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I'm working on a weak signal station based on the BladeRF and noticed broadband modulation spurs with any type of modulation I've applied. In the simplest case, I'm using osmocom_siggen to modulate a sine wave at 3kHz offset and noticed spurs every 160kHz above and below the desired signal on a spectrum analyzer. The first spur is 35 dB below the signal level. I've corrected for DC and IQ via the spectrum analyzer and changed the TX gains with no relative effect. Thanks in advance!

The sample rate was set at 160k as a default and I did not set the command line argument to change it for my observation. Changing the sample rate to 2M removed the aliases...thanks!