# Something wrong with calibration procedure

**URL:** <https://discourse.myriadrf.org/t/something-wrong-with-calibration-procedure/1163>\
**Category:** LimeSDR\
**Created:** [29 April 2017 12:52 UTC](https://discourse.myriadrf.org/t/something-wrong-with-calibration-procedure/1163 "2017-04-29T12:52:03Z")\
**Posts on this page:** 20\
**Page:** 2

<div class="post-metadata">

**Author:** ![Kc7noa](https://yyz2.discourse-cdn.com/flex034/user_avatar/discourse.myriadrf.org/kc7noa/32/144_2.png) [@Kc7noa](https://discourse.myriadrf.org/u/Kc7noa)\
**Post date:** [23 May 2017 20:53 UTC](https://discourse.myriadrf.org/t/something-wrong-with-calibration-procedure/1163/21 "2017-05-23T20:53:06Z")

</div>

How is the calibration routine in the Ghz ranges … 2 & 3Ghz ?

i calibrated a few months ago and have not since …  
Is it time to run it again ?  
I used the CLI

LimeSuiteCalibrate --freqStart 500000 --freqStop 3800000000

Is that still used ?

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<div class="post-metadata">

**Author:** ![andrewback](https://avatars.discourse-cdn.com/v4/letter/a/22d042/32.png) [@andrewback](https://discourse.myriadrf.org/u/andrewback)\
**Post date:** [24 May 2017 08:07 UTC](https://discourse.myriadrf.org/t/something-wrong-with-calibration-procedure/1163/22 "2017-05-24T08:07:00Z")

</div>

@joshblum has just merged some updates to calibration into the git master branch and should be able to comment further on this.

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<div class="post-metadata">

**Author:** ![joshblum](https://yyz2.discourse-cdn.com/flex034/user_avatar/discourse.myriadrf.org/joshblum/32/18_2.png) [@joshblum](https://discourse.myriadrf.org/u/joshblum)\
**Post date:** [26 May 2017 15:41 UTC](https://discourse.myriadrf.org/t/something-wrong-with-calibration-procedure/1163/23 "2017-05-26T15:41:04Z")

</div>

There were updates to the calibration routines on the master branch. In trying to match this, the SoapySDR wrapper now calibrates when the streams are first started using the LMS7002M::CalibrateRx/Tx()

The old cache may be an issue, I would try to delete ~/.limesuite/LMS7002M\_cache\_values.db

and should be be any lingering issues with the calibration cache, it can be disabled by passing “cacheCalibrations=0” in the device args

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<div class="post-metadata">

**Author:** ![Kc7noa](https://yyz2.discourse-cdn.com/flex034/user_avatar/discourse.myriadrf.org/kc7noa/32/144_2.png) [@Kc7noa](https://discourse.myriadrf.org/u/Kc7noa)\
**Post date:** [30 May 2017 21:21 UTC](https://discourse.myriadrf.org/t/something-wrong-with-calibration-procedure/1163/24 "2017-05-30T21:21:34Z")

</div>

Iv tried the update from git …

Should the old cash be deleted?

kc7noaa@odroid64:~/Downloads/LimeSuite/build$ sudo ldconfig  
kc7noaa@odroid64:~/Downloads/LimeSuite/build$ sudo LimeSuiteCalibrate --freqStart 30000 --freqStop 3800000  
########################################

## Open device with “driver=lime”

########################################  
[INFO] Make connection: ‘LimeSDR-USB [USB 2.0] 9060B00473825’  
[INFO] Estimated reference clock 30.7198 MHz  
[INFO] Selected reference clock 30.720 MHz  
[INFO] Device name: LimeSDR-USB  
[INFO] Reference: 30.72 MHz  
[INFO] Init LMS7002M(0)  
[INFO] LMS7002M cache /home/kc7noaa/.limesuite/LMS7002M\_cache\_values.db  
[INFO] Ver=7, Rev=1, Mask=1  
[INFO] LMS7002M calibration values caching Enable  
[INFO] Rx Filter calibrated from cache  
[INFO] Tx Filter calibrated from cache  
[INFO] Rx Filter calibrated from cache  
[INFO] Tx Filter calibrated from cache  
STREAM:LimeSDR-USB  
boardSerialNumber:0x9060b00473825  
firmwareVersion:3  
hardwareVersion:4  
protocolVersion:1  
########################################

## Initialize “STREAM:LimeSDR-USB”

########################################  
########################################

## Calibrate @ 0.03 MHz

########################################  
SetFrequency using cache values vco:0, csw:13  
SetFrequency using cache values vco:0, csw:13  
############################################################  
Tx calibration values found in cache:  
| DC | GAIN | PHASE  
—±----±-----±-----  
I: | 0 | 2047 | 0  
Q: | 0 | 2047 |  
############################################################  
############################################################  
Tx calibration values found in cache:  
| DC | GAIN | PHASE  
—±----±-----±-----  
I: | 0 | 2047 | 0  
Q: | 0 | 2047 |  
############################################################  
############################################################  
Rx calibration using RSSI INTERNAL ON BOARD loopback  
Rx ch.A @ 30 MHz, BW: 30 MHz, RF input: LNAL, PGA: 12, LNA: 1, TIA: 1  
Rx calibration: using cached values  
Rx calibration values found in cache:  
| DC | GAIN | PHASE  
—±----±-----±-----  
I: | 0 | 2047 | 0  
Q: | 0 | 2047 |  
############################################################  
############################################################  
Rx calibration using RSSI INTERNAL ON BOARD loopback  
Rx ch.B @ 30 MHz, BW: 30 MHz, RF input: LNAL, PGA: 12, LNA: 1, TIA: 1  
Rx calibration: using cached values  
Rx calibration values found in cache:  
| DC | GAIN | PHASE  
—±----±-----±-----  
I: | 0 | 2047 | 0  
Q: | 0 | 2047 |  
############################################################  
deltadB=91.1895, lvldB=-96.1895  
deltadB=87.6978, lvldB=-92.6978  
[INFO] L 1084600  
bestRxIqCorrs = [(0.7452402681756203-0.17215930858119147j), (1.169739244283486+0.24763569769940105j)]  
Failed at 0.03 MHz, skipping…  
unknown setting key: STORE\_RX\_CORRECTIONS  
Cal took 1.64022088051 seconds  
########################################

## Calibrate @ 0.53 MHz

########################################  
SetFrequency using cache values vco:0, csw:13  
SetFrequency using cache values vco:0, csw:13  
############################################################  
Tx calibration values found in cache:  
| DC | GAIN | PHASE  
—±----±-----±-----  
I: | 0 | 2047 | 0  
Q: | 0 | 2047 |  
############################################################  
############################################################  
Rx calibration using RSSI INTERNAL ON BOARD loopback  
Rx ch.A @ 30 MHz, BW: 30 MHz, RF input: LNAL, PGA: 12, LNA: 1, TIA: 1  
Rx calibration: using cached values  
Rx calibration values found in cache:  
| DC | GAIN | PHASE  
—±----±-----±-----  
I: | 0 | 2047 | 0  
Q: | 0 | 2047 |  
############################################################  
deltadB=73.7587, lvldB=-78.7587  
deltadB=85.3117, lvldB=-90.3117  
bestRxIqCorrs = [(0.943152424305427-0.36381403653640493j), (1.0677086206204-0.21067831975140258j)]  
Failed at 0.53 MHz, skipping…  
unknown setting key: STORE\_RX\_CORRECTIONS  
Cal took 1.57345795631 seconds  
########################################

## Calibrate @ 1.03 MHz

########################################  
SetFrequency using cache values vco:0, csw:13  
SetFrequency using cache values vco:0, csw:13  
############################################################  
Tx calibration values found in cache:  
| DC | GAIN | PHASE  
—±----±-----±-----  
I: | 0 | 2047 | 0  
Q: | 0 | 2047 |  
############################################################  
############################################################  
Rx calibration using RSSI INTERNAL ON BOARD loopback  
Rx ch.A @ 30 MHz, BW: 30 MHz, RF input: LNAL, PGA: 12, LNA: 1, TIA: 1  
Rx calibration: using cached values  
Rx calibration values found in cache:  
| DC | GAIN | PHASE  
—±----±-----±-----  
I: | 0 | 2047 | 0  
Q: | 0 | 2047 |  
############################################################  
deltadB=95.921, lvldB=-100.921  
deltadB=93.4292, lvldB=-98.4292  
bestRxIqCorrs = [(0.8408964152537145+0j), (1.1663568337454604-0.23200279900975168j)]  
Failed at 1.03 MHz, skipping…  
unknown setting key: STORE\_RX\_CORRECTIONS  
Cal took 1.5135910511 seconds  
########################################

## Calibrate @ 1.53 MHz

########################################  
SetFrequency using cache values vco:0, csw:13  
SetFrequency using cache values vco:0, csw:13  
############################################################  
Tx calibration values found in cache:  
| DC | GAIN | PHASE  
—±----±-----±-----  
I: | 0 | 2047 | 0  
Q: | 0 | 2047 |  
############################################################  
############################################################  
Rx calibration using RSSI INTERNAL ON BOARD loopback  
Rx ch.A @ 30 MHz, BW: 30 MHz, RF input: LNAL, PGA: 12, LNA: 1, TIA: 1  
Rx calibration: using cached values  
Rx calibration values found in cache:  
| DC | GAIN | PHASE  
—±----±-----±-----  
I: | 0 | 2047 | 0  
Q: | 0 | 2047 |  
############################################################  
deltadB=96.0327, lvldB=-101.033  
deltadB=95.3698, lvldB=-100.37  
bestRxIqCorrs = [(0.7768869870150185+0.32179712645279124j), (0.6324113435770873-0.43388292008347473j)]  
Failed at 1.53 MHz, skipping…  
unknown setting key: STORE\_RX\_CORRECTIONS  
Cal took 1.54731583595 seconds  
########################################

## Calibrate @ 2.03 MHz

########################################  
SetFrequency using cache values vco:0, csw:13  
SetFrequency using cache values vco:0, csw:13  
############################################################  
Tx calibration values found in cache:  
| DC | GAIN | PHASE  
—±----±-----±-----  
I: | 0 | 2047 | 0  
Q: | 0 | 2047 |  
############################################################  
############################################################  
Rx calibration using RSSI INTERNAL ON BOARD loopback  
Rx ch.A @ 30 MHz, BW: 30 MHz, RF input: LNAL, PGA: 12, LNA: 1, TIA: 1  
Rx calibration: using cached values  
Rx calibration values found in cache:  
| DC | GAIN | PHASE  
—±----±-----±-----  
I: | 0 | 2047 | 0  
Q: | 0 | 2047 |  
############################################################  
deltadB=75.8496, lvldB=-80.8496  
deltadB=92.9759, lvldB=-97.9759  
bestRxIqCorrs = [(0.811808105514772+0.05988256340861368j), (1.189207115002721+0j)]  
Failed at 2.03 MHz, skipping…  
unknown setting key: STORE\_RX\_CORRECTIONS  
Cal took 1.42034912109 seconds  
########################################

## Calibrate @ 2.53 MHz

########################################  
SetFrequency using cache values vco:0, csw:13  
SetFrequency using cache values vco:0, csw:13  
############################################################  
Tx calibration values found in cache:  
| DC | GAIN | PHASE  
—±----±-----±-----  
I: | 0 | 2047 | 0  
Q: | 0 | 2047 |  
############################################################  
############################################################  
Rx calibration using RSSI INTERNAL ON BOARD loopback  
Rx ch.A @ 30 MHz, BW: 30 MHz, RF input: LNAL, PGA: 12, LNA: 1, TIA: 1  
Rx calibration: using cached values  
Rx calibration values found in cache:  
| DC | GAIN | PHASE  
—±----±-----±-----  
I: | 0 | 2047 | 0  
Q: | 0 | 2047 |  
############################################################  
deltadB=109.736, lvldB=-114.736  
deltadB=93.8189, lvldB=-98.8189  
bestRxIqCorrs = [(0.6695368859614215-0.44737024449843155j), (1.1442089395189443+0.40940450493910263j)]  
Failed at 2.53 MHz, skipping…  
unknown setting key: STORE\_RX\_CORRECTIONS  
Cal took 1.57004213333 seconds  
########################################

## Calibrate @ 3.03 MHz

########################################  
SetFrequency using cache values vco:0, csw:13  
SetFrequency using cache values vco:0, csw:13  
############################################################  
Tx calibration values found in cache:  
| DC | GAIN | PHASE  
—±----±-----±-----  
I: | 0 | 2047 | 0  
Q: | 0 | 2047 |  
############################################################  
############################################################  
Rx calibration using RSSI INTERNAL ON BOARD loopback  
Rx ch.A @ 30 MHz, BW: 30 MHz, RF input: LNAL, PGA: 12, LNA: 1, TIA: 1  
Rx calibration: using cached values  
Rx calibration values found in cache:  
| DC | GAIN | PHASE  
—±----±-----±-----  
I: | 0 | 2047 | 0  
Q: | 0 | 2047 |  
############################################################  
deltadB=73.2566, lvldB=-78.2566  
deltadB=90.2148, lvldB=-95.2148  
bestRxIqCorrs = [(1.0267610837271657+0.36738099018068104j), (1.039245318735967+0.10235672987466887j)]  
Failed at 3.03 MHz, skipping…  
unknown setting key: STORE\_RX\_CORRECTIONS  
Cal took 1.54192090034 seconds  
########################################

## Calibrate @ 3.53 MHz

########################################  
SetFrequency using cache values vco:0, csw:13  
SetFrequency using cache values vco:0, csw:13  
############################################################  
Tx calibration values found in cache:  
| DC | GAIN | PHASE  
—±----±-----±-----  
I: | 0 | 2047 | 0  
Q: | 0 | 2047 |  
############################################################  
############################################################  
Rx calibration using RSSI INTERNAL ON BOARD loopback  
Rx ch.A @ 30 MHz, BW: 30 MHz, RF input: LNAL, PGA: 12, LNA: 1, TIA: 1  
Rx calibration: using cached values  
Rx calibration values found in cache:  
| DC | GAIN | PHASE  
—±----±-----±-----  
I: | 0 | 2047 | 0  
Q: | 0 | 2047 |  
############################################################  
deltadB=74.1082, lvldB=-79.1082  
deltadB=89.8417, lvldB=-94.8417  
bestRxIqCorrs = [(0.7624609962832543+0.5094601499631364j), (0.9889300762112104+0.024276870733059844j)]  
Failed at 3.53 MHz, skipping…  
unknown setting key: STORE\_RX\_CORRECTIONS  
Cal took 1.58983802795 seconds  
########################################

## Calibrate @ 4.03 MHz

########################################  
SetFrequency using cache values vco:0, csw:13  
SetFrequency using cache values vco:0, csw:13  
############################################################  
Tx calibration values found in cache:  
| DC | GAIN | PHASE  
—±----±-----±-----  
I: | 0 | 2047 | 0  
Q: | 0 | 2047 |  
############################################################  
############################################################  
Rx calibration using RSSI INTERNAL ON BOARD loopback  
Rx ch.A @ 30 MHz, BW: 30 MHz, RF input: LNAL, PGA: 12, LNA: 1, TIA: 1  
Rx calibration: using cached values  
Rx calibration values found in cache:  
| DC | GAIN | PHASE  
—±----±-----±-----  
I: | 0 | 2047 | 0  
Q: | 0 | 2047 |  
############################################################  
deltadB=76.3488, lvldB=-81.3488  
deltadB=87.2287, lvldB=-92.2287  
bestRxIqCorrs = [(0.9236037649997344+0.37264751133400176j), (0.8775181569720708+0.26619222272270493j)]  
Failed at 4.03 MHz, skipping…  
unknown setting key: STORE\_RX\_CORRECTIONS  
Cal took 1.54115200043 seconds  
Done  
libusb: error [do\_close] Device handle closed while transfer was still being processed, but the device is still connected as far as we know  
libusb: error [do\_close] A cancellation hasn’t even been scheduled on the transfer for which the device is closing  
libusb: error [do\_close] Device handle closed while transfer was still being processed, but the device is still connected as far as we know  
libusb: error [do\_close] A cancellation hasn’t even been scheduled on the transfer for which the device is closing  
libusb: error [submit\_bulk\_transfer] submiturb failed error -1 errno=9  
[ERROR] BEGIN DATA READING LIBUSB\_ERROR\_IO  
libusb: error [submit\_bulk\_transfer] submiturb failed error -1 errno=9  
[ERROR] BEGIN DATA READING LIBUSB\_ERROR\_IO  
terminate called without an active exception  
Aborted  
kc7noaa@odroid64:~/Downloads/LimeSuite/build$

dmesg:

[20131.949612] usb 1-1.4: usbfs: process 18829 (python) did not claim interface 0 before use  
kc7noaa@odroid64:~$

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<div class="post-metadata">

**Author:** ![andrewback](https://avatars.discourse-cdn.com/v4/letter/a/22d042/32.png) [@andrewback](https://discourse.myriadrf.org/u/andrewback)\
**Post date:** [2 June 2017 09:01 UTC](https://discourse.myriadrf.org/t/something-wrong-with-calibration-procedure/1163/25 "2017-06-02T09:01:43Z")

</div>

> [@Kc7noa](#):
>
> Should the old cash be deleted?

Yes.

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<div class="post-metadata">

**Author:** ![Kc7noa](https://yyz2.discourse-cdn.com/flex034/user_avatar/discourse.myriadrf.org/kc7noa/32/144_2.png) [@Kc7noa](https://discourse.myriadrf.org/u/Kc7noa)\
**Post date:** [2 June 2017 15:27 UTC](https://discourse.myriadrf.org/t/something-wrong-with-calibration-procedure/1163/26 "2017-06-02T15:27:01Z")

</div>

OK, im sure that the location of that cash is listed in the forum …  
where is it located?

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<div class="post-metadata">

**Author:** ![andrewback](https://avatars.discourse-cdn.com/v4/letter/a/22d042/32.png) [@andrewback](https://discourse.myriadrf.org/u/andrewback)\
**Post date:** [2 June 2017 15:28 UTC](https://discourse.myriadrf.org/t/something-wrong-with-calibration-procedure/1163/27 "2017-06-02T15:28:45Z")

</div>

On Linux there is a db in the .limesuite dir (note preceding dot - meaning hidden) under your home directory.

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<div class="post-metadata">

**Author:** ![Kc7noa](https://yyz2.discourse-cdn.com/flex034/user_avatar/discourse.myriadrf.org/kc7noa/32/144_2.png) [@Kc7noa](https://discourse.myriadrf.org/u/Kc7noa)\
**Post date:** [2 June 2017 15:31 UTC](https://discourse.myriadrf.org/t/something-wrong-with-calibration-procedure/1163/28 "2017-06-02T15:31:54Z")

</div>

.LimeSuite or .limesuite

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<div class="post-metadata">

**Author:** ![andrewback](https://avatars.discourse-cdn.com/v4/letter/a/22d042/32.png) [@andrewback](https://discourse.myriadrf.org/u/andrewback)\
**Post date:** [2 June 2017 15:34 UTC](https://discourse.myriadrf.org/t/something-wrong-with-calibration-procedure/1163/29 "2017-06-02T15:34:17Z")

</div>

andrew@snow:~$ ls -l .limesuite  
total 144  
-rw-r–r-- 1 andrew andrew 13312 May 31 09:27 LMS7002M\_cache\_values.db

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<div class="post-metadata">

**Author:** ![Kc7noa](https://yyz2.discourse-cdn.com/flex034/user_avatar/discourse.myriadrf.org/kc7noa/32/144_2.png) [@Kc7noa](https://discourse.myriadrf.org/u/Kc7noa)\
**Post date:** [7 June 2017 20:22 UTC](https://discourse.myriadrf.org/t/something-wrong-with-calibration-procedure/1163/33 "2017-06-07T20:22:58Z")

</div>

Hey … does the calibration work for the microwave areas yet?

Just did a new calibration and noticed that even at 2.8Ghz calibration failed …

Failed at 2878.5 MHz, skipping…  
ret=-1, flags=0, timeNs=0  
Cal took 1.78085207939 seconds  
########################################

## Calibrate @ 2879 MHz

## ######################################## ############################################################ Tx calibration using RSSI MCU INTERNAL ON BOARD loopback Tx ch.A @ 2879.7 MHz, BW: 30 MHz, RF output: BAND2, Gain: 37 Performed by: MCU

MCU algorithm time: 1 ms  
Current MCU firmware: 3, DC/IQ calibration full  
MCU Ref. clock: 30.72 MHz

Couldn’t see when the failures started – my buffer is set too small.

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<div class="post-metadata">

**Author:** ![robertkb](https://avatars.discourse-cdn.com/v4/letter/r/b19c9b/32.png) [@robertkb](https://discourse.myriadrf.org/u/robertkb)\
**Post date:** [11 June 2017 18:50 UTC](https://discourse.myriadrf.org/t/something-wrong-with-calibration-procedure/1163/34 "2017-06-11T18:50:14Z")

</div>

I was able to record where the cal failure takes place.

After working on other things for a few months, I got back to the LimeSDR the other day. I updated the firmware and rebuilt SoapySDR and LimeSuite from git (this is on Ubuntu 16.04). The LimeSuite Device Info screen says:  
Firmware: 3  
Hardware: 4  
Protocol: 1  
Gateware: 2  
Gateware rev: 8

And SoapySDRUtil --info says:  
######################################################

## Soapy SDR – the SDR abstraction library

######################################################

Lib Version: v0.6.0-g2f6a449e  
API Version: v0.6.0  
ABI Version: v0.6  
Install root: /usr/local  
Search path: /usr/local/lib/SoapySDR/modules0.6  
Module found: /usr/local/lib/SoapySDR/modules0.6/libLMS7Support.so  
Loading modules… done  
Available factories…lime, null,

The LimeSuite version number is 17.03.0-g9eca76d1, built 2017-06-10.

When I issue the following cal command:  
$ LimeSuiteCalibrate --freqStart 2.09e9 --freqStop 2.11e9  
the following error eventually results for the first frequency:

bestRxIqCorrs = [(1.0105848250985343+0.024808464980358432j), (1.1623231012200503-0.05710127237721869j)]  
Failed at 2090 MHz, skipping…  
unknown setting key: STORE\_RX\_CORRECTIONS  
Cal took 11.4917948246 seconds

and all subsequent frequencies fail with this message:  
Failed at 2110 MHz, skipping…  
ret=-1, flags=0, timeNs=0  
Cal took 3.46489500999 seconds

Please note that this same calibration command runs successfully on another machine (RPi3) which has earlier versions of the software:

~ $ LimeUtil --info  
Version information:  
Library version: v17.03.0-g798a81ac  
Build timestamp: 2017-04-26  
Interface version: v2017.3.0  
Binary interface: 17.03-1

SoapySDRUtil --info  
Lib Version: v0.6.0-gfcecfdae  
API Version: v0.6.0  
ABI Version: v0.6-dev  
Install root: /usr/local  
Search path: /usr/local/lib/SoapySDR/modules0.6-dev  
Module found: /usr/local/lib/SoapySDR/modules0.6-dev/libLMS7Support.so  
Module found: /usr/local/lib/SoapySDR/modules0.6-dev/libremoteSupport.so  
Loading modules… done  
Available factories…lime, null, remote,

So, it looks as though something broke between these versions.

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<div class="post-metadata">

**Author:** ![Kc7noa](https://yyz2.discourse-cdn.com/flex034/user_avatar/discourse.myriadrf.org/kc7noa/32/144_2.png) [@Kc7noa](https://discourse.myriadrf.org/u/Kc7noa)\
**Post date:** [11 June 2017 19:08 UTC](https://discourse.myriadrf.org/t/something-wrong-with-calibration-procedure/1163/35 "2017-06-11T19:08:44Z")

</div>

Try renaming or removing the only .db file in /home/.limesuite/

Also a reboot / sudo ldconfig …

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<div class="post-metadata">

**Author:** ![robertkb](https://avatars.discourse-cdn.com/v4/letter/r/b19c9b/32.png) [@robertkb](https://discourse.myriadrf.org/u/robertkb)\
**Post date:** [11 June 2017 20:04 UTC](https://discourse.myriadrf.org/t/something-wrong-with-calibration-procedure/1163/36 "2017-06-11T20:04:03Z")

</div>

Yup, did all those things.

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<div class="post-metadata">

**Author:** ![Kc7noa](https://yyz2.discourse-cdn.com/flex034/user_avatar/discourse.myriadrf.org/kc7noa/32/144_2.png) [@Kc7noa](https://discourse.myriadrf.org/u/Kc7noa)\
**Post date:** [11 June 2017 21:01 UTC](https://discourse.myriadrf.org/t/something-wrong-with-calibration-procedure/1163/37 "2017-06-11T21:01:57Z")

</div>

Because unknown setting key seems suspect

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<div class="post-metadata">

**Author:** ![Kc7noa](https://yyz2.discourse-cdn.com/flex034/user_avatar/discourse.myriadrf.org/kc7noa/32/144_2.png) [@Kc7noa](https://discourse.myriadrf.org/u/Kc7noa)\
**Post date:** [12 June 2017 06:38 UTC](https://discourse.myriadrf.org/t/something-wrong-with-calibration-procedure/1163/38 "2017-06-12T06:38:18Z")

</div>

And after trying on a more stable system … im still getting tge same error as you …

Im confused as to why this is happening … os it a bug or just a failure in the process of updating.

@joshblum any advice on how to proceeded?  
Or @andrewback …

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**Author:** ![Axeman](https://yyz2.discourse-cdn.com/flex034/user_avatar/discourse.myriadrf.org/axeman/32/728_2.png) [@Axeman](https://discourse.myriadrf.org/u/Axeman)\
**Post date:** [13 June 2017 04:49 UTC](https://discourse.myriadrf.org/t/something-wrong-with-calibration-procedure/1163/39 "2017-06-13T04:49:00Z")

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I got a segfault from LimeSuiteCalibrate. I’m using LimeUtil --cal instead. I just updated and recompiled from git.

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**Author:** ![Kc7noa](https://yyz2.discourse-cdn.com/flex034/user_avatar/discourse.myriadrf.org/kc7noa/32/144_2.png) [@Kc7noa](https://discourse.myriadrf.org/u/Kc7noa)\
**Post date:** [14 June 2017 21:20 UTC](https://discourse.myriadrf.org/t/something-wrong-with-calibration-procedure/1163/40 "2017-06-14T21:20:29Z")

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After a sudo apt-get update / upgrade / dist-upgrade, it was working again … BUT

after starting a limited calibration 1ghz to 1.5ghz i wanted to do a single frequency – so i hit “Ctrl-C” to stop the program … it WAS working with out error.

after that i could not get the calibration program from having the for mentioned error !!! — ahhh COME ON !!!

I removed the .db file from .limesuite and made sure that the date/time was updated before the calibration routine was started …

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**Author:** ![Kc7noa](https://yyz2.discourse-cdn.com/flex034/user_avatar/discourse.myriadrf.org/kc7noa/32/144_2.png) [@Kc7noa](https://discourse.myriadrf.org/u/Kc7noa)\
**Post date:** [16 June 2017 02:41 UTC](https://discourse.myriadrf.org/t/something-wrong-with-calibration-procedure/1163/41 "2017-06-16T02:41:13Z")

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> [@Kc7noa](#):
>
> After a sudo apt-get update / upgrade / dist-upgrade, it was working again … BUT
> 
> after starting a limited calibration 1ghz to 1.5ghz i wanted to do a single frequency – so i hit “Ctrl-C” to stop the program … it WAS working with out error.
> 
> after that i could not get the calibration program from having the for mentioned error !!! — ahhh COME ON !!!
> 
> I removed the .db file from .limesuite and made sure that the date/time was updated before the calibration routine was started …

tried the same thing with the Odroid-X2 — did not work.  
Still not sure what the dividing line is …

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**Author:** ![Kc7noa](https://yyz2.discourse-cdn.com/flex034/user_avatar/discourse.myriadrf.org/kc7noa/32/144_2.png) [@Kc7noa](https://discourse.myriadrf.org/u/Kc7noa)\
**Post date:** [1 July 2017 16:43 UTC](https://discourse.myriadrf.org/t/something-wrong-with-calibration-procedure/1163/42 "2017-07-01T16:43:51Z")

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Does Limesuite --cal do both DC offset AND I/Q image calibration?

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**Author:** ![bardia1990](https://avatars.discourse-cdn.com/v4/letter/b/91b2a8/32.png) [@bardia1990](https://discourse.myriadrf.org/u/bardia1990)\
**Post date:** [8 November 2017 08:04 UTC](https://discourse.myriadrf.org/t/something-wrong-with-calibration-procedure/1163/43 "2017-11-08T08:04:07Z")

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hi  
i get this error. how pair it?  
NFO] Ver=7, Rev=1, Mask=1  
[INFO] LMS7002M calibration values caching Disable  
[INFO] L  
libusb: warning [handle\_timeout] async cancel failed -5 errno=22

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