[Orion] Orion Hardware NB bug from N6BV

[Gary Tuck]

I used to get frustrated with v1.372, not only because I couldn't  
always tell if the NB, NR etc were on or off, but also because I  
wasn't sure the AGC setting was correct--other than by ear of  
course.  The lag in updating the bandwidth was a bit disconcerting.   
I stayed with v1.371 and set the Threshold from the menu in the  
Program AGC  setting.  The front panel response time is much better.

Gary W7TEA