Thank you for reply, Marcus.I replaced the USRP B200 with internal GPSDO to USRP B210 without internal GPSDO.However, I got same result. when I typed "sudo ./usrp_list_sensors", sometimes Ref: locked, sometimes Ref: unlocked..I waited about 10 minute, before I executed the application. I thought It needs time to be locked.Following are the outputs.------------------OUTPUT 1-------------------------[INFO] [UHD] linux; GNU C++ version 4.8.4; Boost_105400; UHD_3.11.0.1-0-ge00f1f37[INFO] [B200] Detected Device: B210[INFO] [B200] Operating over USB 3.[INFO] [B200] Initialize CODEC control...[INFO] [B200] Initialize Radio control...[INFO] [B200] Performing register loopback test... [INFO] [B200] Register loopback test passed[INFO] [B200] Performing register loopback test... [INFO] [B200] Register loopback test passed[INFO] [AD936X] Performing CODEC loopback test... [INFO] [AD936X] CODEC loopback test passed[INFO] [AD936X] Performing CODEC loopback test... [INFO] [AD936X] CODEC loopback test passed[INFO] [B200] Setting master clock rate selection to 'automatic'.[INFO] [B200] Asking for clock rate 16.000000 MHz... [INFO] [B200] Actually got clock rate 16.000000 MHz.Device contains 1 motherboard(s). _____________________________________________________ /| Sensors for motherboard 0: | | * Ref: unlocked| _____________________________________________________| /| | RX Sensors: | | | | Chan 0: | | * temp: 39.298248 C| | * RSSI: -50.750000 dB| | * LO: locked| | | | Chan 1: | | * temp: 39.883041 C| | * RSSI: -50.750000 dB| | * LO: locked| | _____________________________________________________| /| | TX Sensors: | | | | Chan 0: | | * temp: 40.175438 C| | * LO: locked| | | | Chan 1: | | * temp: 40.175438 C| | * LO: locked----------------------------- OUTPUT 2--------------------------------------------[INFO] [UHD] linux; GNU C++ version 4.8.4; Boost_105400; UHD_3.11.0.1-0-ge00f1f37[INFO] [B200] Detected Device: B210[INFO] [B200] Operating over USB 3.[INFO] [B200] Initialize CODEC control...[INFO] [B200] Initialize Radio control...[INFO] [B200] Performing register loopback test... [INFO] [B200] Register loopback test passed[INFO] [B200] Performing register loopback test... [INFO] [B200] Register loopback test passed[INFO] [AD936X] Performing CODEC loopback test... [INFO] [AD936X] CODEC loopback test passed[INFO] [AD936X] Performing CODEC loopback test... [INFO] [AD936X] CODEC loopback test passed[INFO] [B200] Setting master clock rate selection to 'automatic'.[INFO] [B200] Asking for clock rate 16.000000 MHz... [INFO] [B200] Actually got clock rate 16.000000 MHz.Device contains 1 motherboard(s). _____________________________________________________ /| Sensors for motherboard 0: | | * Ref: locked| _____________________________________________________| /| | RX Sensors: | | | | Chan 0: | | * temp: 39.298248 C| | * RSSI: -50.750000 dB| | * LO: locked| | | | Chan 1: | | * temp: 39.883041 C| | * RSSI: -50.750000 dB| | * LO: locked| | _____________________________________________________| /| | TX Sensors: | | | | Chan 0: | | * temp: 40.175438 C| | * LO: locked| | | | Chan 1: | | * temp: 40.175438 C| | * LO: lockedHojoon -----------------------Original Message-----------------------From: "Marcus D. Leech via USRP-users" <usrp-users@lists.ettus.com>To: usrp-users@lists.ettus.comSent date: 2018-04-25 11:41:08 GMT +0900 (ROK)Subject: Re: [USRP-users] Octoclock reference unlock On 04/24/2018 10:34 PM, Hojoon Yang via USRP-users wrote: > > Hi, Marcus. > > 1. usrp_list_sensors > > I didn't give any aruguments, I just typed "sudo ./usrp_list_sensors" > > -------------------OUTPUT 1--------------------------------- > > Device contains 1 motherboard(s). > > _____________________________________________________ > / > | Sensors for motherboard 0: > | > | * GPS_GPGGA: > $GPGGA,140136.00,0000.0000,N,00000.0000,E,0,99,1.0,0.0,M,0.0,M,,*5D > | * GPS_GPRMC: > $GPRMC,140136.00,V,0000.0000,N,00000.0000,E,0.0,0.0,010106,,*23 > | * GPS epoch time: 1136124097 seconds > | * GPS lock status: unlocked > | * GPS_SERVO: 06-01-01 0 39517 0.00 1.00E-08 0 0 1 0x38 > | * Ref: locked > | _____________________________________________________ > | / > | | RX Sensors: > | | > | | Chan 0: > | | * temp: 47.485382 C > | | * RSSI: -50.750000 dB > | | * LO: locked > | > | _____________________________________________________ > | / > | | TX Sensors: > | | > | | Chan 0: > | | * temp: 47.485382 C > | | * LO: locked > > -------------------OUTPUT 2--------------------------------- > > Device contains 1 motherboard(s). > > _____________________________________________________ > / > | Sensors for motherboard 0: > | > | * GPS_GPGGA: > $GPGGA,140311.00,0000.0000,N,00000.0000,E,0,99,1.0,0.0,M,0.0,M,,*5A > | * GPS_GPRMC: > $GPRMC,140311.00,V,0000.0000,N,00000.0000,E,0.0,0.0,010106,,*24 > | * GPS epoch time: 1136124192 seconds > | * GPS lock status: unlocked > | * GPS_SERVO: 06-01-01 0 39518 0.00 1.00E-08 0 0 1 0x38 > | * Ref: unlocked > | _____________________________________________________ > | / > | | RX Sensors: > | | > | | Chan 0: > | | * temp: 45.730995 C > | | * RSSI: -50.750000 dB > | | * LO: locked > | > | _____________________________________________________ > | / > | | TX Sensors: > | | > | | Chan 0: > | | * temp: 46.023392 C > | | * LO: locked > > 2. test_clock_synch > > I didn't give any arugument. I typed "sudo ./test_clock_synch" > > ------------------------------------OUTPUT--------------------------------- > > Creating the Clock device with: > [INFO] [UHD] linux; GNU C++ version 4.8.4; Boost_105400; > UHD_3.11.0.1-0-ge00f1f37 > [INFO] [OCTOCLOCK] Opening an OctoClock device... > [INFO] [OCTOCLOCK] Detecting internal GPSDO... > [INFO] [GPS] Found an internal GPSDO: LC_XO, Firmware Rev 0.929a > [INFO] [OCTOCLOCK] Detecting external reference...false > [INFO] [OCTOCLOCK] Detecting switch position...Prefer internal > [INFO] [OCTOCLOCK] Device is using internal reference > > Creating the USRP device with: > [INFO] [B200] Detected Device: B200 > [INFO] [B200] Operating over USB 3. > [INFO] [B200] Detecting internal GPSDO.... > [INFO] [GPS] Found an internal GPSDO: GPSTCXO , Firmware Rev 0.929a > [INFO] [B200] Initialize CODEC control... > [INFO] [B200] Initialize Radio control... > [INFO] [B200] Performing register loopback test... > [INFO] [B200] Register loopback test passed > [INFO] [AD936X] Performing CODEC loopback test... > [INFO] [AD936X] CODEC loopback test passed > [INFO] [B200] Setting master clock rate selection to 'automatic'. > [INFO] [B200] Asking for clock rate 16.000000 MHz... > [INFO] [B200] Actually got clock rate 16.000000 MHz. > > Checking USRP devices for lock. > > > * 3113D41: false > > WARNING: One or more devices not locked. > > Querying Clock for time and setting USRP times... > > Running 10 comparisons at random intervals. > Comparison #1 > * Clock time: 1136131150 > * 3113D41 time: 1136131150 > Comparison #2 > * Clock time: 1136131155 > * 3113D41 time: 1136131155 > Comparison #3 > * Clock time: 1136131162 > * 3113D41 time: 1136131162 > Comparison #4 > * Clock time: 1136131166 > * 3113D41 time: 1136131166 > Comparison #5 > * Clock time: 1136131175 > * 3113D41 time: 1136131175 > Comparison #6 > * Clock time: 1136131180 > * 3113D41 time: 1136131180 > Comparison #7 > * Clock time: 1136131189 > * 3113D41 time: 1136131189 > Comparison #8 > * Clock time: 1136131191 > * 3113D41 time: 1136131191 > Comparison #9 > * Clock time: 1136131201 > * 3113D41 time: 1136131201 > Comparison #10 > * Clock time: 1136131211 > * 3113D41 time: 1136131211 > > Number of matches: 10/10 > > 3. I use UHD_3.11.0.1-0-ge00f1f37 > > 4. The weird thing is that when I executed the test_clock_synch > "without reference clock/PPS connection"(i.e. the usrp does not get > reference clock and PPS from octoclock), > > It also showed that Octoclock time == usrp time, this does not make > sense. For example, > > Running 10 comparisons at random intervals. > Comparison #1 > * Clock time: 1136131502 > * 3113D41 time: 1136131502 > Comparison #2 > * Clock time: 1136131505 > * 3113D41 time: 1136131505 > > .... > > This is totally weird.. Am I something doing wrong? > > FYI, > > when I typed "sudo uhd_find_device" > > the output: > > -------------------------------------------------- > -- UHD Device 0 > -------------------------------------------------- > Device Address: > serial: 3113D41 > name: syssec_b200_1 > product: B200 > type: b200 > > > -------------------------------------------------- > -- UHD Device 1 > -------------------------------------------------- > Device Address: > serial: 312D3E7 > addr: 192.168.10.3 > name: > type: octoclock > > Hojoon > > Your B200 has its *own* GPSDO, from which the B2xx will derive timing and time-of-day information. My understanding is that on some units, the GPSDO 10Mhz output will tend to interfere with the front-panel 10MHz reference input, so in situations where you're likely to use an external clock, it's best to carefully remove the GPSDO unit from the B200. _______________________________________________ USRP-users mailing list USRP-users@lists.ettus.com http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
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