GA Simon, so I have done a better test on the freq. settings between my TRX and the SDR_IQ.
Below is the resulting screen shot.
The freq. of 9996.00 is a time signal and the BFO of my radio is at 700hz, same BFO is also in the SDR's Audio Spectrum.
So switching between the 2 radios the audio output is the same.
For testing have clicked the RESET button in the Console's TOOLS pane and the FREQ jumped to 9.995.520.
I have clicked 2 times +100 and the console's freq jumped lower from 520hz to 320hz as seen in the screen shot.

By the way , the Calibration option (here grayed as I am on a remote pc) carries only +\plus shifts.
Should not be also a minus\- shifting option ?

73
Phil

link to pic is : http://groups.yahoo.com/group/sdr-radio-com/photos/album/1050649225/pic/1736126666/view?picmode=&mode=tn&order=ordinal&start=1&count=20&dir=asc