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.