LMS7002M Quick Starter Manual for EVB7 kit
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P a g e
Version: 2.2
Last modified: 29/09/2014
However, the matching networks have been optimized for operation over selected frequency
bands and offer the best performance in these bands. Connectors are provided for 4 RF
transmitter outputs and 6 RF receiver inputs. Further details of the matching networks are
provided in Section 6.3.5.
The evaluation board includes connectors for the baseband analogue differential receiver outputs
and differential transmitter inputs. Additionally, on board high speed differential to single ended
converters allow the EVB7 receivers to indirectly drive 50R test equipment such as spectrum
analysers for baseband testing.
The evaluation board includes a clock generation block, which by default, is a standalone
30.72 MHz low phase noise TXCO. TXCOs at other frequencies can also be fitted and three
different footprints are supported. The EVB7 can be easily modified to operate with external
clock sources. It can also be synchronized to the standard 10 MHz reference of measurement
equipment via an on board PLL. Details of the required changes on EVB7 are given in section
6.3.1 and 6.3.2.
EVB7 includes two kinds of digital I/O, one for control only, and two for data and control.
The USB interface is used to control the LMS7002M SPI via the LMS7002M control software.
The USB port is converted to SPI by an on board microcontroller.
The HSMC connector or the 44 pin header can be used for the buffered digital interface and can
be connected to compatible platforms such as the Lime “Stream” board. The Lime “Stream”
board also provides connections to general purpose lab equipment such as pattern generators and
logic analysers. A pin list for the digital interface can be found in Section 6.2. The logic level
for the digital interface can be set by modifying EVB7 and is described in section 6.3.4.
Additionally these connectors can be used to control the SPI but require the board modifications
described in 6.3.3.
A 7
th
order LC filter can be selected between the analogue output of the LMS7002M and its
digital inputs by using the LMS7002M control software. This allows additional filtering at
100 kHz (IF BW) for 2G applications.
The board includes memory to work with the LMS7002M internal microcontroller. This is
intended to provide calibration support for the LMS7002M and is currently under development.
The memory is programmed via the LMS7002M control software and the USB/SPI interface.
Test points are provided for various test signals including the LMS7002M internal peak and
RSSI detectors as well as various PLL test signals.
More detailed information on the connectors for the evaluation board can be found in Section
6.1. Information about PCB options supported is in Section 6.3.
