OpenBTS: E110 Cek Daughter Board

From OnnoWiki
Jump to navigation Jump to search

Ubah Master Clock ke 52MHz

Untuk keperluan OpenBTS kita perlu mengubah master clock ke 52MHz. Hal ini dapat dilakukan menggunakan perintah

uhd_usrp_probe --args="master_clock_rate=52e6"


Cek Menggunakan uhd_find_devices

ketik

uhd_find_devices 

Hasilnya

linux; GNU C++ version 4.5.3 20110311 (prerelease); Boost_104500; UHD_003.004.000-7dc76db

--------------------------------------------------
-- UHD Device 0
--------------------------------------------------
Device Address:
    type: e100
    node: /dev/usrp_e0
    name: 
    serial: EBR10Z9E2

Cek Menggunakan uhd_usrp_probe

Tulis

uhd_usrp_probe

Hasilnya

linux; GNU C++ version 4.5.3 20110311 (prerelease); Boost_104500; UHD_003.004.000-7dc76db

-- Opening device node /dev/usrp_e0...
-- Initializing FPGA clock to 64.000000MHz...
-- USRP-E100 clock control: 10
--   r_counter: 2
--   a_counter: 0
--   b_counter: 20
--   prescaler: 8
--   vco_divider: 5
--   chan_divider: 5
--   vco_rate: 1600.000000MHz
--   chan_rate: 320.000000MHz
--   out_rate: 64.000000MHz
-- 
-- Performing wishbone readback test... pass
  _____________________________________________________
 /
|       Device: E-Series Device
|     _____________________________________________________
|    /
|   |       Mboard: E110 (euewanee)
|   |   vendor: 3
|   |   device: 1
|   |   revision: 4
|   |   content: 0
|   |   model: E110
|   |   serial: EBR10Z9E2
|   |   
|   |   Time sources: none, external, _external_
|   |   Clock sources: internal, external, auto
|   |   Sensors: ref_locked
|   |     _____________________________________________________
|   |    /
|   |   |       RX DSP: 0
|   |   |   Freq range: -32.000 to 32.000 Mhz
|   |     _____________________________________________________
|   |    /
|   |   |       RX DSP: 1
|   |   |   Freq range: -32.000 to 32.000 Mhz
|   |     _____________________________________________________
|   |    /
|   |   |       RX Dboard: A
|   |   |   ID: RFX1800 (0x0034)
|   |   |   Serial: E1R11X8R8
|   |   |     _____________________________________________________
|   |   |    /
|   |   |   |       RX Subdev: 0
|   |   |   |   Name: RFX RX
|   |   |   |   Antennas: TX/RX, RX2, CAL
|   |   |   |   Sensors: lo_locked, rssi
|   |   |   |   Freq range: 1500.000 to 2100.000 Mhz
|   |   |   |   Gain range PGA0: 0.0 to 70.0 step 0.0 dB
|   |   |   |   Connection Type: QI
|   |   |   |   Uses LO offset: No
|   |   |     _____________________________________________________
|   |   |    /
|   |   |   |       RX Codec: A
|   |   |   |   Name: ad9522
|   |   |   |   Gain range pga: 0.0 to 20.0 step 1.0 dB
|   |     _____________________________________________________
|   |    /
|   |   |       TX DSP: 0
|   |   |   Freq range: -32.000 to 32.000 Mhz
|   |     _____________________________________________________
|   |    /
|   |   |       TX Dboard: A
|   |   |   ID: RFX1800 (0x0035)
|   |   |   Serial: E1R11X8R8
|   |   |     _____________________________________________________
|   |   |    /
|   |   |   |       TX Subdev: 0
|   |   |   |   Name: RFX TX
|   |   |   |   Antennas: TX/RX, CAL
|   |   |   |   Sensors: lo_locked
|   |   |   |   Freq range: 1500.000 to 2100.000 Mhz
|   |   |   |   Gain Elements: None
|   |   |   |   Connection Type: IQ
|   |   |   |   Uses LO offset: Yes
|   |   |     _____________________________________________________
|   |   |    /
|   |   |   |       TX Codec: A
|   |   |   |   Name: ad9522
|   |   |   |   Gain range pga: -20.0 to 0.0 step 0.1 dB

Cek Menggunakan lantency_test

Tulis perintah

root@usrp-e1xx:/usr/share/uhd/examples# latency_test 

Hasilnya

linux; GNU C++ version 4.5.3 20110311 (prerelease); Boost_104500; UHD_003.004.000-7dc76db

-- Opening device node /dev/usrp_e0...
-- Initializing FPGA clock to 64.000000MHz...
-- USRP-E100 clock control: 10
--   r_counter: 2
--   a_counter: 0
--   b_counter: 20
--   prescaler: 8
--   vco_divider: 5
--   chan_divider: 5
--   vco_rate: 1600.000000MHz
--   chan_rate: 320.000000MHz
--   out_rate: 64.000000MHz
-- 
-- Performing wishbone readback test... pass

UHD Warning:
    The hardware does not support the requested TX sample rate:
    Target sample rate: 25.000000 MSps
    Actual sample rate: 21.333333 MSps
Actual TX Rate: 21.333333 Msps...

UHD Warning:
    The hardware does not support the requested RX sample rate:
    Target sample rate: 25.000000 MSps
    Actual sample rate: 21.333333 MSps
Actual RX Rate: 21.333333 Msps...

ACK 999, UNDERFLOW 0, TIME_ERR 1, other 0


Menggunakan USRP E Utils

Menggunakan usrp-e-loopback

/usr/share/uhd/usrp_e_utils/usrp-e-loopback 
setup memory mapped ring buffer... done
start write thread... 
start read thread... 
..........
seq_errors          0
checksum_errors     0
sent_words32        47972576
recvd_words32       47745124
approx send rate    4.79726Msps
approx recv rate    4.77451Msps


Menggunakan usrp-e-wb-test

/usr/share/uhd/usrp_e_utils/usrp-e-wb-test 
num pass: 0     num fail: 0
num pass: 1000000       num fail: 0
num pass: 2000000       num fail: 0
num pass: 3000000       num fail: 0
num pass: 4000000       num fail: 0
num pass: 5000000       num fail: 0
num pass: 6000000       num fail: 0
num pass: 7000000       num fail: 0
num pass: 8000000       num fail: 0
num pass: 9000000       num fail: 0
num pass: 10000000
num fail: 0

Referensi

Pranala Menarik

Persiapan Hardware

OpenBTS 2.6

OpenBTS 2.8

Ettus E110

Lain Lain

Catatan Legal dan Pendukung

Catatan Sejarah