LMS7002M Quick Starter Manual for EVB7 kit
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Version: 2.2
Last modified: 29/09/2014
system requirements for development work. The configurations are summarized and the
following sections describe the board modifications required to achieve these configurations.
6.3.1.
TCXO’s Configuration
The LMS7002M device provides a flexible clocking scheme which allows the PLL reference
clock and digital interface clock to be independently clocked. In addition, the digital interface
clock can be generated internally in LMS7002M.
The EVB7 board is shipped with a 30.72MHz TCXO. In order to meet the demanding
specifications of the various standards, Lime Microsystems has worked with Rakon to develop a
new part, called E6245LF* that enables the board to meet the required specifications.
The board can accept three different types of TCXO’s as described in Table 4.
Table 4 TCXO Configurations
Size
Reference
number
Part
Number
Description
14.7x9.2
XO2
E5405LF
61.44 MHz Crystal oscillator, used in combination with
divider /2 (U10) for performance improvements
7x5 (4pin)
XO1
E5280LF
30.72 MHz crystal shipped with the board as a default
7x5 (6pin)
XO3
E6245LF
30.72 MHz high performance crystal oscillator.
When E5280LF is fitted the resistor R144 must also
be fitted.
*Please contact Rakon for E6245LF part:
6.3.2.
EVB7 synchronization
The LMS7002M board provides options to synchronize the on-board TCXO with the base band
or test equipment systems. To do that, connect a 10 MHz reference clock generated by the test
equipment to EVB7 board X18 SMA connector. Program the on-board PLL via the GUI
ADF4002 page. When the board is synchronized the LED (LD2) will be lit.
A board that is synchronized with the test equipment or any other RF device will not have
frequency error.
