LimeSDR Family » History » Version 41
roh, 10/01/2019 02:49 PM
1 | 1 | laforge | {{>toc}} |
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3 | 30 | pespin | h1. LimeSDR USB |
4 | 1 | laforge | |
5 | 4 | laforge | The "LimeSDR":https://myriadrf.org/projects/limesdr/ is a low-cost SDR board featuring the Lime Microsystems LMS7002 RF chip. |
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7 | 20 | laforge | !{width:700px}LimeSDR_transp_3.jpg! |
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9 | 4 | laforge | Key characteristics include: |
10 | * RF Transceiver: Lime Microsystems LMS7002M MIMO FPRF |
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11 | * FPGA: Altera Cyclone IV EP4CE40F23 – also compatible with EP4CE30F23 |
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12 | 6 | ahuemer | * Memory: 256 MBytes DDR2 SDRAM |
13 | 4 | laforge | * USB 3.0 controller: Cypress USB 3.0 CYUSB3014-BZXC |
14 | * Oscillator: Rakon RPT7050A @ 30.72MHz |
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15 | * Continuous frequency range: 100 kHz – 3.8 GHz |
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16 | * Bandwidth: 61.44 MHz |
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17 | * RF connection: 10 U.FL connectors (6 RX, 4 TX) |
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18 | * Power Output (CW): up to 10 dBm |
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19 | * Multiplexing: 2×2 MIMO |
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20 | * Power: micro USB connector or optional external power supply |
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21 | * Status indicators: programmable LEDs |
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22 | * Dimensions: 100 mm x 60 mm |
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23 | 1 | laforge | |
24 | 3 | laforge | h2. RF Output Power |
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26 | 39 | roh | * +11dB in gsm900 (arfcn 5) |
27 | * +3dB in dcs1800 (arfcn 871) |
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28 | |||
29 | in dcs1800 a reduction in rx power improves phase noise (e.g. max_power_red 5) |
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30 | |||
31 | there is a graph from myriad showing the power vs frequency plot in this thread: https://discourse.myriadrf.org/t/limesdr-s-maximum-transmitting-power-at-different-frequencies/1649 |
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32 | 1 | laforge | |
33 | h2. Clock |
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34 | |||
35 | The on-board clock is a 250ppb VCTCXO. GSM strictly requires 30ppb, but 250ppb _should_ be sufficient for laboratory use. |
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36 | |||
37 | h3. Clock Calibration |
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38 | |||
39 | TBD |
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40 | |||
41 | h3. Using external clock reference |
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42 | |||
43 | 41 | roh | using "clock-ref external" the clock-ref input can be fed with a 10MHz clock from e.g. a gpsdo. |
44 | the signal slope is not really important since there is a full pll which can handle sine as well as rectangle signals. |
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45 | |||
46 | the internal clock reference should be fine for short testing in the lab(<30min) but is not stable enough for longterm use. |
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47 | 1 | laforge | |
48 | 19 | pespin | h1. LimeSDR Mini |
49 | |||
50 | The "LimeSDR Mini":https://myriadrf.org/projects/limesdr/ is a smaller, less expensive version of the original LimeSDR. |
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51 | |||
52 | 22 | laforge | !{width:600px}limesdr-mini-1024x561.jpg! |
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54 | 19 | pespin | Key characteristics include: |
55 | * RF Transceiver: Lime Microsystems LMS7002M FPRF |
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56 | * FPGA: Altera MAX 10 (10M16SAU169C8G) |
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57 | * EEPROM memory: 2 x 128 KB for RF transciever MCU firmware and data |
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58 | * Flash memory: 1 x 4 MB flash memory for data |
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59 | * USB 3.0 controller: FTDI FT601 |
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60 | * Rakon 30.72 MHz VCTCXO |
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61 | * Continuous frequency range: 10 MHz – 3.5 GHz |
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62 | * Bandwidth: 30.72 MHz |
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63 | * RF Connection: 2 x SMA connectors (each can be switched between high and low frequency bands) + 1x U.FL REF CLK |
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64 | * Power Output (CW): up to 10 dBm |
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65 | * Dimensions: 69 mm x 31.4 mm |
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66 | |||
67 | h2. RF Output Power |
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68 | |||
69 | 40 | roh | * +3dB in gsm900 (arfcn 5) |
70 | * -12dB in dcs1800 (arfcn 871) |
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71 | |||
72 | in dcs1800 a reduction in rx power improves phase noise (e.g. max_power_red 5) |
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73 | 19 | pespin | |
74 | 37 | roh | h2. Clock |
75 | |||
76 | 38 | roh | internal clock is ok, but not stable enough (longterm) to run a gsm network. for short term lab use it should be ok. (few minutes). |
77 | providing an external clock is tricky: |
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78 | according to the spec from the clockchip used (ti LMK00105) the input signal needs to have "sharp rectangles 2V/ns or better". |
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79 | this is a limitation of the LimeSDR mini due to no extra pll chip being present, in contrast to the LimeSDR-USB. |
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80 | 37 | roh | |
81 | 35 | roh | h1. LimeNet Micro |
82 | 21 | laforge | |
83 | 35 | roh | !{width:700px}640px-LimeSDR-Micro_v2.1_board.png! |
84 | 21 | laforge | |
85 | 36 | roh | LimeNet Micro is a small all-in-one board combining the sdr, a gpsdo and some rf filters with a raspberry pi compute module3. |
86 | Due to the integrated gpsdo it should have no problems running tdma networks like gsm. |
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87 | |||
88 | setup: install default raspbian (see getting started link below) and osmocom latest or nightly feeds. |
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89 | config: use LNAL or LNAH for rx-path, BAND1 for tx |
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90 | |||
91 | h2. RF Output Power |
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92 | |||
93 | * +7dB in gsm900 (arfcn 5) |
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94 | * -5dB in dcs1800 (arfcn 871) |
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95 | |||
96 | in dcs1800 a reduction in rx power improves phase noise (e.g. max_power_red 5) |
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97 | |||
98 | h2. Clock |
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100 | do not select a specific clock on LimeNet Micro. (remove clock-ref line) |
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101 | when this type of hardware is detected osmo-trx defaults to the gps synchronized clock from the fpga (gpsdo). |
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102 | see led4/led5 for gps status https://wiki.myriadrf.org/LimeNET-Micro_v2.1_hardware_description#Indication_LEDs |
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103 | |||
104 | h2. further information |
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106 | https://wiki.myriadrf.org/LimeNET_Micro |
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107 | https://wiki.myriadrf.org/Getting_Started_with_the_LimeNET-Micro |
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108 | https://wiki.myriadrf.org/LimeNET-Micro_v2.1_hardware_description |
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109 | 1 | laforge | |
110 | 35 | roh | h1. LimeSDR PCIe |
111 | 21 | laforge | |
112 | 35 | roh | !{width:700px}limesdr-pcie-1-1_jpg_project-body.jpg! |
113 | |||
114 | TBD |
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115 | 34 | roh | |
116 | 19 | pespin | h1. OsmoTRX on LimeSDR |
117 | 1 | laforge | |
118 | 32 | pespin | 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: |
119 | * "LimeSuite":https://github.com/myriadrf/LimeSuite.git containing the actual drivers and utilities for LimeSDR (*version 17.09 or later required*, last release @18.06.0@ or @master@ really advised) |
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120 | ** for LimeSDR-mini, you will need 17.10 or later (last release @18.06.0@ or @master@ really advised) |
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121 | 1 | laforge | |
122 | 32 | pespin | If your distro doesn't ship with a LimeSuite new enough, it is advised that you install LimeSuite from osmocom repositories, see [[cellular-infrastructure:MacroBinaryPackages]]. |
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125 | 1 | laforge | {{graphviz_link() |
126 | 5 | laforge | digraph G{ |
127 | rankdir = LR; |
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128 | 29 | laforge | LimeSDR -> LimeSuite [label = "USB/libusb"]; |
129 | 5 | laforge | LimeSuite -> OsmoTRX [label = "osmo-trx-lms"]; |
130 | } |
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131 | 1 | laforge | }} |
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133 | h3. Verifying the driver stack |
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134 | |||
135 | You can ensure that LimeSuite recognizes your device using the *LimeUtil* part of LimeSuite: |
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136 | |||
137 | <pre> |
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138 | 18 | pespin | $ LimeUtil --find |
139 | * [LimeSDR-USB, media=USB 3.0, module=STREAM, addr=1d50:6108, serial=0009060B00xxyyzz] |
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140 | </pre> |
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141 | 27 | laforge | |
142 | 31 | pespin | h3. Running osmo-trx-lms with LimeSDR |
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144 | 33 | pespin | If @rt-prio@ is set in .cfg file, running as root may be required. |
145 | 31 | pespin | |
146 | 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@. |
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147 | |||
148 | <pre> |
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149 | osmo-trx-lms -C osmo-trx.git/doc/examples/osmo-trx-lms/osmo-trx-limesdr.cfg |
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150 | </pre> |
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152 | 27 | laforge | h2. Other LimeSDR related information |
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154 | {{child_pages()}} |