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LimeSDR USB

The LimeSDR is a low-cost SDR board featuring the Lime Microsystems LMS7002 RF chip.

Key characteristics include:
  • RF Transceiver: Lime Microsystems LMS7002M MIMO FPRF
  • FPGA: Altera Cyclone IV EP4CE40F23 – also compatible with EP4CE30F23
  • Memory: 256 MBytes DDR2 SDRAM
  • USB 3.0 controller: Cypress USB 3.0 CYUSB3014-BZXC
  • Oscillator: Rakon RPT7050A @ 30.72MHz
  • Continuous frequency range: 100 kHz – 3.8 GHz
  • Bandwidth: 61.44 MHz
  • RF connection: 10 U.FL connectors (6 RX, 4 TX)
  • Power Output (CW): up to 10 dBm
  • Multiplexing: 2×2 MIMO
  • Power: micro USB connector or optional external power supply
  • Status indicators: programmable LEDs
  • Dimensions: 100 mm x 60 mm

RF Output Power

TBD

Clock

The on-board clock is a 250ppb VCTCXO. GSM strictly requires 30ppb, but 250ppb should be sufficient for laboratory use.

Clock Calibration

TBD

Using external clock reference

TBD

LimeSDR Mini

The LimeSDR Mini is a smaller, less expensive version of the original LimeSDR.

Key characteristics include:
  • RF Transceiver: Lime Microsystems LMS7002M FPRF
  • FPGA: Altera MAX 10 (10M16SAU169C8G)
  • EEPROM memory: 2 x 128 KB for RF transciever MCU firmware and data
  • Flash memory: 1 x 4 MB flash memory for data
  • USB 3.0 controller: FTDI FT601
  • Rakon 30.72 MHz VCTCXO
  • Continuous frequency range: 10 MHz – 3.5 GHz
  • Bandwidth: 30.72 MHz
  • RF Connection: 2 x SMA connectors (each can be switched between high and low frequency bands) + 1x U.FL REF CLK
  • Power Output (CW): up to 10 dBm
  • Dimensions: 69 mm x 31.4 mm

RF Output Power

TBD

LimeSDR PCIe

TBD

OsmoTRX on LimeSDR

In terms of OsmoTRX for LimeSDR, we now have osmo-trx-lms which avoids the previously complex driver stack with UHD, SoapyUHD, SoapySDR, etc. All you need in terms of specific dependencies is:
  • LimeSuite containing the actual drivers and utilities for LimeSDR (version 17.09 or later required, last release 18.06.0 or master really advised)
    • for LimeSDR-mini, you will need 17.10 or later (last release 18.06.0 or master really advised)

If your distro doesn't ship with a LimeSuite new enough, it is advised that you install LimeSuite from osmocom repositories, see MacroBinaryPackages.

Verifying the driver stack

You can ensure that LimeSuite recognizes your device using the LimeUtil part of LimeSuite:

$ LimeUtil --find
  * [LimeSDR-USB, media=USB 3.0, module=STREAM, addr=1d50:6108, serial=0009060B00xxyyzz]

Running osmo-trx-lms with LimeSDR

If rt-prio is set in .cfg file, running as root may be required.

A sample cfg file to run osmo-trx-lms with a LimeSDR device can be found in osmo-trx.git in doc/examples/osmo-trx-lms/osmo-trx-limesdr.cfg.

osmo-trx-lms -C osmo-trx.git/doc/examples/osmo-trx-lms/osmo-trx-limesdr.cfg

Other LimeSDR related information

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