or high band RX input.  Requires preselected RF switch configuration.

X7

TXTEST

SMA connector that provides connection to low band or high band TX output.  Requires preselected RF switch configuration.

X8

Ext – CLK

Connector used to supply PLL clock externally Please refer to section 3.7 for more information.

X9

Ext – SPI

Connector used to control LMS6002DFN SPI registers externally. SPI register are controlled via X3 connector. Please refer to section 3.6 for more information.

Myriad-RF Board Connector Assignments

 

Communication

The LMS6002D register are controlled via SPI interface. The SPI interface can be established via digital connector X3 or external connector X9.

Configuration

The Myriad-RF 1 board is pre-configured to work on UMTS band-1, the most common band used by 3G communications equipment. By connecting the device to a computer it can be configured to run on any mobile frequency band or standard. This can be done by setting up the LMS6002D registers to the required frequency, gain or BB bandwidth setting using an open source graphical user interface (GUI)

Physical dimensions 

The Myriad-RF 1 board measures 5×5.5cm with the SMA connectors. Four screw holes allow the board to be attached to a surface or casing.