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Hello,
I’m connecting my BB60c and TG44 with straight sma-sma connector.
On some settings I see a strange jumps up and down on SNA plot, on other settings plot is clear. See pictures.
Slight modifications of frequency start, stop or samples count can remove jumps or make them appear again.
first example –
Start = 1M, Stop=4.5G, sweep size = 500pts – everything works as expected
Start = 10M, Stop=4.5G, sweep size = 500pts – many jumps 3dB up and down appear on plotCan this be fixed?
Hi Ivan,
The ‘jumps’ you are seeing are due to different calibration settings being applied to the individual IF paths. Each IF is 20MHz wide and each IF has its own set of corrections. For the TG sweeps we did not optimize the bands for overall flatness, as once you store thru the correction differences are stored in the offset and the trace should be flat. Your measurements will not be affected as long as the store through has been performed.
Regards,
A.J.
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