Noise blanker setting not saved when changing mode

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  • Updated 11 months ago
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Hi, after a few years of research/fence sitting I finally bought a used 6500 (no 6600 due to the lack of RX loop, which I need). I am using SSDR v 2.1.33 and gradually moving along the learning curve -  I am in general pleased with the radio.

However, I notice that when changing mode, the nb setting is not retained. I have RTFM and tried asking this question via a previous thread without attracting any comment:

I am curious to know if there currently a better way of solving the problem other than having to create mode-based profiles?

I think It would be far simpler to change mode (and retain the nb, setting) using the main mode controls rather than to keep going into the profiles manager. The bandwidth, for example, is retained per mode, so why not the nb? If not, I would like to suggest (or, re-suggest) it for a future version of SSDR.

Many thanks.
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  • curious

Posted 11 months ago

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Photo of Tim - W4TME

Tim - W4TME, Customer Experience Manager

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Official Response
Paul, Noise mitigation techniques, either NB, ANF, WND, etc... have a mode dependency.  Meaning if you have ANF on when in SSB mode and change to a digital mode, it can adversely affect the demodulation of the digital mode you are trying to decode.  Therefore, when there is a mode change (a radio state change), we disable the noise mitigations feature so that they will not interfere with reception and generate unnecessary support calls when the receiver is not working as expected because ANF was left on when used with a previous mode.

Also, noise mitigation is usually used in transient conditions, meaning that noise or interference usually comes and goes, so whether or not it needs to be enabled really depends on if there is a noise source that one of the noise mitigation techniques will work of effectively. Having NW or NB enabled when there is no noise to mitigate, can adversely effection reception quality. These are not set and forget controls which is why they are on the slice menu.  Also, for noise mitigation techniques to work at their best, the AGC-T needs to be optimally set.  These are all covered in the SmartSDR Software Users Guide.

If you want a noise mitigation feature to be constantly on, using Profiles is your best option.