Will The 6700 Noise Blanker Ever Be As Good As The 5000 NB

  • 9
  • Question
  • Updated 5 years ago
  • Answered
The Flex 6700 noise blanker capability does not even come close to the noise blanker(s) capability on the Flex 5000. What is the plan and time frame to "fix" the 6700 blanker?
Photo of W5UN_Dave


  • 316 Posts
  • 30 Reply Likes

Posted 6 years ago

  • 9
Photo of Gerald - K5SDR

Gerald - K5SDR, Employee

  • 833 Posts
  • 1542 Reply Likes
Official Response
Guys, we do plan to do more work on the DSP capabilities in SmartSDR.  However, they won't be in the release due out July 31.  If you want to vote specific features or improvements up, feel free to enter them as an idea and vote them up.  We have to weigh these requests against road map commitments that we have already made public and intend to keep.  

Noise Blanking is an area where direct sampling radios can  shine because of the wide band sampling capabilities.  That may require potentially significant work on the FPGA side so you will have to be patient.  

With regard to Noise Reduction (NR), properly setting the AGC-T threshold for optimal signal to noise ratio will in my opinion always beat any NR algorithm ever created.  NR algorithms use non-linear functions (LMS) to auto-correlate the desired signal.  Given their adaptive non-linear nature, they will always color the desired signal in some way.  Different types of noise will affect NR in different ways with varying results.  On the other hand, setting the AGC-T gain properly will give you the best SNR without distorting or coloring the signal at all.  My personal opinion is that NR will always be inferior to a properly adjusted AGC-T on any rig ever made.