[Elecraft] [K3] K3 Filter problem Part II

[Richard Ferch]

Bill W4ZV wrote:
> Bill W4ZV wrote:
>> 
>> Have you tried CONFIG: SIG RMV?
>> 
> 
> This was implemented in MCU 3.03 / DSP 2.10, 3-17-2009...documentation here:
> 
> http://www.elecraft.com/K3/k3_software.htm
> 
> (K3 Firmware Release Notes, just above "New Firmware Load Information")
> 
> 73,  Bill

Warning: CONFIG:SIG RMV can have side effects. In addition to moving 
fast-moving birdies right outside the bandpass, effectively eliminating 
them, it also moves real signals by a smaller amount.

The net effect is that as you tune slowly past a carrier or CW signal, 
instead of hearing a steady increase or decrease in pitch as you tune, 
you can hear a sudden step in the frequency. If you have overdone the 
SIG RMV, you may even find yourself hearing the same CW signal at the 
same pitch at more than one dial reading, or conversely, finding it 
impossible to tune a CW signal to a particular pitch because of a SIG 
RMV frequency jump.

The bottom line is that you need to use this feature with care.

There may be another solution to these birdies, and that would be to try 
adjusting the positions of the TMP cables that connect the main and sub 
receivers to the KREF3 and KSYN3 boards. IIRC, the positions of these 
cables can affect the strength of these birdies, which may help explain 
why some people have fewer problems with them than others.

73,
Rich VE3KI
K3 #1595