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.
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