[ICOM] Fw: Filtering IC 775 DSP
Bill Tippett
btippett at alum.mit.edu
Tue Jun 27 12:29:17 EDT 2006
SP2XF:
> Some people suggested me to install INRAD 2,1 khz filter instead of
> original FL 222 1,9Khz, saying that the original sounds too narrow and
> it's
> useless in fact.
Before you conclude that, try adjustingPBT (assuming the 775
has PBT) to 150-200 Hz. I
thought the 1.8 kHz filters in my FT-1000MP were
useless until I learned this. Same applies
for the Ten-Tec Orion's 1.8 kHz filter. In the
MP, the menu adjustment was called "R LSB CAR"
and "R USB CAR". In Orion it is "PBT". I am not
sure what it may be called in the 775 but perhaps
someone else can tell you.
With PBT properly adjusted, you can copy
SSB down to extremely low DSP bandwidths for
contests (e.g. ~1500 Hz).
73, Bill W4ZV
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